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Pegu SR, Sonowal J, Rajkhowa S, Jyoti Das P, Sengar GS, Deb R, Choudhury M, Deka NJ, Paul S, Doley J, Sarma DK, Das S, Mohan NH, Thomas R, Gupta VK. Incidences of Helicobacter infection in pigs and tracing occupational hazard in pig farmers. Comp Immunol Microbiol Infect Dis 2024; 106:102128. [PMID: 38309206 DOI: 10.1016/j.cimid.2024.102128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 12/30/2023] [Accepted: 01/12/2024] [Indexed: 02/05/2024]
Abstract
Helicobacter species (spp.) is a gram-negative spiral-shaped motile bacterium that causes gastritis in pigs and also colonizes in the human stomach. The present study assessed the prevalence of Helicobacter spp. in pig gastric mucosa and the stool of pig farmers in Assam, India. A total of 403 stomach samples from pig slaughter points, 74 necropsy samples of pigs from pig farms, and 97 stool samples from pig farmers were collected. Among the pig stomach samples, 43 (20.09%) of those with gastritis showed the presence of Gram-negative, spiral-shaped organisms, while only 3.04% of stomach samples without lesions had these organisms. Scanning Electron Microscopy (SEM) of urease-positive stomach samples revealed tightly coiled Helicobacter bacteria in the mucus lining. Histopathological examination showed chronic gastritis with hemorrhagic necrosis, leucocytic infiltration, and lymphoid aggregates. PCR confirmed the presence of Helicobacter suis in 19.63% of pig stomach samples and 2.08% of pig farmer stool samples. Additionally, 3.12% of the stool samples from pig farmers were positive for Helicobacter pylori. Phylogenetic analysis revealed distinct clusters of Helicobacter suis with other Helicobacter spp. These findings highlight the prevalence of Helicobacter in both pig gastric mucosa and pig farmer stool. The findings highlight the need for improved sanitation and hygiene practices among pig farmers to minimize the risk of Helicobacter infection in humans.
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Affiliation(s)
- Seema Rani Pegu
- ICAR, National Research Centre on Pig, Rani, Guwahati 781131, Assam, India.
| | - Joyshikh Sonowal
- Multidisciplinary Research Unit, Jorhat Medical College and Hospital, Jorhat 785001, Assam, India.
| | - Swaraj Rajkhowa
- ICAR, National Research Centre on Pig, Rani, Guwahati 781131, Assam, India
| | - Pranab Jyoti Das
- ICAR, National Research Centre on Pig, Rani, Guwahati 781131, Assam, India.
| | | | - Rajib Deb
- ICAR, National Research Centre on Pig, Rani, Guwahati 781131, Assam, India
| | - Manjisa Choudhury
- ICAR, National Research Centre on Pig, Rani, Guwahati 781131, Assam, India
| | - Naba Jyoti Deka
- College of Veterinary Science, AAU, Khanapara, Guwahati 781022, Assam, India
| | - Souvik Paul
- ICAR, National Research Centre on Pig, Rani, Guwahati 781131, Assam, India
| | - Juwar Doley
- ICAR, National Research Centre on Pig, Rani, Guwahati 781131, Assam, India
| | - Dilip Kumar Sarma
- College of Veterinary Science, AAU, Khanapara, Guwahati 781022, Assam, India
| | - Samir Das
- ICAR Research Complex for NEH Region, Umiam 793103, Meghalaya, India
| | - N H Mohan
- ICAR, National Research Centre on Pig, Rani, Guwahati 781131, Assam, India
| | - Rajendran Thomas
- ICAR, National Research Centre on Pig, Rani, Guwahati 781131, Assam, India
| | - Vivek Kumar Gupta
- ICAR, National Research Centre on Pig, Rani, Guwahati 781131, Assam, India
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Taillieu E, Taelman S, De Bruyckere S, Goossens E, Chantziaras I, Van Steenkiste C, Yde P, Hanssens S, De Meyer D, Van Criekinge W, Stock M, Maes D, Chiers K, Haesebrouck F. The role of Helicobacter suis, Fusobacterium gastrosuis, and the pars oesophageal microbiota in gastric ulceration in slaughter pigs receiving meal or pelleted feed. Vet Res 2024; 55:15. [PMID: 38317242 PMCID: PMC10845778 DOI: 10.1186/s13567-024-01274-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Accepted: 01/04/2024] [Indexed: 02/07/2024] Open
Abstract
This study investigated the role of causative infectious agents in ulceration of the non-glandular part of the porcine stomach (pars oesophagea). In total, 150 stomachs from slaughter pigs were included, 75 from pigs that received a meal feed, 75 from pigs that received an equivalent pelleted feed with a smaller particle size. The pars oesophagea was macroscopically examined after slaughter. (q)PCR assays for H. suis, F. gastrosuis and H. pylori-like organisms were performed, as well as 16S rRNA sequencing for pars oesophagea microbiome analyses. All 150 pig stomachs showed lesions. F. gastrosuis was detected in 115 cases (77%) and H. suis in 117 cases (78%), with 92 cases (61%) of co-infection; H. pylori-like organisms were detected in one case. Higher infectious loads of H. suis increased the odds of severe gastric lesions (OR = 1.14, p = 0.038), while the presence of H. suis infection in the pyloric gland zone increased the probability of pars oesophageal erosions [16.4% (95% CI 0.6-32.2%)]. The causal effect of H. suis was mediated by decreased pars oesophageal microbiome diversity [-1.9% (95% CI - 5.0-1.2%)], increased abundances of Veillonella and Campylobacter spp., and decreased abundances of Lactobacillus, Escherichia-Shigella, and Enterobacteriaceae spp. Higher infectious loads of F. gastrosuis in the pars oesophagea decreased the odds of severe gastric lesions (OR = 0.8, p = 0.0014). Feed pelleting had no significant impact on the prevalence of severe gastric lesions (OR = 1.72, p = 0.28). H. suis infections are a risk factor for ulceration of the porcine pars oesophagea, probably mediated through alterations in pars oesophageal microbiome diversity and composition.
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Affiliation(s)
- Emily Taillieu
- Department of Pathobiology, Pharmacology and Zoological Medicine, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium.
| | - Steff Taelman
- Department of Data Analysis and Mathematical Modelling, BIOBIX, Ghent University, 9000, Ghent, Belgium
- Department of Data Analysis and Mathematical Modelling, KERMIT, Ghent University, 9000, Ghent, Belgium
- BioLizard Nv, Ghent, Belgium
| | - Sofie De Bruyckere
- Department of Pathobiology, Pharmacology and Zoological Medicine, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Evy Goossens
- Department of Pathobiology, Pharmacology and Zoological Medicine, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Ilias Chantziaras
- Department of Internal Medicine, Reproduction and Population Medicine, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Christophe Van Steenkiste
- Department of Gastroenterology and Hepatology, University Hospital Antwerp, Antwerp University, Edegem, Belgium
- Department of Gastroenterology and Hepatology, General Hospital Maria Middelares, Ghent, Belgium
| | | | | | | | - Wim Van Criekinge
- Department of Data Analysis and Mathematical Modelling, BIOBIX, Ghent University, 9000, Ghent, Belgium
| | - Michiel Stock
- Department of Data Analysis and Mathematical Modelling, BIOBIX, Ghent University, 9000, Ghent, Belgium
- Department of Data Analysis and Mathematical Modelling, KERMIT, Ghent University, 9000, Ghent, Belgium
| | - Dominiek Maes
- Department of Internal Medicine, Reproduction and Population Medicine, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Koen Chiers
- Department of Pathobiology, Pharmacology and Zoological Medicine, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Freddy Haesebrouck
- Department of Pathobiology, Pharmacology and Zoological Medicine, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
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Abuduwaili M, Takigawa H, Yuge R, Teshima H, Kotachi T, Urabe Y, Ito M, Sentani K, Oue N, Oka S, Kitadai Y, Tanaka S. No significant association between non-Helicobacter pylori Helicobacter infection with gastritis-related indices and gastric cancer. Am J Med Sci 2023; 366:421-429. [PMID: 37660992 DOI: 10.1016/j.amjms.2023.08.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 06/24/2023] [Accepted: 08/29/2023] [Indexed: 09/05/2023]
Abstract
BACKGROUND Non-Helicobacter pylori Helicobacter (NHPH) has recently been linked to various gastric diseases. However, the relationship between NHPH infection and gastric cancer remains controversial. This study aimed to identify the effect of NHPH infection on gastritis and gastric cancer development. MATERIALS AND METHODS Formalin-fixed paraffin-embedded tissues were obtained from 73 patients with gastric cancer, of whom 21 cases were Helicobacter pylori (Hp) current infection, 37 cases were Hp previous infection, and 15 cases were Hp naïve infection, and were screened for NPHPs using polymerase chain reaction. The results were compared with NHPH infection rates in the patients with gastritis-related diseases reported in the previous study. We evaluated the association of NHPH infection with gastritis and clinicopathological features of gastric cancer. RESULTS NHPH infection rates were 4/21 (19%) in "Hp current" patients, 4/37 (11%) in "Hp previous" infection patients, and 1/15 (7%) in "Hp naïve" patients, showing no significant difference in infection rates based on Hp infection status. NHPH infection rates in gastric cancer patients were similar to those in the patients with gastritis-related diseases reported in the previous study. A comparison of NHPH-positive and negative patients showed no significant differences in atrophic gastritis status, serum gastritis markers, or clinicopathological characteristics of gastric cancer, such as localization, size, gross type, differentiation, or depth. CONCLUSIONS The association between gastric cancer and NHPH infection would have important implications for gastric cancer prevention, diagnostics, and treatment, however, no significant association was found in this particular population.
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Affiliation(s)
- Maidina Abuduwaili
- Department of Gastroenterology, Hiroshima University Hospital, Hiroshima, Japan
| | - Hidehiko Takigawa
- Department of Endoscopy, Hiroshima University Hospital, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan.
| | - Ryo Yuge
- Department of Endoscopy, Hiroshima University Hospital, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
| | - Hajime Teshima
- Department of Gastroenterology, Hiroshima University Hospital, Hiroshima, Japan
| | - Takahiro Kotachi
- Department of Gastroenterology, Hiroshima University Hospital, Hiroshima, Japan
| | - Yuji Urabe
- Division of Regeneration and Medicine Center for Translational and Clinical Research, Hiroshima University Hospital, Hiroshima, Japan
| | - Masanori Ito
- Department of General Internal Medicine, Hiroshima University Hospital, Hiroshima, Japan
| | - Kazuhiro Sentani
- Department of Molecular Pathology, Hiroshima University, Hiroshima, Japan
| | - Naohide Oue
- Department of Molecular Pathology, Hiroshima University, Hiroshima, Japan
| | - Shiro Oka
- Department of Gastroenterology, Hiroshima University Hospital, Hiroshima, Japan
| | - Yasuhiko Kitadai
- Department of Health and Science, Prefectural University of Hiroshima, Hiroshima, Japan
| | - Shinji Tanaka
- Department of Endoscopy, Hiroshima University Hospital, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
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Guendulain C, Tamiozzo P, González G, Caffaratti M. [Detection of Helicobacter species in humans and their dog]. REVISTA DE LA FACULTAD DE CIENCIAS MÉDICAS 2023; 80:175-187. [PMID: 37773344 PMCID: PMC10594985 DOI: 10.31053/1853.0605.v80.n3.36769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Accepted: 07/31/2023] [Indexed: 10/01/2023] Open
Abstract
Helicobacter is a genus of Gram-negative bacteria that colonizes the stomach of humans and dogs, among other mammals. The most frequent species found in the gastric mucosa of man is H. pylori, however, there are other species of Helicobacter in the stomach of humans, such as H. suis, H. bizzozeronii, H. felis, H. salomonis and H. heilmannii sensu stricto, named non H. pylori Helicobacter (NHPH) some of which also colonize the dog's stomach. The detection of NHPH in the stomach mucosa of humans with gastric disease, and in a high percentage of dogs, suggests the possibility that these animals play an important role in the pathogenesis and transmission of infection to man, postulating the path of transmission oral-oral or fecal-oral. The aim of this study was to determine whether people with signs of chronic gastritis who have Helicobacter spp. and who own dogs as pets, share the same species with them. The presence of Helicobacter spp. in gastric samples of 30 people with clinical signs of chronic gastritis and histopathological diagnosis of gastric infection with Helicobacter spp. was analyzed by PCR. The presence of Helicobacter spp. was also studied in the dogs of these people. Then, the species of Helicobacter presented was determined in both. In human gastric samples, H. pylori was the only species found, while in dogs, samples were H. bizzozeronii, H. felis, H. salomonis and H. heilmannii. In this work the same species were not found in dogs and their owners.
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5
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Wang H, Gu Y, Zhou G, Chen X, Zhang X, Shao Z, Zhang M. Helicobacter zhangjianzhongii sp. nov., isolated from dog feces. Front Genet 2023; 14:1240581. [PMID: 37823030 PMCID: PMC10562538 DOI: 10.3389/fgene.2023.1240581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Accepted: 09/15/2023] [Indexed: 10/13/2023] Open
Abstract
In 2019, two distinct bacterial isolates were independently isolated from the fecal samples of separate dogs in Beijing, China. These cells exhibit microaerobic, are Gram-negative, motile, and possess a characteristic spiral shape with bipolar single flagellum. They display positive results for the oxidase test while being negative for both catalase and urease. These organisms measure approximately 0.2-0.3 μm in width and 4.5-6 μm in length. The colonies are wet, flat, grey, circular, and smooth with sizes ranging from 1 to 2 mm in diameter after 2 days of growth. However, strains may exhibit variations in size and morphology following extended incubation. Phylogenetic analyses based on the 16S rRNA gene and core genome indicated that these two isolates belong to the genus Helicobacter and formed a robust clade that was remains distinctly separate from currently recognized species. These two isolates shared low dDDH relatedness and ANI values with their closest species Helicobacter canis CCUG 32756T, with these values falling below the commonly cutoff values for strains of the same species. The genomic DNA G + C contents of strain XJK30-2 were 44.93 mol%. Comparing the phenotypic and phylogenetic features between these two isolates and their closely related species, XJK30-2 represents a novel species within the genus Helicobacter, for which the name Helicobacter zhangjianzhongii sp. nov. (Type strain XJK30-2T = GDMCC 1.3695T) is proposed.
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Affiliation(s)
| | | | | | | | | | | | - Maojun Zhang
- State Key Laboratory for Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
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Montijo-Barrios E, Celestino-Pérez OY, Morelia-Mandujano L, Rojas-Maruri CM, Smet A, Haesebrouck F, De Witte C, Romo-González C. Helicobacter bizzozeronii infection in a girl with severe gastric disorders in México: case report. BMC Pediatr 2023; 23:364. [PMID: 37454059 PMCID: PMC10349521 DOI: 10.1186/s12887-023-04142-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 06/19/2023] [Indexed: 07/18/2023] Open
Abstract
BACKGROUND Gastric non-Helicobacter pylori helicobacters (NHPH) naturally colonize the stomach of animals. In humans, infection with these bacteria is associated with chronic active gastritis, peptic ulceration and MALT-lymphoma. H. bizzozeronii belongs to these NHPH and its prevalence in children is unknown. CASE PRESENTATION This case report describes for the first time a NHPH infection in a 20-month-old girl with severe gastric disorders in Mexico. The patient suffered from melena, epigastric pain, and bloating. Gastroscopy showed presence of a Hiatus Hill grade I, a hemorrhagic gastropathy in the fundus and gastric body, and a Forrest class III ulcer in the fundus. Histopathologic examination revealed a chronic active gastritis with presence of long, spiral-shaped bacilli in the glandular lumen. Biopsies from antrum, body and incisure were negative for presence of H. pylori by culture and PCR, while all biopsies were positive for presence of H. bizzozeronii by PCR. Most likely, infection occurred through intense contact with the family dog. The patient received a triple therapy consisting of a proton pump inhibitor, clarithromycin, and amoxicillin for 14 days, completed with sucralfate for 6 weeks, resulting in the disappearance of her complaints. CONCLUSION The eradication could not be confirmed, although it was suggested by clear improvement of symptoms. This case report further emphasizes the zoonotic importance of NHPH. It can be advised to routinely check for presence of both H. pylori and NHPH in human patients with gastric complains.
