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Lee SJ, Ahn SY, Oh HB, Kim SY, Song WS, Yoon SI. Structural and Biochemical Analysis of the Recombination Mediator Protein RecR from Campylobacter jejuni. Int J Mol Sci 2023; 24:12947. [PMID: 37629127 PMCID: PMC10454854 DOI: 10.3390/ijms241612947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 08/15/2023] [Accepted: 08/17/2023] [Indexed: 08/27/2023] Open
Abstract
The recombination mediator complex RecFOR, consisting of the RecF, RecO, and RecR proteins, is needed to initiate homologous recombination in bacteria by positioning the recombinase protein RecA on damaged DNA. Bacteria from the phylum Campylobacterota, such as the pathogen Campylobacter jejuni, lack the recF gene and trigger homologous recombination using only RecR and RecO. To elucidate the functional properties of C. jejuni RecR (cjRecR) in recombination initiation that differ from or are similar to those in RecF-expressing bacteria, we determined the crystal structure of cjRecR and performed structure-based binding analyses. cjRecR forms a rectangular ring-like tetrameric structure and coordinates a zinc ion using four cysteine residues, as observed for RecR proteins from RecF-expressing bacteria. However, the loop of RecR that has been shown to recognize RecO and RecF in RecF-expressing bacteria is substantially shorter in cjRecR as a canonical feature of Campylobacterota RecR proteins, indicating that cjRecR lost a part of the loop in evolution due to the lack of RecF and has a low RecO-binding affinity. Furthermore, cjRecR features a larger positive patch and exhibits substantially higher ssDNA-binding affinity than RecR from RecF-expressing bacteria. Our study provides a framework for a deeper understanding of the RecOR-mediated recombination pathway.
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Affiliation(s)
- Su-jin Lee
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Si Yeon Ahn
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Han Byeol Oh
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Seung Yeon Kim
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Wan Seok Song
- Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Sung-il Yoon
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, Chuncheon 24341, Republic of Korea
- Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon 24341, Republic of Korea
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Kreuzer M, Hardt WD. How Food Affects Colonization Resistance Against Enteropathogenic Bacteria. Annu Rev Microbiol 2020; 74:787-813. [DOI: 10.1146/annurev-micro-020420-013457] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Food has a major impact on all aspects of health. Recent data suggest that food composition can also affect susceptibility to infections by enteropathogenic bacteria. Here, we discuss how food may alter the microbiota as well as mucosal defenses and how this can affect infection. Salmonella Typhimurium diarrhea serves as a paradigm, and complementary evidence comes from other pathogens. We discuss the effects of food composition on colonization resistance, host defenses, and the infection process as well as the merits and limitations of mouse models and experimental foods, which are available to decipher the underlying mechanisms.
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Affiliation(s)
- Markus Kreuzer
- Institute of Microbiology, Department of Biology, ETH Zurich, CH-8093 Zurich, Switzerland
| | - Wolf-Dietrich Hardt
- Institute of Microbiology, Department of Biology, ETH Zurich, CH-8093 Zurich, Switzerland
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A loop-mediated isothermal amplification (LAMP) assay for the consensus detection of human pathogenic Campylobacter species. J Microbiol Methods 2020; 176:106009. [PMID: 32707152 DOI: 10.1016/j.mimet.2020.106009] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 07/07/2020] [Accepted: 07/17/2020] [Indexed: 02/02/2023]
Abstract
Most rapid identification methods for Campylobacter are designed to detect thermotolerant Campylobacter jejuni (C. jejuni) and Campylobacter coli (C. coli). A growing number of thermosensitive Campylobacter species are now gaining recognition as emerging human pathogens. Methods are lacking for the rapid screening of these emerging species. Loop-mediated Isothermal Amplification (LAMP) is a nucleic acid amplification method that allows for the rapid and cost-effective detection of bacteria. Degenerate primers against the 16S rRNA sequences for C. jejuni, C. coli, C. lari, C. upsaliensis, C. ureolyticus, C. fetus, C. gracilis, C. rectus, and C. concisus were designed. Isothermal amplification was conducted using ATCC reference strains at 68 °C for 30 min using WarmStart® Colorimetric LAMP reagents. Positive reactions were indicated by a color change from pink to yellow; specificity to Campylobacter was confirmed using a restriction enzyme digest (RsaI). The developed LAMP reaction was specific for the reference strains, which was confirmed against an exclusivity panel that consisted of other enteric pathogens, including E. coli, Salmonella, Shigella, Helicobacter, and Arcobacter. This method was also evaluated for the detection of C. jejuni, C. coli, and C. lari in primary enrichment media from artificially contaminated fresh spinach samples. The LAMP method provides an option to rapidly screen for the presence of pathogenic Campylobacter spp. in field surveillance and trace-back analysis.
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Meyer CT, Bauer IK, Antonio M, Adeyemi M, Saha D, Oundo JO, Ochieng JB, Omore R, Stine OC, Wang D, Holtz LR. Prevalence of classic, MLB-clade and VA-clade Astroviruses in Kenya and The Gambia. Virol J 2015; 12:78. [PMID: 25975198 PMCID: PMC4465002 DOI: 10.1186/s12985-015-0299-z] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Accepted: 04/15/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Infectious diarrhea leads