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Affiliation(s)
- Ericka Montijo-Barrios
- Pediatric Gastroenterology and Nutrition Service, National Institute of Pediatrics, Mexico City, Mexico
| | - Omaha Y Celestino-Pérez
- Pediatric Gastroenterology and Nutrition Service, National Institute of Pediatrics, Mexico City, Mexico
| | - Luis Morelia-Mandujano
- Laboratory of Experimental Bacteriology, National Institute of Pediatrics, Mexico City, Mexico
| | | | - Annemieke Smet
- Translational Research in Immunology and Inflammation, Laboratory of Experimental Medicine and Pediatrics, Faculty of Medicine and Health Sciences, University of Antwerp, Wilrijk, Belgium
| | - Freddy Haesebrouck
- Department of Pathobiology, Pharmacology and Zoological Medicine, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium
| | - Chloë De Witte
- Department of Pathobiology, Pharmacology and Zoological Medicine, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium
| | - Carolina Romo-González
- Laboratory of Experimental Bacteriology, National Institute of Pediatrics, Mexico City, Mexico.
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Cortez Nunes F, Taillieu E, Letra Mateus T, Teixeira S, Haesebrouck F, Amorim I. Molecular Detection of Metronidazole and Tetracycline Resistance Genes in Helicobacter pylori-Like Positive Gastric Samples from Pigs. Antibiotics (Basel) 2023; 12:antibiotics12050906. [PMID: 37237809 DOI: 10.3390/antibiotics12050906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 05/11/2023] [Accepted: 05/12/2023] [Indexed: 05/28/2023] Open
Abstract
Antimicrobial resistance is a major public health concern. The aim of this study was to assess the presence of antibiotic resistance genes, previously reported in Helicobacter pylori, in gastric samples of 36 pigs, in which DNA of H. pylori-like organisms had been detected. Based on PCR and sequencing analysis, two samples were positive for the 16S rRNA mutation gene, conferring tetracycline resistance, and one sample was positive for the frxA gene with a single nucleotide polymorphism, conferring metronidazole resistance. All three amplicons showed the highest homology with H. pylori-associated antibiotic resistance gene sequences. These findings indicate that acquired antimicrobial resistance may occur in H. pylori-like organisms associated with pigs.
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Affiliation(s)
- Francisco Cortez Nunes
- School of Medicine and Biomedical Sciences (ICBAS), University of Porto, 4050-313 Porto, Portugal
- Institute for Research and Innovation in Health (i3S), University of Porto, 4200-135 Porto, Portugal
- Institute of Molecular Pathology and Immunology of the University of Porto (IPATIMUP), 4200-135 Porto, Portugal
| | - Emily Taillieu
- Department of Pathobiology, Pharmacology and Zoological Medicine, Faculty of Veterinary Medicine, Ghent University, B9820 Merelbeke, Belgium
| | - Teresa Letra Mateus
- CISAS-Centre for Research and Development in Agrifood Systems and Sustainability, Escola Superior Agrária, Instituto Politécnico de Viana do Castelo, 4900-347 Viana do Castelo, Portugal
- EpiUnit-Instituto de Saúde Pública da Universidade do Porto, Laboratory for Integrative and Translational Research in Population Health (ITR), Rua das Taipas, n° 135, 4050-091 Porto, Portugal
- Veterinary and Animal Research Centre (CECAV), UTAD, Associate Laboratory for Animal and Veterinary Sciences (AL4AnimalS) Quinta de Prados, 5000-801 Vila Real, Portugal
| | - Sílvia Teixeira
- School of Medicine and Biomedical Sciences (ICBAS), University of Porto, 4050-313 Porto, Portugal
- Institute for Research and Innovation in Health (i3S), University of Porto, 4200-135 Porto, Portugal
- Institute of Molecular Pathology and Immunology of the University of Porto (IPATIMUP), 4200-135 Porto, Portugal
| | - Freddy Haesebrouck
- Department of Pathobiology, Pharmacology and Zoological Medicine, Faculty of Veterinary Medicine, Ghent University, B9820 Merelbeke, Belgium
| | - Irina Amorim
- School of Medicine and Biomedical Sciences (ICBAS), University of Porto, 4050-313 Porto, Portugal
- Institute for Research and Innovation in Health (i3S), University of Porto, 4200-135 Porto, Portugal
- Institute of Molecular Pathology and Immunology of the University of Porto (IPATIMUP), 4200-135 Porto, Portugal
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Ohta E. Pathologic characteristics of infectious diseases in macaque monkeys used in biomedical and toxicologic studies. J Toxicol Pathol 2023; 36:95-122. [PMID: 37101957 PMCID: PMC10123295 DOI: 10.1293/tox.2022-0089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Accepted: 01/16/2023] [Indexed: 04/28/2023] Open
Abstract
Nonhuman primates (NHPs), which have many advantages in scientific research and are often the only relevant animals to use in assessing the safety profiles and biological or pharmacological effects of drug candidates, including biologics. In scientific or developmental experiments, the immune systems of animals can be spontaneously compromised possibly due to background infection, experimental procedure-associated stress, poor physical condition, or intended or unintended mechanisms of action of test articles. Under these circumstances, background, incidental, or opportunistic infections can seriously can significantly complicate the interpretation of research results and findings and consequently affect experimental conclusions. Pathologists and toxicologists must understand the clinical manifestations and pathologic features of infectious diseases and the effects of these diseases on animal physiology and experimental results in addition to the spectrum of infectious diseases in healthy NHP colonies. This review provides an overview of the clinical and pathologic characteristics of common viral, bacterial, fungal, and parasitic infectious diseases in NHPs, especially macaque monkeys, as well as methods for definitive diagnosis of these diseases. Opportunistic infections that can occur in the laboratory setting have also been addressed in this review with examples of cases of infection disease manifestation that was observed or influenced during safety assessment studies or under experimental conditions.
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Affiliation(s)
- Etsuko Ohta
- Global Drug Safety, Eisai Co., Ltd., 5-1-3 Tokodai,
Tsukuba-shi, Ibaraki 300-2635, Japan
- *Corresponding author: E Ohta (e-mail: )
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9
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Kawamura Y, Fujimoto Y, Kutsuna R, Tomida J, Yamamoto KI, Miyoshi-Akiyama T, Okuno M, Ogura Y, Matsuoka M, Kawaguchi T, Tsutsuki H, Sawa T. Helicobacter kumamotonensis sp. nov., isolated from human clinical specimens. Int J Syst Evol Microbiol 2023; 73. [PMID: 36920987 DOI: 10.1099/ijsem.0.005732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023] Open
Abstract
A Gram-stain-negative, spiral bacterium (PAGU 1991T) was isolated from the blood of a patient with diffuse large B-cell lymphoma. Phylogenetic analysis based on 16S rRNA gene sequences showed that the isolate was very closely related to Helicobacter equorum LMG 23362T (99.1 % similarity), originally isolated from a faecal sample from a healthy horse. PAGU 1991T was also very closely related to PAGU 1750 in our strain library (=CCUG 41437) with 99.7 % similarity. Additional phylogenetic analyses based on the 23S rRNA gene sequence and GyrA amino acid sequence further supported the close relationship between the two human isolates (PAGU 1991T and PAGU 1750) and the horse strain. However, a phylogenetic analysis based on 16S rRNA showed that the two human isolates formed a lineage that was distinct from the horse strain (less than 99.2 % similarity). In silico whole-genome comparisons based on digital DNA-DNA hybridization, average nucleotide identity based on blast and orthologous average nucleotide identity using usearch between the two human isolates and the type strain of H. equorum showed values of less than 52.40, 93.47, and 93.50 %, respectively, whereas those between the two human isolates were 75.8, 97.2, and 97.2 %, respectively. These data clearly demonstrated that the two human isolates formed a single species, distinct from H. equorum. Morphologically, the human isolates could be distinguished by the type of flagella; the human isolates showed a bipolar sheathed flagellum, whereas that of H. equorum was monopolar. Biochemically, the human isolate was characterized by growth at 42 °C under microaerobic conditions and nitrate reduction unability. We conclude that the two human isolates, obtained from geographically and temporally distinct sources, were a novel species, for which we propose the name Helicobacter kumamotonensis sp. nov., with the type strain PAGU 1991T (=GTC 16810T=CCUG 75774T).
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Affiliation(s)
- Yoshiaki Kawamura
- Department of Microbiology, Aichi Gakuin University, School of Pharmacy,, 1-100 Kusumoto-cho, Nagoya, Aichi 464-8650, Japan
| | - Yuko Fujimoto
- Department of Microbiology, Aichi Gakuin University, School of Pharmacy,, 1-100 Kusumoto-cho, Nagoya, Aichi 464-8650, Japan
| | - Ryo Kutsuna
- Department of Microbiology, Aichi Gakuin University, School of Pharmacy,, 1-100 Kusumoto-cho, Nagoya, Aichi 464-8650, Japan
| | - Junko Tomida
- Department of Microbiology, Aichi Gakuin University, School of Pharmacy,, 1-100 Kusumoto-cho, Nagoya, Aichi 464-8650, Japan
| | - Kei-Ichi Yamamoto
- Department of Microbiology, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjou, Kumamoto, Kumamoto 860-8556, Japan
| | - Tohru Miyoshi-Akiyama
- Pathogenic Microbe laboratory, Research Institute, National Center for Global Health and Medicine, 1-21-1 Toyama, Shinjuku, Tokyo 162-8655, Japan
| | - Miki Okuno
- Division of Microbiology, Department of Infectious Medicine, Kurume University School of Medicine, 67 Asahi-machi, Kurume, Fukuoka, 830-0011, Japan
| | - Yoshitoshi Ogura
- Division of Microbiology, Department of Infectious Medicine, Kurume University School of Medicine, 67 Asahi-machi, Kurume, Fukuoka, 830-0011, Japan
| | - Masao Matsuoka
- Department of Hematology, Rheumatology and Infectious Disease, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjou, Kumamoto, Kumamoto 860-8556, Japan
| | - Tatusya Kawaguchi
- Department of Medical Technology, Faculty of Health Science, Kumamoto Health Science University, 325 Izumi-machi, Kita-ku, Kumamoto, 861-5598, Japan
| | - Hiroyasu Tsutsuki
- Department of Microbiology, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjou, Kumamoto, Kumamoto 860-8556, Japan
| | - Tomohiro Sawa
- Department of Microbiology, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjou, Kumamoto, Kumamoto 860-8556, Japan
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Bansil R, Constantino MA, Su-Arcaro C, Liao W, Shen Z, Fox JG. Motility of Different Gastric Helicobacter spp. Microorganisms 2023; 11:634. [PMID: 36985208 PMCID: PMC10058440 DOI: 10.3390/microorganisms11030634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 02/24/2023] [Accepted: 02/28/2023] [Indexed: 03/06/2023] Open
Abstract
Helicobacter spp., including the well-known human gastric pathogen H. pylori, can cause gastric diseases in humans and other mammals. They are Gram-negative bacteria that colonize the gastric epithelium and use their multiple flagella to move across the protective gastric mucus layer. The flagella of different Helicobacter spp. vary in their location and number. This review focuses on the swimming characteristics of different species with different flagellar architectures and cell shapes. All Helicobacter spp. use a run-reverse-reorient mechanism to swim in aqueous solutions, as well as in gastric mucin. Comparisons of different strains and mutants of H. pylori varying in cell shape and the number of flagella show that their swimming speed increases with an increasing number of flagella and is somewhat enhanced with a helical cell body shape. The swimming mechanism of H. suis, which has bipolar flagella, is more complex than that of unipolar H. pylori. H. suis exhibits multiple modes of flagellar orientation while swimming. The pH-dependent viscosity and gelation of gastric mucin significantly impact the motility of Helicobacter spp. In the absence of urea, these bacteria do not swim in mucin gel at pH < 4, even though their flagellar bundle rotates.
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Affiliation(s)
- Rama Bansil
- Department of Physics, Boston University, Boston, MA 02215, USA
| | | | | | - Wentian Liao
- Department of Physics, Boston University, Boston, MA 02215, USA
| | - Zeli Shen
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02138, USA
| | - James G. Fox
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02138, USA
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11
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Akcakavak G, Tuzcu M, Tuzcu N, Celik Z, Tural A, Dagar O. Investigation with Real-Time PCR and Histopathology on the presence of H. felis, H. heilmannii and H. pylori in dogs. REVISTA CIENTÍFICA DE LA FACULTAD DE CIENCIAS VETERINARIAS 2023. [DOI: 10.52973/rcfcv-e33214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
Helicobacter species such as H. heilmannii, H. pylori, H. felis, H. bizzozeronii and H. salomonis have been identified in cats and dogs, and research suggesting that these species may be zoonotic agents and has been studied intensified in recent years. The aim of this study was to reveal the presence, comparing the histopathological findings and Real-time PCR results of H. felis, H. heilmannii, and H. pylori in the stomach and liver tissues taken during the necropsies of owned, stray or shelter dogs. The material of the study consisted of stomach and liver tissues taken from 35 dogs that died for different reasons and were brought for necropsy. DNA copies of H. heilmannii were detected by Real-time PCR in the liver samples of 30 dogs using H. heilmannii-specific primers. In the case of gastric samples, Real-time PCR detected H. heilmannii in 13 cases, H. pylori in 3 cases, both H. heilmannii and H. pylori in 13 cases, and H. felis, H. heilmannii and H. pylori in 3 cases. Microscopically, neutrophil leukocyte infiltration, epithelial degeneration, fibrosis and oedema in the lamina propia, and lymphoplasmacytic cell infiltration were determined in the stomachs. In the Hemotoxylin Eosin staining of the sections, 5 cases and 14 cases in the Warthin–Starry staining were found positive for Helicobacter-like microorganisms. Microscopically, dissociation of the remark cords and hydropic degeneration in hepatocytes, and focal mononuclear cell infiltrations in some sections were determined in the livers. In conclusion, with this study, it was understood that Real-time PCR analyzes are very useful in the diagnosis of H. felis, H. heilmannii, and H. pylori. However, histopathological examinations are necessary to associate the presence of bacteria with the development of the disease.
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Affiliation(s)
- Gokhan Akcakavak
- Yozgat Bozok University, Faculty of Veterinary Medicine, Department of Pathology Sorgun, Yosgat, Turkey
| | - Mehmet Tuzcu
- Selcuk University, Faculty of Veterinary Medicine, Department of Pathology. Selcuklu, Konya, Turkey
| | - Nevin Tuzcu
- Selcuk University, Faculty of Pharmacy, Department of Pharmaceutical Microbiology. Selcuklu, Konya, Turkey
| | - Zeynep Celik
- Selcuk University, Faculty of Veterinary Medicine, Department of Pathology. Selcuklu, Konya, Turkey
| | - Aysenur Tural
- Selcuk University, Faculty of Veterinary Medicine, Department of Pathology. Selcuklu, Konya, Turkey
| | - Osman Dagar
- Selcuk University, Faculty of Veterinary Medicine, Department of Pathology. Selcuklu, Konya, Turkey
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12
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Ezrin immunoexpression in gastric cells of domestic cats infected with Helicobacter spp. Res Vet Sci 2023; 154:84-88. [PMID: 36512978 DOI: 10.1016/j.rvsc.2022.12.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 11/07/2022] [Accepted: 12/02/2022] [Indexed: 12/13/2022]
Abstract
The aim of this study was to evaluate de immunoexpression of ezrin in gastric cells of domestic cats infected with Helicobacter spp. and with chronic gastritis. Twenty paraffin-embedded gastric samples were selected based on previous positive results for Helicobacter spp. in the Rapid Urease Test, Warthin-Starry staining and cytology. Haematoxylin-eosin stained sections was done to evaluate inflammatory cell infiltrates. Immunohistochemical analysis was done using anti-Helicobacter pylori and anti-Ezrin antibodies. The analysis of inflammatory infiltrates revealed 8/20 (40%) in score 0, 11/20 (55%) in score 1 and 1/20 (5%) in score 2. The labelling observed in the immunohistochemical analysis using anti-Helicobacter spp. antibody showed no samples with score 0; 4/20 (20%) with score 1; 7/20 35% with score 2 and 9/20 (45%) with score 3. Ezrin overexpression on the cytoplasm of parietal cells was revealed in 18 out of 20 samples (90%). Of these, 10 cases (45%) achieved the score 1; 6 cases (30%) the score 2 and 2 cases (10%) the score 3. On the surface and pit cells there was an increase in Ezrin immnoexpression in 12 out of the 20 samples (60%), of which 8 samples (40%) achieved the score 1 and 4 samples (20%) the score 2. No sample were classified in score 3. Statistically significant differences (p = 0.026) were observed between the inflammatory infiltrate in the gastric mucosa and the immunoexpression of Ezrin in the cytoplasm of parietal cells. It was concluded that ezrin had an increased immunoexpression in the gastric mucosa of cats with chronic gastritis.
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13
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Cortez Nunes F, Teixeira S, Maia RL, Amorim I, Letra Mateus T. Perception and Knowledge of Portuguese Veterinarians about the Zoonotic Transmission of Helicobacter pylori and Helicobacter suis: The Need for One Health Intervention. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:15087. [PMID: 36429805 PMCID: PMC9690467 DOI: 10.3390/ijerph192215087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Revised: 11/08/2022] [Accepted: 11/14/2022] [Indexed: 06/16/2023]
Abstract
Helicobacter species can colonize the gastrointestinal tract of both humans and animals, and are associated with gastrointestinal and extra-gastrointestinal diseases. Some studies indicate that animals, health professionals, and people in close contact with animals might be at higher risk for infection with gastric Helicobacter spp. Considering that veterinarians are professionals at risk for infection with zoonotic gastric Helicobacters and are also seen by many as health communicators concerning zoonoses, the aim of this study was to evaluate the Portuguese veterinarians' perception and knowledge of Helicobacter spp. infection and its zoonotic risk/potential. Therefore, a structured questionnaire composed of 34 dichotomic, multiple-choice, rating scale, matrix, drop-down, and open-ended questions was developed and given to Portuguese veterinarians via an online platform from May 2021 to July 2021, and statistical analysis was used to obtain results. There was a total of 149 respondents, most of them (73.8%) being females. Evidently, Portuguese veterinarians have a limited perception regarding Helicobacter spp. infections. Of the respondents that "have heard of Helicobacter", 17.6% do not know which animal species can be affected by it. Most of the companion animal veterinarians (76.2%) do not consider Helicobacter spp. infection a differential diagnosis when evaluating animals with gastritis. A significant percentage (37.2%) of the respondents that have "heard of H. suis" do not consider it a zoonotic bacterium. There is a need for education and sensitization of veterinarians regarding the potential zoonotic risk of Helicobacter spp. in order to elucidate these professionals to this One Health issue, as the number of reports of non-Helicobacter pylori Helicobacter in livestock, companion, and wild animals is increasing.
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Affiliation(s)
- Francisco Cortez Nunes
- School of Medicine and Biomedical Sciences (ICBAS), University of Porto, 4050-313 Porto, Portugal
- Institute for Research and Innovation in Health (i3S), University of Porto, 4200-135 Porto, Portugal
- Institute of Molecular Pathology and Immunology of the University of Porto (IPATIMUP), 4200-135 Porto, Portugal
| | - Silvia Teixeira
- School of Medicine and Biomedical Sciences (ICBAS), University of Porto, 4050-313 Porto, Portugal
- Institute for Research and Innovation in Health (i3S), University of Porto, 4200-135 Porto, Portugal
- Institute of Molecular Pathology and Immunology of the University of Porto (IPATIMUP), 4200-135 Porto, Portugal
| | - Rui Leandro Maia
- UFP Energy, Environment and Health Research Unit (FP-ENAS), Universidade Fernando Pessoa, Praça 9 de Abril, 349, 4249-004 Porto, Portugal
- CITCEM—Centro de Investigação Transdisciplinar «Cultura, Espaço e Memória», Faculdade de Letras da Universidade do Porto, Via Panorâmica s/n, 4150-564 Porto, Portugal
| | - Irina Amorim
- School of Medicine and Biomedical Sciences (ICBAS), University of Porto, 4050-313 Porto, Portugal
- Institute for Research and Innovation in Health (i3S), University of Porto, 4200-135 Porto, Portugal
- Institute of Molecular Pathology and Immunology of the University of Porto (IPATIMUP), 4200-135 Porto, Portugal
| | - Teresa Letra Mateus
- CISAS—Centre for Research and Development in Agrifood Systems and Sustainability, Escola Superior Agrária, Instituto Politécnico de Viana do Castelo, 4900-347 Viana do Castelo, Portugal
- EpiUnit—Instituto de Saúde Pública da Universidade do Porto, Laboratory for Integrative and Translational Research in Population Health (ITR), Rua das Taipas, nº 135, 4050-091 Porto, Portugal
- Veterinary and Animal Research Centre (CECAV), UTAD, Associate Laboratory for Animal and Veterinary Sciences (AL4AnimalS) Quinta de Prados, 5000-801 Vila Real, Portugal
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14
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Cortez Nunes F, Letra Mateus T, Taillieu E, Teixeira S, Carolino N, Rema A, De Bruyckere S, Gärtner F, Haesebrouck F, Amorim I. Molecular detection of Helicobacter spp. and Fusobacterium gastrosuis in pigs and wild boars and its association with gastric histopathological alterations. Vet Res 2022; 53:78. [PMID: 36209119 PMCID: PMC9548099 DOI: 10.1186/s13567-022-01101-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Accepted: 09/06/2022] [Indexed: 08/30/2023] Open
Abstract
Besides Helicobacter pylori, a Gram-negative bacterium that may cause gastric disorders in humans, non-Helicobacter pylori helicobacters (NHPH) may also colonize the stomach of humans and animals. In pigs, H. suis can induce gastritis and may play a role in gastric ulcer disease, possibly in association with Fusobacterium gastrosuis. In the present study, gastric samples from 71 slaughtered pigs and 14 hunted free range wild boars were tested for the presence of DNA of F. gastrosuis and gastric Helicobacter species associated with pigs, dogs cats and humans, using species-specific PCR assays, followed by sequencing of the amplicon. These gastric samples were also histopathologically evaluated. Almost all the pigs presented gastritis (95.8%). Helicobacter spp. were detected in 78.9% and F. gastrosuis in 35.2% of the animals. H. suis was the most frequently identified Helicobacter species (57.7% of the animals), followed by a H. pylori-like species (50.7%) and less often H. salomonis and H. felis (each in 2.8% of the animals). H. suis was most often detected in the glandular (distal) part of the stomach (pars oesophagea 9.9%, oxyntic mucosa 35.2%, antral mucosa 40.8%), while the H. pylori-like species was mainly found in the non-glandular (proximal) part of the stomach (pars oesophagea 39.4%, oxyntic mucosa 14.1%, antral mucosa 4.2%). The great majority of wild boars were also affected with gastritis (71.4%) and Helicobacter spp. and F. gastrosuis were detected in 64.3% and 42.9% of the animals, respectively. H. bizzozeronii and H. salomonis were the most frequently detected Helicobacter species, while a H. pylori-like species and H. suis were only occasionally identified. These findings suggest that these microorganisms can colonize the stomach of both porcine species and may be associated with gastric pathology. This should, however, be confirmed through bacterial isolation. This is the first description of the presence of F. gastrosuis DNA in the stomach of wild boars and a H. pylori-like species in the pars oesophagea of the porcine stomach.
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Affiliation(s)
- Francisco Cortez Nunes
- School of Medicine and Biomedical Sciences (ICBAS), University of Porto, 4050-313, Porto, Portugal.,Institute for Research and Innovation in Health (i3S), University of Porto, 4200-135, Porto, Portugal.,Institute of Molecular Pathology and Immunology of the University of Porto (IPATIMUP), 4200-135, Porto, Portugal
| | - Teresa Letra Mateus
- CISAS-Centre for Research and Development in Agrifood Systems and Sustainability, Escola Superior Agrária, Instituto Politécnico de Viana do Castelo, 4900-347, Viana do Castelo, Portugal.,Laboratory for Integrative and Translational Research in Population Health (ITR), EpiUnit, Instituto de Saúde Pública da Universidade do Porto, Rua das Taipas, no. 135, 4050-091, Porto, Portugal.,Associate Laboratory for Animal and Veterinary Sciences (AL4AnimalS) Quinta de Prados, Veterinary and Animal Research Centre (CECAV), UTAD, 5000-801, Vila Real, Portugal
| | - Emily Taillieu
- Department of Pathobiology, Pharmacology and Zoological Medicine, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium
| | - Sílvia Teixeira
- School of Medicine and Biomedical Sciences (ICBAS), University of Porto, 4050-313, Porto, Portugal.,Institute for Research and Innovation in Health (i3S), University of Porto, 4200-135, Porto, Portugal.,Institute of Molecular Pathology and Immunology of the University of Porto (IPATIMUP), 4200-135, Porto, Portugal
| | - Nuno Carolino
- Department of Veterinary Sciences, Vasco da Gama Research Center (CIVG), Vasco da Gama University School, Coimbra, Portugal.,Centre for Interdisciplinary Research in Animal Health (CIISA), University of Lisboa, Lisbon, Portugal.,National Institute for Agrarian and Veterinarian Research, I.P., Vale de Santarém, Portugal
| | - Alexandra Rema
- School of Medicine and Biomedical Sciences (ICBAS), University of Porto, 4050-313, Porto, Portugal
| | - Sofie De Bruyckere
- Department of Pathobiology, Pharmacology and Zoological Medicine, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium
| | - Fátima Gärtner
- Institute for Research and Innovation in Health (i3S), University of Porto, 4200-135, Porto, Portugal.,Institute of Molecular Pathology and Immunology of the University of Porto (IPATIMUP), 4200-135, Porto, Portugal
| | - Freddy Haesebrouck
- Department of Pathobiology, Pharmacology and Zoological Medicine, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium
| | - Irina Amorim
- School of Medicine and Biomedical Sciences (ICBAS), University of Porto, 4050-313, Porto, Portugal. .,Institute for Research and Innovation in Health (i3S), University of Porto, 4200-135, Porto, Portugal. .,Institute of Molecular Pathology and Immunology of the University of Porto (IPATIMUP), 4200-135, Porto, Portugal.
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15
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Dahmen K, Fischer H, Burczynski V, Albanese V, Muñoz E. Four cases of stomach perforation in adult horses. VETERINARY RECORD CASE REPORTS 2022. [DOI: 10.1002/vrc2.476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Katrin Dahmen
- Tierärztliches Kompetenzzentrum für Pferde Großwallstadt Altano GmbH Großwallstadt Germany
| | - Holger Fischer
- Tierärztliches Kompetenzzentrum für Pferde Großwallstadt Altano GmbH Großwallstadt Germany
| | - Victoria Burczynski
- Tierärztliches Kompetenzzentrum für Pferde Großwallstadt Altano GmbH Großwallstadt Germany
| | - Valeria Albanese
- Tierärztliches Kompetenzzentrum für Pferde Großwallstadt Altano GmbH Großwallstadt Germany
| | - Encarnación Muñoz
- Tierärztliches Kompetenzzentrum für Pferde Großwallstadt Altano GmbH Großwallstadt Germany
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16
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Draft Genome Sequence of
Helicobacter
sp. Strain CaF467b, Isolated from a Pig Manure Storage Tank. Microbiol Resour Announc 2022; 11:e0025522. [PMID: 35867526 PMCID: PMC9387212 DOI: 10.1128/mra.00255-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
In this report, we present the draft genome sequence of an unclassified Helicobacter strain, CaF467b. This bacterial isolate was recovered from a pig manure storage tank. The draft genome sequence is 1,655,514 bp in length with 1,709 predicted genes and a G+C content of 34.07%.
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17
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Prevalence, diversity and public health implications of Helicobacter species in pet and stray dogs. One Health 2022; 15:100430. [PMID: 36277106 PMCID: PMC9582540 DOI: 10.1016/j.onehlt.2022.100430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 08/27/2022] [Accepted: 08/28/2022] [Indexed: 11/23/2022] Open
Abstract
Background It is probable that humans can acquire H. pylori and non—H. pylori Helicobacter infections via domestic animals. The prevalence and risk factors of infections of Helicobacter species in canines of Taipei city were therefore analysed in this study. Materials and methods A total of 95 canine faecal samples were collected from different animal shelters and hospitals in Taipei city. Total DNA was extracted for semi-nested PCR detection of Helicobacter species. The PCR products were sequenced for further comparative database and phylogenetic analyses. Results The overall prevalence of Helicobacter species in canines of Taipei city was 75.79% (72/95). Two gastric, seven enterohepatic and two unclassified Helicobacter species were identified, all of which have been implicated in the aetiology of human diseases. The predominant species detected included H. canis (27.78%), H. pylori (26.39%), H. canicola (18.06%), and H. bilis (13.89%) in decreasing order, while H. canadensis and H. typhlonius were identified for the first time in canines. The genotypes in H. pylori and H. canicola clusters grouped together, with their respective reference strains, showed a close evolutionary distance in the phylogenetic tree, indicating a common ancestry may have existed in these clusters respectively. The residential region of canines, dog living status (pet or stray) and breed (purebred or mixed-breed) are the risk factors associated with Helicobacter infections in the canines examined. Conclusion The high prevalence of Helicobacter infections in canines highlights a potential public health risk of zoonotic transmission among dogs, humans and other animals, and therefore, the need for proper methods in controlling the transmission routes. In addition, the 16S rRNA gene amplification method was found to be useful for bacterial identification and phylogenetic analysis. The prevalence of Helicobacter infection in dogs of Taipei city was found to be 75.79%. Species detected included H. canis, H. pylori, H. canicola, H. bilis and others, including 2 unclassified species. Almost all the species detected are identical with those reported to be found in humans in some other studies, suggesting possible cross-transmission between humans and canines. Residential region, living status (pet or stray) and breed type of canines are risk factors associated with Helicobacter infections in the canines. Phylogenetic analysis indicated an evolutionary pattern in H. pylori and H. canicola clusters, suggesting a common ancestry may have existed in these clusters respectively.
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18
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Zhang G, Wang J, Zhao Z, Xin T, Fan X, Shen Q, Raheem A, Lee CR, Jiang H, Ding J. Regulated necrosis, a proinflammatory cell death, potentially counteracts pathogenic infections. Cell Death Dis 2022; 13:637. [PMID: 35869043 PMCID: PMC9307826 DOI: 10.1038/s41419-022-05066-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 06/29/2022] [Accepted: 07/04/2022] [Indexed: 02/07/2023]
Abstract
Since the discovery of cell apoptosis, other gene-regulated cell deaths are gradually appreciated, including pyroptosis, ferroptosis, and necroptosis. Necroptosis is, so far, one of the best-characterized regulated necrosis. In response to diverse stimuli (death receptor or toll-like receptor stimulation, pathogenic infection, or other factors), necroptosis is initiated and precisely regulated by the receptor-interacting protein kinase 3 (RIPK3) with the involvement of its partners (RIPK1, TRIF, DAI, or others), ultimately leading to the activation of its downstream substrate, mixed lineage kinase domain-like (MLKL). Necroptosis plays a significant role in the host's defense against pathogenic infections. Although much has been recognized regarding modulatory mechanisms of necroptosis during pathogenic infection, the exact role of necroptosis at different stages of infectious diseases is still being unveiled, e.g., how and when pathogens utilize or evade necroptosis to facilitate their invasion and how hosts manipulate necroptosis to counteract these detrimental effects brought by pathogenic infections and further eliminate the encroaching pathogens. In this review, we summarize and discuss the recent progress in the role of necroptosis during a series of viral, bacterial, and parasitic infections with zoonotic potentials, aiming to provide references and directions for the prevention and control of infectious diseases of both human and animals.
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Affiliation(s)
- Guangzhi Zhang
- grid.464332.4Institute of Animal Sciences of Chinese Academy of Agricultural Sciences, Beijing, 100193 China
| | - Jinyong Wang
- grid.508381.70000 0004 0647 272XShenzhen Bay Laboratory, Institute of Infectious Diseases, Shenzhen, 518000 China ,grid.258164.c0000 0004 1790 3548Institute of Respiratory Diseases, Shenzhen People’s Hospital, The Second Clinical Medical College, Jinan University, Shenzhen, 518020 Guangdong China
| | - Zhanran Zhao
- grid.47840.3f0000 0001 2181 7878Department of Molecular and Cell Biology and Cancer Research Laboratory, University of California, Berkeley, CA 94720-3200 USA
| | - Ting Xin
- grid.464332.4Institute of Animal Sciences of Chinese Academy of Agricultural Sciences, Beijing, 100193 China
| | - Xuezheng Fan
- grid.464332.4Institute of Animal Sciences of Chinese Academy of Agricultural Sciences, Beijing, 100193 China
| | - Qingchun Shen
- grid.464332.4Institute of Animal Sciences of Chinese Academy of Agricultural Sciences, Beijing, 100193 China
| | - Abdul Raheem
- grid.464332.4Institute of Animal Sciences of Chinese Academy of Agricultural Sciences, Beijing, 100193 China ,grid.35155.370000 0004 1790 4137Present Address: Huazhong Agricultural University, Wuhan, China
| | - Chae Rhim Lee
- grid.47840.3f0000 0001 2181 7878Department of Molecular and Cell Biology and Cancer Research Laboratory, University of California, Berkeley, CA 94720-3200 USA ,grid.266093.80000 0001 0668 7243Present Address: University of California, Irvine, CA USA
| | - Hui Jiang
- grid.464332.4Institute of Animal Sciences of Chinese Academy of Agricultural Sciences, Beijing, 100193 China
| | - Jiabo Ding
- grid.464332.4Institute of Animal Sciences of Chinese Academy of Agricultural Sciences, Beijing, 100193 China
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19
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Taillieu E, Chiers K, Amorim I, Gärtner F, Maes D, Van Steenkiste C, Haesebrouck F. Gastric Helicobacter species associated with dogs, cats and pigs: significance for public and animal health. Vet Res 2022; 53:42. [PMID: 35692057 PMCID: PMC9190127 DOI: 10.1186/s13567-022-01059-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Accepted: 05/10/2022] [Indexed: 12/14/2022] Open
Abstract
This article focuses on the pathogenic significance of Helicobacter species naturally colonizing the stomach of dogs, cats and pigs. These gastric "non-Helicobacter (H.) pylori Helicobacter species" (NHPH) are less well-known than the human adapted H. pylori. Helicobacter suis has been associated with gastritis and decreased daily weight gain in pigs. Several studies also attribute a role to this pathogen in the development of hyperkeratosis and ulceration of the non-glandular stratified squamous epithelium of the pars oesophagea of the porcine stomach. The stomach of dogs and cats can be colonized by several Helicobacter species but their pathogenic significance for these animals is probably low. Helicobacter suis as well as several canine and feline gastric Helicobacter species may also infect humans, resulting in gastritis, peptic and duodenal ulcers, and low-grade mucosa-associated lymphoid tissue lymphoma. These agents may be transmitted to humans most likely through direct or indirect contact with dogs, cats and pigs. Additional possible transmission routes include consumption of water and, for H. suis, also consumption of contaminated pork. It has been described that standard H. pylori eradication therapy is usually also effective to eradicate the NHPH in human patients, although acquired antimicrobial resistance may occasionally occur and porcine H. suis strains are intrinsically less susceptible to aminopenicillins than non-human primate H. suis strains and other gastric Helicobacter species. Virulence factors of H. suis and the canine and feline gastric Helicobacter species include urease activity, motility, chemotaxis, adhesins and gamma-glutamyl transpeptidase. These NHPH, however, lack orthologs of cytotoxin-associated gene pathogenicity island and vacuolating cytotoxin A, which are major virulence factors in H. pylori. It can be concluded that besides H. pylori, gastric Helicobacter species associated with dogs, cats and pigs are also clinically relevant in humans. Although recent research has provided better insights regarding pathogenic mechanisms and treatment strategies, a lot remains to be investigated, including true prevalence rates, exact modes of transmission and molecular pathways underlying disease development and progression.
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Affiliation(s)
- Emily Taillieu
- Department of Pathobiology, Pharmacology and Zoological Medicine, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium.
| | - Koen Chiers
- Department of Pathobiology, Pharmacology and Zoological Medicine, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Irina Amorim
- Instituto de Investigação E Inovação Em Saúde (i3S), Universidade Do Porto, Porto, Portugal.,Institute of Pathology and Molecular Immunology, University of Porto (IPATIMUP), Porto, Portugal.,School of Medicine and Biomedical Sciences, Porto University, Porto, Portugal
| | - Fátima Gärtner
- Instituto de Investigação E Inovação Em Saúde (i3S), Universidade Do Porto, Porto, Portugal.,Institute of Pathology and Molecular Immunology, University of Porto (IPATIMUP), Porto, Portugal
| | - Dominiek Maes
- Department of Internal Medicine, Reproduction and Population Medicine, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Christophe Van Steenkiste
- Department of Gastroenterology and Hepatology, University Hospital Antwerp, Antwerp University, Edegem, Belgium.,Department of Gastroenterology and Hepatology, General Hospital Maria Middelares, Ghent, Belgium
| | - Freddy Haesebrouck
- Department of Pathobiology, Pharmacology and Zoological Medicine, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
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20
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Kadota H, Yuge R, Miyamoto R, Otani R, Takigawa H, Hayashi R, Urabe Y, Oka S, Sentani K, Oue N, Kitadai Y, Tanaka S. Investigation of endoscopic findings in nine cases of Helicobacter suis-infected gastritis complicated by gastric mucosa-associated lymphoid tissue lymphoma. Helicobacter 2022; 27:e12887. [PMID: 35363918 DOI: 10.1111/hel.12887] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 03/05/2022] [Accepted: 03/06/2022] [Indexed: 01/16/2023]
Abstract
BACKGROUND We have previously reported that eradication therapy was more effective against Helicobacter pylori (Hp)-negative gastric mucosa-associated lymphoid tissue (MALT) lymphoma in non-Helicobacter pylori Helicobacter (NHPH)-positive cases than in NHPH-negative cases and that the infection status of NHPH could be a predictive marker for the efficacy of eradication therapy for H. pylori negative gastric MALT lymphoma. However, a diagnostic test for NHPH infection has not yet been clinically established. In this study, we investigated the endoscopic findings in cases of H. suis-infected gastritis associated with gastric MALT lymphoma reported at our institution. MATERIALS AND METHODS Participants were selected from cases of gastric MALT lymphoma who underwent esophagogastroduodenoscopy at Hiroshima University Hospital, who were negative for the API2-MALT1 gene, and who received eradication therapy as a first-line treatment. We examined the endoscopic findings in nine cases from this group in which H. suis infection was confirmed by polymerase chain reaction. RESULTS Endoscopic findings, such as cracked mucosa, spotty redness, nodular gastritis-like appearance, and white marbled appearance, which have been reported as characteristics of NHPH gastritis, were observed in multiple cases. The most common endoscopic findings in this study were cracked mucosa (7/9 cases), followed by spotty redness (6/9 cases), nodular gastritis-like appearance (5/9 cases), and white marbled appearance (2/9 cases). CONCLUSIONS Our study may serve as a reference for re-evaluation of the diagnostic criteria for H. suis infection and indications for eradication therapy, particularly for cases of H. pylori negative gastric MALT lymphoma, where endoscopic findings such as those seen in this study were observed in the background mucosa.
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Affiliation(s)
- Hiroki Kadota
- Department of Gastroenterology and Metabolism, Hiroshima University Hospital, Hiroshima, Japan
| | - Ryo Yuge
- Department of Endoscopy, Hiroshima University Hospital, Hiroshima, Japan
| | - Ryo Miyamoto
- Department of Gastroenterology and Metabolism, Hiroshima University Hospital, Hiroshima, Japan
| | - Rina Otani
- Department of Gastroenterology and Metabolism, Hiroshima University Hospital, Hiroshima, Japan
| | - Hidehiko Takigawa
- Department of Endoscopy, Hiroshima University Hospital, Hiroshima, Japan
| | - Ryohei Hayashi
- Department of Endoscopy, Hiroshima University Hospital, Hiroshima, Japan
| | - Yuji Urabe
- Department of Endoscopy, Hiroshima University Hospital, Hiroshima, Japan
| | - Shiro Oka
- Department of Endoscopy, Hiroshima University Hospital, Hiroshima, Japan
| | - Kazuhiro Sentani
- Department of Molecular Pathology, Hiroshima University, Hiroshima, Japan
| | - Naohide Oue
- Department of Molecular Pathology, Hiroshima University, Hiroshima, Japan
| | - Yasuhiko Kitadai
- Department of Health Sciences, Prefectural University of Hiroshima, Hiroshima, Japan
| | - Shinji Tanaka
- Department of Endoscopy, Hiroshima University Hospital, Hiroshima, Japan
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21
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Husnik R, Klimes J, Kovarikova S, Kolorz M. Helicobacter Species and Their Association with Gastric Pathology in a Cohort of Dogs with Chronic Gastrointestinal Signs. Animals (Basel) 2022; 12:ani12101254. [PMID: 35625100 PMCID: PMC9137851 DOI: 10.3390/ani12101254] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2022] [Revised: 05/10/2022] [Accepted: 05/11/2022] [Indexed: 02/06/2023] Open
Abstract
Prevalence of individual Helicobacter species, data evaluating their association with gastric pathology and comparison of accuracy of diagnostic techniques are limited. The aims of this study were to determine the prevalence of gastric Helicobacter species, their association with gastric pathology, and to compare diagnostic techniques. Gastric biopsies from 84 privately-owned dogs with chronic gastrointestinal signs were obtained endoscopically. Helicobacters were detected using PCR, cytology, urease test, and histopathology. PCR detected helicobacters in 71.4% of dogs. Helicobacter heilmannii sensu stricto (s.s.) was the predominant species. Mixed infection was detected in 40% of PCR positive dogs. Gastritis was diagnosed in 38.5% of Helicobacter positive and 47.4% of Helicobacter negative dogs. Mono-infection was associated with 2.4 times increased odds of having more severe inflammation compared to mixed infection. Erosions and ulcers were common endoscopic lesions. Cytology had sensitivity/specificity of 88.3/91.7%. Association between infection and lymphoid follicular hyperplasia was demonstrated.
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Affiliation(s)
- Roman Husnik
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Purdue University, 625 Harrison Street, West Lafayette, IN 47907, USA
- Correspondence:
| | - Jiri Klimes
- Department of Biology and Wildlife Diseases, Faculty of Veterinary Hygiene and Ecology, University of Veterinary Sciences Brno, Palackeho 1/3, 612 42 Brno, Czech Republic;
| | - Simona Kovarikova
- Department of Animal Protection, Welfare and Behavior, Faculty of Veterinary Hygiene and Ecology, University of Veterinary Sciences Brno, Palackeho 1/3, 612 42 Brno, Czech Republic;
| | - Michal Kolorz
- Department of Clinical Pharmacy, University Hospital Martin, 036 01 Martin, Slovakia;
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22
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Helicobacter spp. in the Stomach of Cats: Successful Colonization and Absence of Relevant Histopathological Alterations Reveals High Adaptation to the Host Gastric Niche. Vet Sci 2022; 9:vetsci9050228. [PMID: 35622756 PMCID: PMC9148067 DOI: 10.3390/vetsci9050228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 05/02/2022] [Accepted: 05/08/2022] [Indexed: 02/04/2023] Open
Abstract
In addition to Helicobacter pylori, many non-Helicobacter pylori Helicobacters (NHPH) are able to cause gastric disease in humans. Cats are a natural reservoir for many of these species. Accordingly, living in close and intimate contact with animals has been identified as a risk factor, and an important zoonotic significance has therefore been attributed to NHPH. To determine the prevalence and associated gastric histopathological changes of Helicobacter species, the gastric mucosa of 71 cats were evaluated. Only four presented normal histopathological mucosa with the absence of spiral-shaped organisms. Normal gastric mucosa and the presence of spiral-shaped bacteria were observed in 13 cats. The remaining animals presented histopathological changes representative of gastritis. Helicobacter species were detected in 53 cats (74.6%) by at least one detection method. None of the animals were positive for H. pylori or for H. ailurogastricus. Helicobacter heilmannii organisms were identified in 20 animals, predominantly in the body gastric region. Helicobacter salomonis was the second most prevalent species (57.1%), although it was mainly found in association with other NHPH. Helicobacter felis and H. bizzozeronii were less frequently detected. The great majority of the Helicobacter spp. PCR-positive animals presented normal features regarding fibrosis/mucosal atrophy, neutrophils, eosinophils, or other inflammatory cells and lymphofollicular hyperplasia. Given the controversy and the strong evidence of absence of significant histopathological alterations associated with the presence of Helicobacter spp. in cats, it is possible to hypothesize that these bacteria may be able to adapt to the feline gastric microenvironment or even to comprise part of the gastric microbiome of this animal species. Thus, prudency must be taken when prescribing an antibiotic therapy based solely on the presence of these bacteria in the feline stomach.
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23
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Aydin F, Karakaya E, Kayman T, Abay S, Saticioglu IB. Helicobacter turcicus sp. nov., a catalase-negative new member of the Helicobacter genus, isolated from Anatolian Ground Squirrel (Spermophilus xanthoprymnus) in Turkey. Int J Syst Evol Microbiol 2022; 72. [DOI: 10.1099/ijsem.0.005338] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Eleven Gram-negative, curved and S-shaped, oxidase activity positive, catalase activity negative bacterial isolates recovered from faeces of Anatolian ground squirrel (Spermophilus xanthoprymnus) in the city of Kayseri, Turkey, were subjected to a polyphasic taxonomic study. Results of a genus-specific PCR revealed that these isolates belonged to the genus
Helicobacter
. The 16S rRNA gene sequence analysis revealed that the 11 isolates had over 99 % sequence identity with each other and were most closely related to
Helicobacter ganmani
CMRI H02T with 97.0–97.1 % identity levels and they formed a novel phylogenetic line within the genus
Helicobacter
. Faydin-H64 and Faydin-H70T strains were subjected to gyrA and atpA gene and whole genome sequence analyses. These two
Helicobacter
strains formed separate phylogenetic clades, divergent from other known
Helicobacter
species. The DNA G+C content and genome size of the strain Faydin-H70T were 35.3 mol% and 1.7 Mb, respectively. Average nucleotide identity (ANI) and digital DNA–DNA hybridization (dDDH) values between strain Faydin-H70T and its close phylogenetic neighbour H. winghamensis ATCC BAA-430T were determined as 81.7 and 34.9 %, respectively. Pairwise sequence comparison showed that it was closely related to
H. ganmani
CMRI H02T however it shared the highest ANI and dDDH values with H. winghamensis ATCC BAA-430T. The data obtained from the polyphasic taxonomy approach, including phenotypic characterization and whole-genome sequences, revealed that these strains represent a novel species within the genus
Helicobacter
, for which the name Helicobacter turcicus sp. nov., is proposed with Faydin-H70T as the type strain (=DSM 112556T=LMG 32335T).
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Affiliation(s)
- Fuat Aydin
- Department of Microbiology, Faculty of Veterinary Medicine, Erciyes University, 38280, Kayseri, Turkey
| | - Emre Karakaya
- Department of Microbiology, Faculty of Veterinary Medicine, Erciyes University, 38280, Kayseri, Turkey
| | - Tuba Kayman
- Medical Microbiology Clinic, Şişli Hamidiye Etfal Training and Research Hospital, University of Health Sciences, 34371 Istanbul, Turkey
| | - Secil Abay
- Department of Microbiology, Faculty of Veterinary Medicine, Erciyes University, 38280, Kayseri, Turkey
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24
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Aydin F, Saticioglu IB, Ay H, Kayman T, Karakaya E, Abay S. Description of the two novel species of the genus Helicobacter: Helicobacter anatolicus sp. nov., and Helicobacter kayseriensis sp. nov., isolated from feces of urban wild birds. Syst Appl Microbiol 2022; 45:126326. [DOI: 10.1016/j.syapm.2022.126326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 04/22/2022] [Accepted: 04/27/2022] [Indexed: 10/18/2022]
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25
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Clinical aspects of Helicobacter heilmannii-associated gastritis in patients with dyspepsia: A systematic review and meta-analysis. Microb Pathog 2022; 166:105518. [PMID: 35405277 DOI: 10.1016/j.micpath.2022.105518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 04/01/2022] [Accepted: 04/05/2022] [Indexed: 02/08/2023]
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26
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Yasuda T, Lee HS, Nam SY, Katoh H, Ishibashi Y, Yamagata Murayama S, Matsui H, Masuda H, Rimbara E, Sakurazawa N, Suzuki H, Yoshida H, Seto Y, Ishikawa S, Jeon SW, Nakamura M, Nomura S. Non-Helicobacter pylori Helicobacter (NHPH) positive gastric cancer. Sci Rep 2022; 12:4811. [PMID: 35314746 PMCID: PMC8938428 DOI: 10.1038/s41598-022-08962-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Accepted: 03/14/2022] [Indexed: 12/28/2022] Open
Abstract
Genetic analysis and culturing techniques for gastric non-Helicobacter pylori Helicobacter (NHPH) are progressing. NHPH is reported to accompany nodular gastritis, gastric MALT lymphoma, and mild gastritis. However, only a few gastric cancer cases infected by NHPH have been reported. PCR analysis specific for NHPH and H. pylori was performed for DNA from gastric mucosa of 282 Korean gastric cancer patients, who were treated with endoscopic submucosal dissection. For more precise strain detection of NHPH, NHPH-positive mucosa was stained by immunohistochemistry specific for Helicobacter suis. The Cancer Genome Atlas (TCGA) classification was analyzed for these 3 gastric cancer sub-groups by in situ hybridization and immunohistochemistry. Among 281 patients, 3 patients (1.1%) were positive for NHPH. One patient (Patient 1) was also positive for H. pylori by PCR, another patient (Patient 3) was positive for serum IgG for H. pylori, and the other patient (Patient 2) had no evidence for H. pylori infection. Gastric mucosa of Patients 2 and 3 were positive for H. suis staining. All three NHPH-positive gastric cancers were located in the antrum, and belonged to the Chromosomal Instability Type of TCGA classification. Gastric NHPH can be a cause of gastric cancer, although likely with lower pathogenesis than H. pylori.
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Affiliation(s)
- Tomohiko Yasuda
- Department of Gastrointestinal Surgery, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.,Department of Gastrointestinal Surgery, Nippon Medical School Chiba Hokusoh Hospital, Chiba, Japan
| | - Hyun Seok Lee
- Department of Internal Medicine, School of Medicine, Kyungpook National University, Kyungpook National University Hospital, Daegu, Korea
| | - Su Youn Nam
- Department of Internal Medicine, School of Medicine, Kyungpook National University, Kyungpook National University Hospital, Daegu, Korea
| | - Hiroto Katoh
- Department of Preventive Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Yuko Ishibashi
- Department of Breast and Endocrine Surgery, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
| | - Somay Yamagata Murayama
- Department of Chemotherapy and Mycoses, National Institute of Infectious Diseases, Tokyo, Japan
| | - Hidenori Matsui
- Omura Satoshi Memorial Institute, Kitasato University, Tokyo, Japan
| | - Hiroki Masuda
- Department of Gastrointestinal Surgery, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.,Department of Gastrointestinal and Hepato-Biliary-Pancreatic Surgery, Nippon Medical School, Tokyo, Japan
| | - Emiko Rimbara
- Department of Bacteriology II, National Institute of Infectious Diseases, Tokyo, Japan
| | - Nobuyuki Sakurazawa
- Department of Gastrointestinal Surgery, Nippon Medical School Chiba Hokusoh Hospital, Chiba, Japan
| | - Hideyuki Suzuki
- Department of Gastrointestinal Surgery, Nippon Medical School Chiba Hokusoh Hospital, Chiba, Japan
| | - Hiroshi Yoshida
- Department of Gastrointestinal and Hepato-Biliary-Pancreatic Surgery, Nippon Medical School, Tokyo, Japan
| | - Yasuyuki Seto
- Department of Gastrointestinal Surgery, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Shumpei Ishikawa
- Department of Preventive Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Seong Woo Jeon
- Department of Internal Medicine, School of Medicine, Kyungpook National University, Kyungpook National University Hospital, Daegu, Korea
| | | | - Sachiyo Nomura
- Department of Gastrointestinal Surgery, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.
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27
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Fatemi Khader M, Pourmahdi Borujeni M, Moori Bakhtiari N, Avizeh R. An exploratory study on the presence of
Helicobacter heilmannii
and
Helicobacter billis
in the faces of companion dogs. Vet Med Sci 2022; 8:537-545. [PMID: 35152551 PMCID: PMC8959293 DOI: 10.1002/vms3.765] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Background Companion animals like dogs play an important role in the lives of many people and are often considered to be members of families, but definitely, any contact with them poses an inherent risk of transmitting zoonotic pathogens. One of these pathogens is the genus Helicobacter which is linked to many disorders in human and animal. Objectives The aim of this study was to investigate the presence of some zoonotic species of genus Helicobacter in companion dogs. Results Through culturing in a special medium, nine samples (9%) were detected as infected (two pure and seven mixed culture). Based on multiplex‐PCR, 13 samples (13%) were infected by Helicobacter spp. although none of them were infected by H. pylori. Species‐specific PCR indicated that 38.5% or 5/13 of the samples were infected with H. heilmannii, while 15.45% or 2/13 of the samples were infected by H. billis. Multivariate logistic regression analysis showed that the age factor had a significant effect on Helicobacter spp. infection (odds ratio [OR] = 2.42, p = 0.01). Conclusion This study revealed the negligible faecal transmission of H. pylori. Moreover, due to the detection of H. Heilmannii and H. billis in feces and their association with human gastric diseases, dog owners should be educated about the risks and transmission modes of zoonotic bacterial infections of dogs.
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Affiliation(s)
- Mahdi Fatemi Khader
- Department of Food Hygiene, Faculty of Veterinary Medicine Shahid Chamran University of Ahvaz Ahvaz Iran
| | - Mahdi Pourmahdi Borujeni
- Department of Food Hygiene, Faculty of Veterinary Medicine Shahid Chamran University of Ahvaz Ahvaz Iran
| | - Naghmeh Moori Bakhtiari
- Department of Pathobiology, Faculty of Veterinary Medicine Shahid Chamran University of Ahvaz Ahvaz Iran
| | - Reza Avizeh
- Department of Clinical Sciences, Faculty of Veterinary Medicine Shahid Chamran University of Ahvaz Ahvaz Iran
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28
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Matos R, Sousa HS, Nogueiro J, Magalhães A, Reis CA, Carneiro F, Amorim I, Haesebrouck F, Gärtner F. Helicobacter species binding to the human gastric mucosa. Helicobacter 2022; 27:e12867. [PMID: 34967491 DOI: 10.1111/hel.12867] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 11/30/2021] [Accepted: 12/07/2021] [Indexed: 02/06/2023]
Abstract
Helicobacter pylori infects half of the world population, being associated with several gastric disorders, such as chronic gastritis and gastric carcinoma. The Helicobacter genus also includes other gastric helicobacters, such as H. heilmannii¸ H. ailurogastricus, H. suis, H. felis, H. bizzozeronii, and H. salomonis. These gastric helicobacters colonize both the human and animal stomach. The prevalence of gastric non-Helicobacter pylori Helicobacter (NHPH) species in humans has been described as low, and the in vitro binding to the human gastric mucosa was never assessed. Herein, human gastric tissue sections were used for the evaluation of the tissue glycophenotype and for the binding of gastric NHPH strains belonging to different species. Histopathological evaluation showed that 37.5% of the patients enrolled in our cohort presented chronic gastritis, while the presence of neutrophil or eosinophilic activity (chronic active gastritis) was observed in 62.5% of the patients. The secretor phenotype was observed in 68.8% of the individuals, based on the expression of Lewis B antigen and binding of the UleX lectin. The in vitro binding assay showed that all the NHPH strains evaluated were able to bind, albeit in low frequency, to the human gastric mucosa. The H. heilmannii, H. bizzozeronii, and H. salomonis strains displayed the highest binding ability both to the gastric superficial epithelium and to the deep glands. Interestingly, we observed binding of NHPH to the gastric mucosa of individuals with severe chronic inflammation and intestinal metaplasia, suggesting that NHPH binding may not be restricted to the healthy gastric mucosa or slight chronic gastritis. Furthermore, the in vitro binding of NHPH strains was observed both in secretor and non-secretor individuals in a similar frequency. In conclusion, this study is the first report of the in vitro binding ability of gastric NHPH species to the human gastric mucosa. The results suggest that other glycans, besides the Lewis antigens, could be involved in the bacterial adhesion mechanism; however, the molecular intervenients remain unknown.
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Affiliation(s)
- Rita Matos
- Instituto de Investigação e Inovação em Saúde (i3S), Universidade do Porto, Porto, Portugal.,Instituto de Patologia e Imunologia Molecular da Universidade do Porto (IPATIMUP), Porto, Portugal.,Instituto de Ciências Biomédicas Abel Salazar da Universidade do Porto (ICBAS), Porto, Portugal
| | - Hugo Santos Sousa
- Instituto de Investigação e Inovação em Saúde (i3S), Universidade do Porto, Porto, Portugal.,Centro Hospitalar Universitário de São João (CHUSJ), Porto, Portugal
| | - Jorge Nogueiro
- Centro Hospitalar Universitário de São João (CHUSJ), Porto, Portugal.,Faculdade de Medicina da Universidade do Porto (FMUP), Porto, Portugal
| | - Ana Magalhães
- Instituto de Investigação e Inovação em Saúde (i3S), Universidade do Porto, Porto, Portugal.,Instituto de Patologia e Imunologia Molecular da Universidade do Porto (IPATIMUP), Porto, Portugal.,Instituto de Ciências Biomédicas Abel Salazar da Universidade do Porto (ICBAS), Porto, Portugal
| | - Celso A Reis
- Instituto de Investigação e Inovação em Saúde (i3S), Universidade do Porto, Porto, Portugal.,Instituto de Patologia e Imunologia Molecular da Universidade do Porto (IPATIMUP), Porto, Portugal.,Instituto de Ciências Biomédicas Abel Salazar da Universidade do Porto (ICBAS), Porto, Portugal.,Faculdade de Medicina da Universidade do Porto (FMUP), Porto, Portugal
| | - Fátima Carneiro
- Instituto de Investigação e Inovação em Saúde (i3S), Universidade do Porto, Porto, Portugal.,Instituto de Patologia e Imunologia Molecular da Universidade do Porto (IPATIMUP), Porto, Portugal.,Centro Hospitalar Universitário de São João (CHUSJ), Porto, Portugal.,Faculdade de Medicina da Universidade do Porto (FMUP), Porto, Portugal
| | - Irina Amorim
- Instituto de Investigação e Inovação em Saúde (i3S), Universidade do Porto, Porto, Portugal.,Instituto de Patologia e Imunologia Molecular da Universidade do Porto (IPATIMUP), Porto, Portugal.,Instituto de Ciências Biomédicas Abel Salazar da Universidade do Porto (ICBAS), Porto, Portugal
| | - Freddy Haesebrouck
- Department of Pathobiology, Pharmacology and Zoological Medicine, Faculty of Veterinary Medicine, Ghent University, Belgium
| | - Fátima Gärtner
- Instituto de Investigação e Inovação em Saúde (i3S), Universidade do Porto, Porto, Portugal.,Instituto de Patologia e Imunologia Molecular da Universidade do Porto (IPATIMUP), Porto, Portugal
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29
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Presence of Helicobacter Species in Gastric Mucosa of Human Patients and Outcome of Helicobacter Eradication Treatment. J Pers Med 2022; 12:jpm12020181. [PMID: 35207669 PMCID: PMC8879780 DOI: 10.3390/jpm12020181] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 01/06/2022] [Accepted: 01/24/2022] [Indexed: 12/11/2022] Open
Abstract
The genus Helicobacter is composed of bacteria that colonize both the human and animal gastrointestinal tract. Helicobacter pylori infects half of the world’s population, causing various disorders, such as gastritis, duodenitis and gastric cancer. Additionally, non-Helicobacter pylori Helicobacter species (NHPH) are commonly found in the stomach of pigs, dogs and cats. Most of these species have zoonotic potential and prevalence rates of 0.2–6.0%, and have been described in human patients suffering from gastric disorders undergoing a gastric biopsy. The aim of this study was to determine the occurrence of Helicobacter spp. in the stomach of patients with gastric cancer (n = 17) and obese (n = 63) patients. Furthermore, the outcome of the Helicobacter eradication treatment and the current infection status was evaluated. Overall, based on the genus-specific PCR followed by sequencing, DNA from Helicobacter spp. was detected in 46.3% of the patients, including single infections with H. pylori in 43.8% of the patients and mixed infections with H. pylori and canine- or feline-associated H. felis in 2.5%. About 32.5% of the patients had been subjected to previous Helicobacter eradication therapy and the triple standard therapy was the most frequent scheme (42.3%). In 48.0% of the patients who received eradication treatment, bacteria were still detected, including one mixed infection. In 23.1% of the patients who reported that a subsequent test had been performed to confirm the elimination of the bacteria, Helicobacter were still detected. In conclusion, although in a smaller percentage, NHPH may also be present in the human stomach. Thus, specific NHPH screening should be included in the diagnostic routine. The continued presence of H. pylori in the stomach of patients recently subjected to eradication schemes raises questions about the efficacy of the current Helicobacter treatments.
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30
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A Cross-Sectional Study of Knowledge on Ownership, Zoonoses and Practices among Pet Owners in Northern Portugal. Animals (Basel) 2021; 11:ani11123543. [PMID: 34944317 PMCID: PMC8697889 DOI: 10.3390/ani11123543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 12/09/2021] [Accepted: 12/11/2021] [Indexed: 11/17/2022] Open
Abstract
Simple Summary Pet ownership is common in most countries, but few published studies have addressed pet owners’ knowledge of zoonoses, pet contact practices, or awareness of zoonotic disease risks posed by pets. The aim of this study was to assess household knowledge, attitudes, and risks related to pet ownership and zoonoses in northern Portugal. A questionnaire was developed to gather information regarding participants’ demographic characteristics; household pet types and their importance to the family; pet contact-related attitudes; knowledge of zoonoses, high-risk groups, disease transmission pathways, and disease protection measures. It was observed that most participants considered pets an important part of the family. Nevertheless, high-risk practices were recurrent and pet owners’ knowledge was limited. These results reinforce the importance of further studies to better understand the existing gaps in knowledge of pet ownership and zoonoses and strengthens the need to adopt the One Health concept. Abstract Pet ownership is common in modern society. In Portugal, 38% and 31% of all households own at least one dog or cat, respectively. Few studies have ascertained the knowledge of pet owners on pet ownership and zoonoses, and none have been carried out in Portugal. The aim of the present study was to assess household knowledge and practices related to pet ownership and zoonoses in northern Portugal. A face-to-face questionnaire was completed by 424 pet owners, from November 2019 to February 2020. Most respondents (97.2%) considered pets as an important part of the family, especially women (p = 0.036); 73.1% allowed their pets to live an indoor/outdoor life; 41.3% denied sharing the bed with their pets while 29% assumed they did it daily; 20.3% reported never kissing their pets/pets licking their faces. Furthermore, 73.6% considered animals as potential sources of human diseases, but only 25.9% reported knowing the definition of zoonoses; 96.9% considered the role of veterinarians important in protecting public health. The low level of knowledge of pet owners and the occurrence of high-risk behaviors indicates a need to strengthen communication between veterinarians, physicians, pet owners, and the general public towards reduce the risk of acquisition and transmission of zoonoses.
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31
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Berlamont H, Bruggeman A, Bauwens E, Vandendriessche C, Clarebout E, Xie J, De Bruyckere S, Van Imschoot G, Van Wonterghem E, Ducatelle R, Santens P, Smet A, Haesebrouck F, Vandenbroucke RE. Gastric Helicobacter suis Infection Partially Protects against Neurotoxicity in A 6-OHDA Parkinson's Disease Mouse Model. Int J Mol Sci 2021; 22:ijms222111328. [PMID: 34768765 PMCID: PMC8582972 DOI: 10.3390/ijms222111328] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 10/12/2021] [Accepted: 10/14/2021] [Indexed: 12/21/2022] Open
Abstract
The exact etiology of Parkinson’s disease (PD) remains largely unknown, but more and more research suggests the involvement of the gut microbiota. Interestingly, idiopathic PD patients were shown to have at least a 10 times higher prevalence of Helicobacter suis (H. suis) DNA in gastric biopsies compared to control patients. H. suis is a zoonotic Helicobacter species that naturally colonizes the stomach of pigs and non-human primates but can be transmitted to humans. Here, we investigated the influence of a gastric H. suis infection on PD disease progression through a 6-hydroxydopamine (6-OHDA) mouse model. Therefore, mice with either a short- or long-term H. suis infection were stereotactically injected with 6-OHDA in the left striatum and sampled one week later. Remarkably, a reduced loss of dopaminergic neurons was seen in the H. suis/6-OHDA groups compared to the control/6-OHDA groups. Correspondingly, motor function of the H. suis-infected 6-OHDA mice was superior to that in the non-infected 6-OHDA mice. Interestingly, we also observed higher expression levels of antioxidant genes in brain tissue from H. suis-infected 6-OHDA mice, as a potential explanation for the reduced 6-OHDA-induced cell loss. Our data support an unexpected neuroprotective effect of gastric H. suis on PD pathology, mediated through changes in oxidative stress.
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Affiliation(s)
- Helena Berlamont
- Department of Pathobiology, Pharmacology and Zoological Medicine, Faculty of Veterinary Medicine, Ghent University, 9820 Merelbeke, Belgium; (H.B.); (E.B.); (S.D.B.); (R.D.); (F.H.)
| | - Arnout Bruggeman
- VIB Center for Inflammation Research, 9052 Ghent, Belgium; (A.B.); (C.V.); (E.C.); (J.X.); (G.V.I.); (E.V.W.)
- Department of Biomedical Molecular Biology, Ghent University, 9052 Ghent, Belgium
- Department of Neurology, Ghent University Hospital, 9000 Ghent, Belgium;
| | - Eva Bauwens
- Department of Pathobiology, Pharmacology and Zoological Medicine, Faculty of Veterinary Medicine, Ghent University, 9820 Merelbeke, Belgium; (H.B.); (E.B.); (S.D.B.); (R.D.); (F.H.)
| | - Charysse Vandendriessche
- VIB Center for Inflammation Research, 9052 Ghent, Belgium; (A.B.); (C.V.); (E.C.); (J.X.); (G.V.I.); (E.V.W.)
- Department of Biomedical Molecular Biology, Ghent University, 9052 Ghent, Belgium
| | - Elien Clarebout
- VIB Center for Inflammation Research, 9052 Ghent, Belgium; (A.B.); (C.V.); (E.C.); (J.X.); (G.V.I.); (E.V.W.)
- Department of Biomedical Molecular Biology, Ghent University, 9052 Ghent, Belgium
| | - Junhua Xie
- VIB Center for Inflammation Research, 9052 Ghent, Belgium; (A.B.); (C.V.); (E.C.); (J.X.); (G.V.I.); (E.V.W.)
- Department of Biomedical Molecular Biology, Ghent University, 9052 Ghent, Belgium
| | - Sofie De Bruyckere
- Department of Pathobiology, Pharmacology and Zoological Medicine, Faculty of Veterinary Medicine, Ghent University, 9820 Merelbeke, Belgium; (H.B.); (E.B.); (S.D.B.); (R.D.); (F.H.)
| | - Griet Van Imschoot
- VIB Center for Inflammation Research, 9052 Ghent, Belgium; (A.B.); (C.V.); (E.C.); (J.X.); (G.V.I.); (E.V.W.)
- Department of Biomedical Molecular Biology, Ghent University, 9052 Ghent, Belgium
| | - Elien Van Wonterghem
- VIB Center for Inflammation Research, 9052 Ghent, Belgium; (A.B.); (C.V.); (E.C.); (J.X.); (G.V.I.); (E.V.W.)
- Department of Biomedical Molecular Biology, Ghent University, 9052 Ghent, Belgium
| | - Richard Ducatelle
- Department of Pathobiology, Pharmacology and Zoological Medicine, Faculty of Veterinary Medicine, Ghent University, 9820 Merelbeke, Belgium; (H.B.); (E.B.); (S.D.B.); (R.D.); (F.H.)
| | - Patrick Santens
- Department of Neurology, Ghent University Hospital, 9000 Ghent, Belgium;
| | - Annemieke Smet
- Laboratory of Experimental Medicine and Pediatrics, Faculty of Medicine and Health Sciences, University of Antwerp, 2610 Antwerp, Belgium;
| | - Freddy Haesebrouck
- Department of Pathobiology, Pharmacology and Zoological Medicine, Faculty of Veterinary Medicine, Ghent University, 9820 Merelbeke, Belgium; (H.B.); (E.B.); (S.D.B.); (R.D.); (F.H.)
| | - Roosmarijn E. Vandenbroucke
- VIB Center for Inflammation Research, 9052 Ghent, Belgium; (A.B.); (C.V.); (E.C.); (J.X.); (G.V.I.); (E.V.W.)
- Department of Biomedical Molecular Biology, Ghent University, 9052 Ghent, Belgium
- Correspondence: ; Tel.: +32-9-3313730
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Geng C, Vemulapalli R. Helicobacter heilmannii Infection: Dog-Derived Dyspepsia? Am J Med 2021; 134:e518-e519. [PMID: 34043977 DOI: 10.1016/j.amjmed.2021.04.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 04/20/2021] [Accepted: 04/25/2021] [Indexed: 11/17/2022]
Affiliation(s)
- Calvin Geng
- University of Texas Southwestern Medical School, Dallas
| | - Roopa Vemulapalli
- Department of Internal Medicine, Division of Digestive & Liver Diseases, University of Texas Southwestern Medical Center, Dallas.
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Takigawa H, Yuge R, Masaki S, Otani R, Kadota H, Naito T, Hayashi R, Urabe Y, Oka S, Tanaka S, Chayama K, Kitadai Y. Involvement of non-Helicobacter pylori helicobacter infections in Helicobacter pylori-negative gastric MALT lymphoma pathogenesis and efficacy of eradication therapy. Gastric Cancer 2021; 24:937-945. [PMID: 33638751 DOI: 10.1007/s10120-021-01172-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2020] [Accepted: 02/12/2021] [Indexed: 02/06/2023]
Abstract
BACKGROUND Eradication therapy is known to be effective against Helicobacter pylori-positive gastric MALT lymphoma but predicting the efficacy of eradication therapy against Helicobacter pylori-negative gastric MALT lymphoma is difficult. Recent reports have shown that non-Helicobacter pylori helicobacter infections induce gastric MALT lymphoma, and we aimed to clarify whether non-Helicobacter pylori helicobacter infections are associated with the efficacy of eradication therapy. METHODS We analyzed eradication therapy as a first-line treatment for 182 cases of gastric MALT lymphoma, classified according to Helicobacter pylori infection and API2-MALT1 mutation status. We also evaluated the non-Helicobacter pylori helicobacter infection status in 29 Helicobacter pylori-negative cases via PCR with DNA extracted from paraffin-embedded biopsy tissues. Finally, we analyzed the relationship between non-Helicobacter pylori helicobacter infection status and eradication therapy outcome. RESULTS The API2-MALT1 mutation was observed in 13/182 patients (7.1%), none of whom were cured by eradication therapy. Helicobacter pylori-negative cases had a significantly higher non-Helicobacter pylori helicobacter infection rate than Helicobacter pylori-positive cases (16/29, 55% vs. 3/29, 10%; P < 0.05). Among the Helicobacter pylori-negative cases, non-Helicobacter pylori helicobacter-positive cases had a significantly higher complete response rate than non-Helicobacter pylori helicobacter-negative cases (12/16, 75% vs. 3/13, 23%; P < 0.05). CONCLUSION Helicobacter pylori-negative and API2-MALT1-negative gastric MALT lymphoma cases exhibited a high rate of non-Helicobacter pylori helicobacter infections, which may have contributed to the success of eradication therapy. Therefore, we recommend eradication therapy as a first-line treatment for non-Helicobacter pylori helicobacter-positive gastric MALT lymphoma.
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Affiliation(s)
- Hidehiko Takigawa
- Department of Endoscopy, Hiroshima University Hospital, Hiroshima, 734-0037, Japan
| | - Ryo Yuge
- Department of Endoscopy, Hiroshima University Hospital, Hiroshima, 734-0037, Japan
| | - Satoshi Masaki
- Department of Health and Science, Prefectural University of Hiroshima, 1-1-71, Ujinahigashi, Minami-ku, Hiroshima, 734-8558, Japan
| | - Rina Otani
- Department of Gastroenterology and Metabolism, Hiroshima University, Hiroshima, 734-0037, Japan
| | - Hiroki Kadota
- Department of Gastroenterology and Metabolism, Hiroshima University, Hiroshima, 734-0037, Japan
| | - Toshikatsu Naito
- Department of Gastroenterology and Metabolism, Hiroshima University, Hiroshima, 734-0037, Japan
| | - Ryohei Hayashi
- Department of Endoscopy, Hiroshima University Hospital, Hiroshima, 734-0037, Japan
| | - Yuji Urabe
- Division of Regeneration and Medicine Center for Translational and Clinical Research, Hiroshima University Hospital, Hiroshima, 734-0037, Japan
| | - Shiro Oka
- Department of Gastroenterology and Metabolism, Hiroshima University, Hiroshima, 734-0037, Japan
| | - Shinji Tanaka
- Department of Endoscopy, Hiroshima University Hospital, Hiroshima, 734-0037, Japan
| | - Kazuaki Chayama
- Department of Gastroenterology and Metabolism, Hiroshima University, Hiroshima, 734-0037, Japan
| | - Yasuhiko Kitadai
- Department of Health and Science, Prefectural University of Hiroshima, 1-1-71, Ujinahigashi, Minami-ku, Hiroshima, 734-8558, Japan.
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Muhangi D, Gardiner CH, Ojok L, Cranfield MR, Gilardi KVK, Mudakikwa AB, Lowenstine LJ. Pathological lesions of the digestive tract in free-ranging mountain gorillas (Gorilla beringei beringei). Am J Primatol 2021; 83:e23290. [PMID: 34096629 DOI: 10.1002/ajp.23290] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 05/06/2021] [Accepted: 05/22/2021] [Indexed: 11/10/2022]
Abstract
The finding of parasites and bacterial pathogens in mountain gorilla feces and oral lesions in gorilla skeletal remains has not been linked to pathological evidence of morbidity or mortality. In the current study, we conducted a retrospective study of digestive tracts including oral cavity, salivary glands, esophagus, stomach, intestines (gastrointestinal tract [GI]), liver, and pancreas of 60 free-ranging mountain gorillas from Uganda, Rwanda, and the Democratic Republic of Congo that died between 1985 and 2007. We reviewed clinical histories and gross pathology reports and examined histological sections. On histology, enteritis (58.6%), gastritis (37.3%), and colitis (29.3%) were the commonest lesions in the tracts. Enteritis and colitis were generally mild, and judged likely to have been subclinical. Gastritis was often chronic and proliferative or ulcerative, and associated with nematodiasis. A gastro-duodenal malignancy (carcinoid) was present in one animal. A number of incidental lesions were identified throughout the tract and cestodes and nematodes were frequently observed grossly and/or histologically. Pigmentation of teeth and tongue were a common finding, but periodontitis and dental attrition were less common than reported from past studies of skeletal remains. Despite observing numerous GI lesions and parasites in this study of deceased free-living mountain gorillas, we confirmed mortality attributable to gastroenteritis in just 8% (5/60) cases, which is less than that described in captive gorillas. Other deaths attributed to digestive tract lesions included cleft palate in an infant, periodontal disease causing systemic infection in an older adult and gastric cancer. Of all the parasitic infections observed, only hepatic capillariasis and gastric nematodiasis were significantly associated with lesions (hepatitis and gastritis, respectively). Understanding GI lesions in this endangered species is key in the management of morbidity associated with GI ailments.
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Affiliation(s)
- Denis Muhangi
- Department of Wildlife and Aquatic Resources Management, School of Veterinary Medicine and Animal Resources, College of Veterinary Medicine, Animal Resources and Biosecurity, Makerere University, Kampala, Uganda
| | - Chris H Gardiner
- Veterinary Pathology Service, Joint Pathology Center, Silver Spring, Maryland, USA
| | - Lonzy Ojok
- School of Biolaboratory Sciences, College of Veterinary Medicine, Animal Resources and Biosecurity, Makerere University, Kampala, Uganda.,Department of Pathology, Faculty of Medicine, Gulu University, Gulu, Uganda
| | - Michael R Cranfield
- Gorilla Doctors, MGVP, Inc. and Karen C. Drayer Wildlife Health Center, University of California-Davis, Davis, California, USA
| | - Kirsten V K Gilardi
- Gorilla Doctors, MGVP, Inc. and Karen C. Drayer Wildlife Health Center, University of California-Davis, Davis, California, USA
| | | | - Linda J Lowenstine
- Department of Pathology, Microbiology and Immunology, School of Veterinary Medicine, University of California-Davis, Davis, California, USA
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Kubota-Aizawa S, Matsubara Y, Kanemoto H, Mimuro H, Uchida K, Chambers J, Tsuboi M, Ohno K, Fukushima K, Kato N, Yotsuyanagi H, Tsujimoto H. Transmission of Helicobacter pylori between a human and two dogs: A case report. Helicobacter 2021; 26:e12798. [PMID: 33818862 DOI: 10.1111/hel.12798] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2020] [Accepted: 02/24/2021] [Indexed: 12/12/2022]
Abstract
BACKGROUND Whereas non-Helicobacter pylori helicobacters, which are frequently detected in the stomachs of dogs and cats as a source of zoonoses, have attracted considerable attention, the role of pets in H. pylori epidemiology is unclear. In our previous study, an H. pylori infection was detected in the stomach of a dog (Dog 1). Here, we investigated the H. pylori infection status in the female offspring of Dog 1 (Dog 2) and its owner within the same household. MATERIALS AND METHODS Biopsy specimens were obtained from the dog's owner and tested for H. pylori. DNA from gastric biopsy samples of Dog 1, gastric fluid sediment of Dog 2, and bacteria from the stomach of the owner was obtained, and Helicobacter genus- and species-specific PCRs were performed. Then, sequence analyses of the partial region of the ureAB gene were conducted. RESULTS Samples from both dogs and the owner reacted positively in the genus-specific PCR and negative in the Helicobacter felis-, Helicobacter bizzozeronii-, and Helicobacter heilmannii sensu stricto-specific PCRs. All three samples also reacted positively in the H. pylori-specific PCR. Sequences of the partial ureAB gene from all subjects were identical. CONCLUSIONS The results suggested that the two dogs and their owner were infected with an identical H. pylori strain. This report is the first to demonstrate that H. pylori can be transmitted between humans and dogs. Further studies are required to investigate the risk factors for the transmission of H. pylori between humans and dogs from the perspective of preventive epidemiology.
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Affiliation(s)
- Sanae Kubota-Aizawa
- Department of Veterinary Internal Medicine, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Yasuo Matsubara
- Department of General Medicine, IMSUT Hospital, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Hideyuki Kanemoto
- Department of Veterinary Internal Medicine, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Hitomi Mimuro
- Department of Infection Microbiology, Research Institute for Microbial Diseases, Osaka University, Osaka, Japan.,Department of Infectious Diseases Control, International Research Center for Infectious Diseases, The Institute of Medical Science, University of Tokyo, Tokyo, Japan
| | - Kazuyuki Uchida
- Department of Veterinary Pathology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - James Chambers
- Department of Veterinary Pathology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Masaya Tsuboi
- Department of Veterinary Pathology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Koichi Ohno
- Department of Veterinary Internal Medicine, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Kenjiro Fukushima
- Department of Veterinary Internal Medicine, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Naoya Kato
- Department of Gastroenterology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Hiroshi Yotsuyanagi
- Department of General Medicine, IMSUT Hospital, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Hajime Tsujimoto
- Department of Veterinary Internal Medicine, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
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Matos R, Amorim I, Magalhães A, Haesebrouck F, Gärtner F, Reis CA. Adhesion of Helicobacter Species to the Human Gastric Mucosa: A Deep Look Into Glycans Role. Front Mol Biosci 2021; 8:656439. [PMID: 34026832 PMCID: PMC8138122 DOI: 10.3389/fmolb.2021.656439] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 04/22/2021] [Indexed: 12/15/2022] Open
Abstract
Helicobacter species infections may be associated with the development of gastric disorders, such as gastritis, peptic ulcers, intestinal metaplasia, dysplasia and gastric carcinoma. Binding of these bacteria to the gastric mucosa occurs through the recognition of specific glycan receptors expressed by the host epithelial cells. This review addresses the state of the art knowledge on these host glycan structures and the bacterial adhesins involved in Helicobacter spp. adhesion to gastric mucosa colonization. Glycans are expressed on every cell surface and they are crucial for several biological processes, including protein folding, cell signaling and recognition, and host-pathogen interactions. Helicobacter pylori is the most predominant gastric Helicobacter species in humans. The adhesion of this bacterium to glycan epitopes present on the gastric epithelial surface is a crucial step for a successful colonization. Major adhesins essential for colonization and infection are the blood-group antigen-binding adhesin (BabA) which mediates the interaction with fucosylated H-type 1 and Lewis B glycans, and the sialic acid-binding adhesin (SabA) which recognizes the sialyl-Lewis A and X glycan antigens. Since not every H. pylori strain expresses functional BabA or SabA adhesins, other bacterial proteins are most probably also involved in this adhesion process, including LabA (LacdiNAc-binding adhesin), which binds to the LacdiNAc motif on MUC5AC mucin. Besides H. pylori, several other gastric non-Helicobacter pylori Helicobacters (NHPH), mainly associated with pigs (H. suis) and pets (H. felis, H. bizzozeronii, H. salomonis, and H. heilmannii), may also colonize the human stomach and cause gastric disease, including gastritis, peptic ulcers and mucosa-associated lymphoid tissue (MALT) lymphoma. These NHPH lack homologous to the major known adhesins involved in colonization of the human stomach. In humans, NHPH infection rate is much lower than in the natural hosts. Differences in the glycosylation profile between gastric human and animal mucins acting as glycan receptors for NHPH-associated adhesins, may be involved. The identification and characterization of the key molecules involved in the adhesion of gastric Helicobacter species to the gastric mucosa is important to understand the colonization and infection strategies displayed by different members of this genus.
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Affiliation(s)
- Rita Matos
- Instituto de Investigação e Inovação Em Saúde (i3S), Universidade do Porto, Porto, Portugal
- Instituto de Patologia e Imunologia Molecular da Universidade do Porto (IPATIMUP), Porto, Portugal
- Instituto de Ciências Biomédicas Abel Salazar da Universidade do Porto (ICBAS), Porto, Portugal
| | - Irina Amorim
- Instituto de Investigação e Inovação Em Saúde (i3S), Universidade do Porto, Porto, Portugal
- Instituto de Patologia e Imunologia Molecular da Universidade do Porto (IPATIMUP), Porto, Portugal
- Instituto de Ciências Biomédicas Abel Salazar da Universidade do Porto (ICBAS), Porto, Portugal
| | - Ana Magalhães
- Instituto de Investigação e Inovação Em Saúde (i3S), Universidade do Porto, Porto, Portugal
- Instituto de Patologia e Imunologia Molecular da Universidade do Porto (IPATIMUP), Porto, Portugal
| | - Freddy Haesebrouck
- Department of Pathology, Bacteriology and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium
| | - Fátima Gärtner
- Instituto de Investigação e Inovação Em Saúde (i3S), Universidade do Porto, Porto, Portugal
- Instituto de Patologia e Imunologia Molecular da Universidade do Porto (IPATIMUP), Porto, Portugal
| | - Celso A. Reis
- Instituto de Investigação e Inovação Em Saúde (i3S), Universidade do Porto, Porto, Portugal
- Instituto de Patologia e Imunologia Molecular da Universidade do Porto (IPATIMUP), Porto, Portugal
- Instituto de Ciências Biomédicas Abel Salazar da Universidade do Porto (ICBAS), Porto, Portugal
- Faculdade de Medicina da Universidade do Porto (FMUP), Porto, Portugal
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Presence of Helicobacter pylori and H. suis DNA in Free-Range Wild Boars. Animals (Basel) 2021; 11:ani11051269. [PMID: 33925029 PMCID: PMC8146769 DOI: 10.3390/ani11051269] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 04/23/2021] [Accepted: 04/26/2021] [Indexed: 12/17/2022] Open
Abstract
Simple Summary Helicobacter pylori and H. suis are associated with gastric pathologies in humans. To obtain better insights into the potential role of wild boars as reservoirs of these pathogens, gastric samples of 14 animals were tested for the presence of H. pylori and H. suis DNA. Two wild boars were found PCR-positive for H. pylori and one for H. suis. This indicates that these microorganisms may colonize the stomach of wild boars. Abstract Helicobacter pylori (H. pylori) is a Gram-negative bacterium that infects half of the human population worldwide, causing gastric disorders, such as chronic gastritis, gastric or duodenal ulcers, and gastric malignancies. Helicobacter suis (H. suis) is mainly associated with pigs, but can also colonize the stomach of humans, resulting in gastric pathologies. In pigs, H. suis can induce gastritis and seems to play a role in gastric ulcer disease, seriously affecting animal production and welfare. Since close interactions between domestic animals, wildlife, and humans can increase bacterial transmission risk between species, samples of gastric tissue of 14 free range wild boars (Sus scrofa) were evaluated for the presence of H. pylori and H. suis using PCR. Samples from the antral gastric mucosa from two animals were PCR-positive for H. pylori and another one for H. suis. These findings indicate that these microorganisms were able to colonize the stomach of wild boars and raise awareness for their putative intervention in Helicobacter spp. transmission cycle.
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Sudden death associated with bleeding into digestive system of finishing pigs – a review. ACTA VET BRNO 2021. [DOI: 10.2754/avb202190010035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Sudden deaths of finishing pigs in modern pig herds cause economic losses and therefore draw constant attention worldwide. In the case of peracute mortality associated with gastrointestinal bleeding, pigs usually die during a short period without clinical manifestations. Necropsy can detect bleeding into various parts of the digestive system. Determining the exact aetiology of the sudden death can be difficult in many cases. Diseases and conditions such as gastric ulcers, abdominal torsion, haemorrhagic bowel syndrome and infectious diseases should be taken into account in the differential diagnosis. Because some of these diseases still have an unclear aetiology and pathogenesis, the aim of our work was to provide a summary of existing knowledge as well as to describe related pathognomonic pathological changes.
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Rimbara E, Suzuki M, Matsui H, Nakamura M, Morimoto M, Sasakawa C, Masuda H, Nomura S, Osaki T, Nagata N, Shibayama K, Tokunaga K. Isolation and characterization of Helicobacter suis from human stomach. Proc Natl Acad Sci U S A 2021; 118:e2026337118. [PMID: 33753513 PMCID: PMC8020762 DOI: 10.1073/pnas.2026337118] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Helicobacter suis, a bacterial species naturally hosted by pigs, can colonize the human stomach in the context of gastric diseases such as gastric mucosa-associated lymphoid tissue (MALT) lymphoma. Because H. suis has been successfully isolated from pigs, but not from humans, evidence linking human H. suis infection to gastric diseases has remained incomplete. In this study, we successfully in vitro cultured H. suis directly from human stomachs. Unlike Helicobacter pylori, the viability of H. suis decreases significantly on neutral pH; therefore, we achieved this using a low-pH medium for transport of gastric biopsies. Ultimately, we isolated H. suis from three patients with gastric diseases, including gastric MALT lymphoma. Successful eradication of H. suis yielded significant improvements in endoscopic and histopathological findings. Oral infection of mice with H. suis clinical isolates elicited gastric and systemic inflammatory responses; in addition, progression of gastric mucosal metaplasia was observed 4 mo postinfection. Because H. suis could be isolated from the stomachs of infected mice, our findings satisfied Koch's postulates. Although further prospective clinical studies are needed, H. suis, like H. pylori, is likely a gastric pathogen in humans. Furthermore, comparative genomic analysis of H. suis using complete genomes of clinical isolates revealed that the genome of each H. suis isolate contained highly plastic genomic regions encoding putative strain-specific virulence factors, including type IV secretion system-associated genes, and that H. suis isolates from humans and pigs were genetically very similar, suggesting possible pig-to-human transmission.
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Affiliation(s)
- Emiko Rimbara
- Department of Bacteriology II, National Institute of Infectious Diseases, 208-0011 Tokyo, Japan;
| | - Masato Suzuki
- Antimicrobial Research Center, National Institute of Infectious Diseases, 189-0002 Tokyo, Japan
| | - Hidenori Matsui
- Omura Satoshi Memorial Institute, Kitasato University, 108-8641 Tokyo, Japan;
| | | | - Misako Morimoto
- Department of Research Associate Product Development, Nippon Institute for Biological Science, 198-0024 Tokyo, Japan
| | - Chihiro Sasakawa
- Department of Research Associate Product Development, Nippon Institute for Biological Science, 198-0024 Tokyo, Japan
- Medical Mycology Research Center, Chiba University, 263-8522 Chiba, Japan
| | - Hiroki Masuda
- Department of Gastrointestinal Surgery, Graduate School of Medicine, The University of Tokyo, 113-8654 Tokyo, Japan
- Department of Gastrointestinal Surgery, Nippon Medical University, 113-8602 Tokyo, Japan
| | - Sachiyo Nomura
- Department of Gastrointestinal Surgery, Graduate School of Medicine, The University of Tokyo, 113-8654 Tokyo, Japan
| | - Takako Osaki
- Department of Infectious Diseases, Kyorin University School of Medicine, 181-8611 Tokyo, Japan
| | - Noriyo Nagata
- Department of Pathology, National Institute of Infectious Diseases, 208-0011 Tokyo, Japan
| | - Keigo Shibayama
- Department of Bacteriology II, National Institute of Infectious Diseases, 208-0011 Tokyo, Japan
| | - Kengo Tokunaga
- Department of General Medicine, Kyorin University School of Medicine, 181-8611 Tokyo, Japan
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Differentiation of Gastric Helicobacter Species Using MALDI-TOF Mass Spectrometry. Pathogens 2021; 10:pathogens10030366. [PMID: 33803832 PMCID: PMC8003121 DOI: 10.3390/pathogens10030366] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 03/15/2021] [Accepted: 03/16/2021] [Indexed: 02/07/2023] Open
Abstract
Gastric helicobacters (Helicobacter (H.) pylori and non-H. pylori Helicobacter species (NHPHs)) colonize the stomach of humans and/or animals. Helicobacter species identification is essential since many of them are recognized as human and/or animal pathogens. Currently, Helicobacter species can only be differentiated using molecular methods. Differentiation between NHPHs using MALDI-TOF MS has not been described before, probably because these species are poorly represented in current MALDI-TOF MS databases. Therefore, we identified 93 gastric Helicobacter isolates of 10 different Helicobacter species using MALDI-TOF MS in order to establish a more elaborate Helicobacter reference database. While the MALDI Biotyper database was not able to correctly identify any of the isolates, the in-house database correctly identified all individual mass spectra and resulted in 82% correct species identification based on the two highest log score matches (with log scores ≥2). In addition, a dendrogram was constructed using all newly created main spectrum profiles. Nine main clusters were formed, with some phylogenetically closely related Helicobacter species clustering closely together and well-defined subclusters being observed in specific species. Current results suggest that MALDI-TOF MS allows rapid differentiation between gastric Helicobacter species, provided that an extensive database is at hand and variation due to growth conditions and agar-medium-related peaks are taken into account.
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Evidence of Helicobacter spp. in Saliva and Gastric Mucosa of Domestic Dogs in the Central Region of Rio Grande do Sul, Brazil. Vet Med Int 2021; 2021:8857231. [PMID: 33575024 PMCID: PMC7864744 DOI: 10.1155/2021/8857231] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Revised: 11/22/2020] [Accepted: 01/06/2021] [Indexed: 01/03/2023] Open
Abstract
Helicobacter pylori is a spiral-shaped bacterium, which plays a role in the aetiology of gastric diseases in humans. Non-H. pylori Helicobacter (NHPH) species naturally colonise the stomach of animals and also induce gastric lesions in humans, highlighting their zoonotic importance. We evaluated the gastric bacterial colonisation density and gastric lesions and sought to identify the main phylogenetic groups of the Helicobacter spp. obtained from dogs in the central region of Rio Grande do Sul, Brazil, with this study aiming to investigate the occurrence of Helicobacter spp. in saliva and gastric samples from these dogs. This study included 35 dogs and used analysis such as cytology, histopathology, PCR, rapid urease testing, and phylogenetic analysis. Of the dogs, 94.3% were positive for Helicobacter spp., and these bacteria were present in the stomach of 32 dogs and saliva of eight. Respectively, eight, 15, and nine dogs had mild, moderate, and severe colonisation. Lymphocytic-plasmacytic infiltrate was the main gastric lesion. However, the presence of Helicobacter and the density appeared to be unrelated to the gastric lesions. The samples possessed a high nucleotide identity with remarkably similar sequences among some of the species of NHPH such as H. heilmannii s.s., H. salomonis, H. felis, and H. bizzozeronii. The saliva of domestic dogs, even of those who appear clinically healthy, can cause Helicobacter infection in humans and other animals, with, in these dogs, increased density, occurrence rate, and predominance of NHPH of zoonotic importance being found in the stomach with a lower occurrence of Helicobacter spp. in the saliva.
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Gorlé N, Bauwens E, Haesebrouck F, Smet A, Vandenbroucke RE. Helicobacter and the Potential Role in Neurological Disorders: There Is More Than Helicobacter pylori. Front Immunol 2021; 11:584165. [PMID: 33633723 PMCID: PMC7901999 DOI: 10.3389/fimmu.2020.584165] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Accepted: 12/04/2020] [Indexed: 12/17/2022] Open
Abstract
Trillions of symbiotic microbial cells colonize our body, of which the larger part is present in the human gut. These microbes play an essential role in our health and a shift in the microbiome is linked to several diseases. Recent studies also suggest a link between changes in gut microbiota and neurological disorders. Gut microbiota can communicate with the brain via several routes, together called the microbiome–gut–brain axis: the neuronal route, the endocrine route, the metabolic route and the immunological route. Helicobacter is a genus of Gram-negative bacteria colonizing the stomach, intestine and liver. Several papers show the role of H. pylori in the development and progression of neurological disorders, while hardly anything is known about other Helicobacter species and the brain. We recently reported a high prevalence of H. suis in patients with Parkinson’s disease and showed an effect of a gastric H. suis infection on the mouse brain homeostasis. Here, we discuss the potential role of H. suis in neurological disorders and how it may affect the brain via the microbiome–gut–brain axis.
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Affiliation(s)
- Nina Gorlé
- VIB Center for Inflammation Research, Ghent, Belgium.,Department of Biomedical Molecular Biology, Faculty of Sciences, Ghent University, Ghent, Belgium
| | - Eva Bauwens
- Department of Pathology, Bacteriology and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Freddy Haesebrouck
- Department of Pathology, Bacteriology and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Annemieke Smet
- Laboratory of Experimental Medicine and Pediatrics, Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
| | - Roosmarijn E Vandenbroucke
- VIB Center for Inflammation Research, Ghent, Belgium.,Department of Biomedical Molecular Biology, Faculty of Sciences, Ghent University, Ghent, Belgium
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Marini RP, Patterson MM, Muthupalani S, Feng Y, Holcombe H, Swennes AG, Ducore R, Whary MM, Shen Z, Fox JG. Helicobacter suis and Helicobacter pylori infection in a colony of research macaques: characterization and clinical correlates. J Med Microbiol 2021; 70. [PMID: 33475481 DOI: 10.1099/jmm.0.001315] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Introduction. Helicobacter suis (Helicobacter heilmannii type 1) commonly infects nonhuman primates but its clinical importance is in question.Aim. To characterize H. suis infection in a colony of rhesus macaques (Macaca mulatta) used in cognitive neuroscience research.Hypothesis/Gap Statement. Inquiries into the nature of Helicobacter suis in nonhuman primates are required to further define the organism's virulence and the experimental animal's gastric microbiome.Methodology. Animals with and without clinical signs of vomiting and abdominal pain (n=5 and n=16, respectively) were evaluated by histology, culture, PCR amplification and sequencing, fluorescent in situ hybridization (FISH) and serology. Three of the five animals with clinical signs, an index case and two others, were evaluated before and after antimicrobial therapy.Results. The index animal had endoscopically visible ulcers and multifocal, moderate, chronic lymphoplasmacytic gastritis with intraglandular and luminal spiral bacteria. Antimicrobial therapy in the index animal achieved histologic improvement, elimination of endoscopically visible ulcers, and evident eradication but clinical signs persisted. In the other treated animals, gastritis scores were not consistently altered, gastric bacteria persisted, but vomiting and abdominal discomfort abated.Nineteen of 21 animals were PCR positive for H. suis and five animals were also PCR positive for H. pylori. Organisms were detected by FISH in 17 of 21 animals: 16S rRNA sequences of two of these were shown to be H. suis. Mild to moderate lymphoplasmacytic gastritis was seen in antrum, body and cardia, with antral gastritis more likely to be moderate than that of the body.Conclusion. No clear association between the bacterial numbers of Helicobacter spp. and the degree of inflammation was observed. H. suis is prevalent in this colony of Macaca mulatta but its clinical importance remains unclear. This study corroborates many of the findings in earlier studies of H. suis infection in macaques but also identifies at least one animal in which gastritis and endoscopically visible gastric ulcers were strongly associated with H. suis infection. In this study, serology was an inadequate biomarker for endoscopic evaluation in diagnosis of H. suis infection.
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Affiliation(s)
- Robert P Marini
- The Division of Comparative Medicine, Massachusetts Institute of Technology, 77 Massachusetts Ave, Bldg 16-825, Cambridge, MA, USA
| | - Mary M Patterson
- The Division of Comparative Medicine, Massachusetts Institute of Technology, 77 Massachusetts Ave, Bldg 16-825, Cambridge, MA, USA
| | - Sureshkumar Muthupalani
- The Division of Comparative Medicine, Massachusetts Institute of Technology, 77 Massachusetts Ave, Bldg 16-825, Cambridge, MA, USA
| | - Yan Feng
- The Division of Comparative Medicine, Massachusetts Institute of Technology, 77 Massachusetts Ave, Bldg 16-825, Cambridge, MA, USA
| | - Hilda Holcombe
- The Division of Comparative Medicine, Massachusetts Institute of Technology, 77 Massachusetts Ave, Bldg 16-825, Cambridge, MA, USA
| | - Alton G Swennes
- The Division of Comparative Medicine, Massachusetts Institute of Technology, 77 Massachusetts Ave, Bldg 16-825, Cambridge, MA, USA
| | - Rebecca Ducore
- The Division of Comparative Medicine, Massachusetts Institute of Technology, 77 Massachusetts Ave, Bldg 16-825, Cambridge, MA, USA
| | - Mark M Whary
- The Division of Comparative Medicine, Massachusetts Institute of Technology, 77 Massachusetts Ave, Bldg 16-825, Cambridge, MA, USA
| | - Zeli Shen
- The Division of Comparative Medicine, Massachusetts Institute of Technology, 77 Massachusetts Ave, Bldg 16-825, Cambridge, MA, USA
| | - James G Fox
- The Division of Comparative Medicine, Massachusetts Institute of Technology, 77 Massachusetts Ave, Bldg 16-825, Cambridge, MA, USA
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De Luca S, Zanardi E, Alborali GL, Ianieri A, Ghidini S. Abattoir-Based Measures to Assess Swine Welfare: Analysis of the Methods Adopted in European Slaughterhouses. Animals (Basel) 2021; 11:ani11010226. [PMID: 33477630 PMCID: PMC7831492 DOI: 10.3390/ani11010226] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 01/03/2021] [Accepted: 01/15/2021] [Indexed: 12/12/2022] Open
Abstract
Simple Summary The welfare of pigs is a major concern among some consumers and pig producers. This concern has driven welfare specialists into the validation of methods and protocols that can be used to evaluate the welfare status of pigs on farms. These protocols require the use of animal-, management and resource-based measures, although data collected from the animals are generally considered more useful. However, due to some limitations, these schemes are not always applicable; therefore, the use of simplified schemes involving the collection of data from pigs at the slaughterhouse has been advocated. Methods and scoring schemes recently described and used in studies performed in European slaughterhouses to determine pig welfare and health are reviewed in the present manuscript. A focus on the scoring schemes for lesions of the body and viscera during post-mortem activities at the abattoir is provided. These methods can be used to benchmark a welfare scheme suitable for all European competent authorities and professionals working in the context of pig welfare. Abstract The assessment of swine welfare requires feasible, reliable, and reasonable indicators. On-farm evaluation of pig welfare can provide valuable information to veterinarians and farmers. However, such protocols can result expensive and time-consuming. With this regard, an interest in the appraisal of swine welfare at abattoir has grown over the recent years. In particular, the use of certain lesions collected directly from slaughtered animals to determine the welfare status of pigs has been evaluated by several authors. In the present review, the different methods developed to score lesions collected directly from the body and the viscera of animals slaughtered in European abattoirs (“abattoir-based measures”) are presented. The text specifically focuses on the methods currently available in the literature for the scoring of body, pluck and gastric lesions during post-mortem activities. Moreover, the strengths and weaknesses of abattoir-based measures schemes are discussed. To conclude, the future perspectives of the assessment of pig welfare at the slaughterhouse are described, appealing for a benchmarking system that can be systematically used by veterinarians and other professional figures involved in the process.
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Affiliation(s)
- Silvio De Luca
- Department of Food and Drug, University of Parma, Via del Taglio 10, 43126 Parma, Italy; (E.Z.); (A.I.); (S.G.)
- Correspondence: ; Tel.: +39-0521902753
| | - Emanuela Zanardi
- Department of Food and Drug, University of Parma, Via del Taglio 10, 43126 Parma, Italy; (E.Z.); (A.I.); (S.G.)
| | - Giovanni Loris Alborali
- Istituto Zooprofilattico Sperimentale della Lombardia e dell’Emilia Romagna-Headquarters, Via A. Bianchi, 9, 25124 Brescia, Italy;
| | - Adriana Ianieri
- Department of Food and Drug, University of Parma, Via del Taglio 10, 43126 Parma, Italy; (E.Z.); (A.I.); (S.G.)
| | - Sergio Ghidini
- Department of Food and Drug, University of Parma, Via del Taglio 10, 43126 Parma, Italy; (E.Z.); (A.I.); (S.G.)
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Peng W, Li H, Xu Y, Yan L, Tang Z, Hossein Mohseni A, Taghinezhad-S S, Tang X, Fu X. Association of Helicobacter bilis Infection with the Development of Colorectal Cancer. Nutr Cancer 2020; 73:2785-2795. [PMID: 33325271 DOI: 10.1080/01635581.2020.1862253] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The role of Helicobacter_bilis (H.bilis) in the development of inflammatory bowel disease (IBD) and colitis-associated carcinogenesis (CAC) has seldom been investigated. We examined the abundance of H.bilis in 58 colorectal cancers (CRCs), 20 IBDs, 40 cases of normal colorectal mucosa (NCs), and 20 adenomas (ADs) by 16S rRNA fluorescence in situ hybridization (FISH). Number of CD4+CD45RB+T cell and expression of IFN-γ and TNF-α in these tissues was determined by immunofluorescence. The abundance of H.bilis was significantly higher in CRCs than that in IBDs (P = 0.006), ADs (P < 0.001) and NCs (P < 0.0001). The abundance of H.bilis in IBDs was significantly higher than that in ADs (P = 0.013). Moreover, the average number of CD4+CD45RB+T cell was significantly higher in CRCs than that in IBDs (P = 0.017) and NCs (P = 0.009). In addition, there was a positive correlation between the H.bilis abundance and density of CD4+CD45RB+T cells in 30 colorectal tissues (P < 0.0001). The frequency of co-staining for CD4+CD45RB+T cells and IFN-γ was significantly higher in H.bilis positive group than that in H.bilis negative group (P = 0.002). H.bilis may play a role in the initiation of IBD and CAC, possibly through promoting the transformation of T cells into CD4+CD45RB+T cells and increasing the expression of proinflammatory cytokines IFN-γ.
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Affiliation(s)
- Wei Peng
- Department of Gastroenterology, the Affiliated Hospital of Southwest Medical University, Sichuan, China
| | - Huan Li
- Department of Gastroenterology, the Affiliated Hospital of Southwest Medical University, Sichuan, China
| | - Yun Xu
- Department of Gastroenterology, the People's Hospital of Guangan City, Sichuan, China
| | - Li Yan
- Digestive Endoscopy Center, the Affiliated Hospital of North Sichuan Medical College, Sichuan, China
| | - Zhenzhen Tang
- Digestive Endoscopy Center, the Affiliated Hospital of North Sichuan Medical College, Sichuan, China
| | - Amir Hossein Mohseni
- Digestive Endoscopy Center, the Affiliated Hospital of North Sichuan Medical College, Sichuan, China
| | - Sedigheh Taghinezhad-S
- Digestive Endoscopy Center, the Affiliated Hospital of North Sichuan Medical College, Sichuan, China
| | - Xiaowei Tang
- Department of Gastroenterology, the Affiliated Hospital of Southwest Medical University, Sichuan, China
| | - Xiangsheng Fu
- Department of Gastroenterology, the Affiliated Hospital of Southwest Medical University, Sichuan, China.,Digestive Endoscopy Center, the Affiliated Hospital of North Sichuan Medical College, Sichuan, China
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Park HS, Jeong HY, Kim YS, Seo CS, Ha H, Kwon HJ. Anti-microbial and anti-inflammatory effects of Cheonwangbosim-dan against Helicobacter pylori-induced gastritis. J Vet Sci 2020; 21:e39. [PMID: 32476313 PMCID: PMC7263912 DOI: 10.4142/jvs.2020.21.e39] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 01/26/2020] [Accepted: 01/26/2020] [Indexed: 12/11/2022] Open
Abstract
Background There are various Helicobacter species colonizing the stomachs of animals. Although Helicobacter species usually cause asymptomatic infection in the hosts, clinical signs can occur due to gastritis associated with Helicobacter in animals. Among them, Helicobacter pylori is strongly associated with chronic gastritis, gastric ulcers, and gastric cancers. As the standard therapies used to treat H. pylori have proven insufficient, alternative options are needed to prevent and eradicate the diseases associated with this bacterium. Cheonwangbosim-dan (CBD), a traditional herbal formula that is popular in East Asia, has been commonly used for arterial or auricular flutter, neurosis, insomnia, and cardiac malfunction-induced disease. Objectives The present study investigated the antimicrobial effect of CBD on H. pylori-infected human gastric carcinoma AGS cells and model mice. Methods AGS cells were infected with H. pylori and treated with a variety of concentrations of CBD or antibiotics. Mice were given 3 oral inoculations with H. pylori and then dosed with CBD (100 or 500 mg/kg) for 4 weeks or with standard antibiotics for 1 week. One week after the last treatment, gastric samples were collected and examined by histopathological analysis, real-time quantitative polymerase chain reaction, and immunoblotting. Results Our results showed that CBD treatment of AGS cells significantly reduced the H. pylori-induced elevations of interleukin-8, inducible nitric oxide synthase (iNOS), and cyclooxygenase-2 (COX-2). In the animal model, CBD treatment inhibited the colonization of H. pylori and the levels of malondialdehyde, inflammation, proinflammatory cytokines, iNOS, and COX-2 in gastric tissues. CBD also decreased the phosphorylation levels of p38 mitogen-activated protein kinase family. Conclusions This study suggests that CBD might be a prospective candidate for treating H. pylori-induced gastric injury.
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Affiliation(s)
- Hee Seon Park
- Department of Veterinary Pathology, College of Veterinary Medicine, Chungnam National University, Daejeon 34134, Korea
| | - Hye Yun Jeong
- Department of Veterinary Pathology, College of Veterinary Medicine, Chungnam National University, Daejeon 34134, Korea
| | - Young Suk Kim
- Department of Veterinary Pathology, College of Veterinary Medicine, Chungnam National University, Daejeon 34134, Korea
| | - Chang Seob Seo
- Herbal Medicine Research Division, Korea Institute of Oriental Medicine, Daejeon 34054, Korea
| | - Hyekyung Ha
- Herbal Medicine Research Division, Korea Institute of Oriental Medicine, Daejeon 34054, Korea
| | - Hyo Jung Kwon
- Department of Veterinary Pathology, College of Veterinary Medicine, Chungnam National University, Daejeon 34134, Korea.
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Segawa T, Ohno Y, Tsuchida S, Ushida K, Yoshioka M. Helicobacter delphinicola sp. nov., isolated from common bottlenose dolphins Tursiops truncatus with gastric diseases. DISEASES OF AQUATIC ORGANISMS 2020; 141:157-169. [PMID: 33030444 DOI: 10.3354/dao03511] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Gastritis and gastric ulcers are well-recognized symptoms in cetaceans, and the genus Helicobacter is considered as the main cause. In this study, we examined the gastric fluid of captive common bottlenose dolphins Tursiops truncatus with gastric diseases in order to isolate the organisms responsible for diagnosis and treatment. Four Gram-negative, rod-shaped isolates (TSBT, TSH1, TSZ, and TSH3) with tightly coiled spirals with 2-4 turns and 2-6 bipolar, sheathed flagella, were obtained from gastric fluids of common bottlenose dolphins with gastric diseases. Phylogenetic analysis, based on 16S rRNA, atpA, and 60 kDa heat-shock protein (hsp60) genes, demonstrated that these isolates form a novel lineage within the genus Helicobacter. Analyses of 16S rRNA, atpA, and hsp60 gene sequences showed that isolate TSBT was most closely related to H. cetorum MIT99-5656T (98.5% similarity), H. pylori ATCC 43504T (76.7% similarity), and H. pylori ATCC 43504T (78.0% similarity), respectively. Type strains of Helicobacter showing resistance to 2% NaCl have not been reported previously; however, these novel isolates were resistant to 2% NaCl. Culture supernatant of some isolates induced intracellular vacuolization in mammalian cultured cells. These data, together with the different morphological and biochemical characteristics of the isolates, reveal that these isolates represent a novel species for which we propose the name Helicobacter delphinicola sp. nov. with type strain TSBT (= JCM 32789T = TSD-183T). Future studies will confirm whether H. delphinicola plays a role in lesion etiopathogenesis in cetaceans.
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Affiliation(s)
- Takao Segawa
- Cetacean Research Center, Graduate School of Bioresources, Mie University, 1577 Kurimamachiya, Tsu, Mie 514-8507, Japan
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Hortelano I, Moreno Y, Moreno-Mesonero L, Ferrús MA. Deep-amplicon sequencing (DAS) analysis to determine the presence of pathogenic Helicobacter species in wastewater reused for irrigation. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 264:114768. [PMID: 32434114 DOI: 10.1016/j.envpol.2020.114768] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 04/06/2020] [Accepted: 05/06/2020] [Indexed: 06/11/2023]
Abstract
Wastewater has become one of the most important and least expensive water for the agriculture sector, as well as an alternative to the overexploitation of water resources. However, inappropriate treatment before its reuse can result in a negative impact on the environment, such as the presence of pathogens. This poses an increased risk for environmental safety, which can subsequently lead to an increased risk for human health. Among all the emerging wastewater pathogens, bacteria of the genus Helicobacter are some of the most disturbing ones, since they are directly related to gastric illness and hepatobiliary and gastric cancer. Therefore, the aim of this study was to determine the presence of potentially pathogenic Helicobacter spp. in treated wastewater intended for irrigation. We used a next generation sequencing approach, based on Illumina sequencing in combination with culture and other molecular techniques (qPCR, FISH and DVC-FISH), to analyze 16 wastewater samples, with and without an enrichment step. By culture, one of the direct samples was positive for H. pylori. FISH and DVC-FISH techniques allowed for detecting viable Helicobacter spp., including H. pylori, in seven out of eight samples of wastewater from the tertiary effluents, while qPCR analysis yielded only three positive results. When wastewater microbiome was analyzed, Helicobacter genus was detected in 7 samples. The different molecular techniques used in the present study provided evidence, for the first time, of the presence of species belonging to the genus Helicobacter such as H. pylori, H. hepaticus, H. pullorum and H. suis in wastewater samples, even after disinfection treatment.
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Affiliation(s)
- Irene Hortelano
- Research Institute of Water and Environmental Engineering (IIAMA), Universitat Politècnica de València, 46022, Valencia, Spain
| | - Yolanda Moreno
- Research Institute of Water and Environmental Engineering (IIAMA), Universitat Politècnica de València, 46022, Valencia, Spain.
| | - Laura Moreno-Mesonero
- Research Institute of Water and Environmental Engineering (IIAMA), Universitat Politècnica de València, 46022, Valencia, Spain
| | - María Antonia Ferrús
- Biotechnology Department, Universitat Politècnica de València, 46022, Valencia, Spain
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Guo Z, Hu B, Han H, Lei Z, Shimizu K, Zhang L, Zhang Z. Metagenomic insights into the effects of nanobubble water on the composition of gut microbiota in mice. Food Funct 2020; 11:7175-7182. [PMID: 32756645 DOI: 10.1039/d0fo01592j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The particular physicochemical and biological properties of nanobubbles (NBs) have prompted many researchers to conduct an in-depth study on their potential application in various fields. This study aims to investigate the effects of nanobubble water (NBW) on the community structure of the gut microbiota in mice. In this study, supplementation with nitrogen NBW (SD-N2 group), hydrogen NBW (SD-H2 group) and deionized water (SD-C group) to a standard diet of mice was performed for five weeks. The composition of fecal microbiota was analyzed by using 16S rRNA gene sequencing. Compared with the SD-C group, the species diversity of the fecal microbiota in mice in NBW groups was significantly increased. At the genus level, supplementation with nitrogen NBW to mice significantly increased the relative abundance of two beneficial genera Clostridium and Coprococcus (mean growth 6.3 times and 9.7 times, respectively), while supplementation with hydrogen NBW significantly decreased the relative abundance of two pathogenic genera Mucispirillum and Helicobacter (mean reduction rate 86% and 60%, respectively). These results demonstrate that supplementation with NBW might optimize the composition of gut microbiota in mice.
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Affiliation(s)
- Zitao Guo
- National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi 214122, China.
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Antimicrobial Susceptibility Pattern of Helicobacter heilmannii and Helicobacter ailurogastricus Isolates. Microorganisms 2020; 8:microorganisms8060957. [PMID: 32630563 PMCID: PMC7355750 DOI: 10.3390/microorganisms8060957] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 06/04/2020] [Accepted: 06/23/2020] [Indexed: 12/13/2022] Open
Abstract
A combined agar and broth dilution method followed by qPCR was used to determine the antimicrobial susceptibility of feline H. heilmannii and H. ailurogastricus isolates. All H. ailurogastricus isolates showed a monomodal distribution of MICs for all the antimicrobial agents tested. For H. heilmannii, a bimodal distribution was observed for azithromycin, enrofloxacin, spectinomycin, and lincomycin. Single nucleotide polymorphisms (SNPs) were found in 50S ribosomal proteins L2 and L3 of the H. heilmannii isolate not belonging to the WT population for azithromycin, and in 30S ribosomal proteins S1, S7, and S12 of the isolate not belonging to the WT population for spectinomycin. The antimicrobial resistance mechanism to enrofloxacin and lincomycin remains unknown (2 and 1 H. heilmannii isolate(s), resp.). Furthermore, H. heilmannii isolates showed higher MICs for neomycin compared to H. ailurogastricus isolates which may be related to the presence of SNPs in several 30S and 50S ribosomal protein encoding genes and ribosomal RNA methyltransferase genes. This study shows that acquired resistance to azithromycin, spectinomycin, enrofloxacin, and lincomycin occasionally occurs in feline H. heilmannii isolates. As pets may constitute a source of infection for humans, this should be kept in mind when dealing with a human patient infected with H. heilmannii.
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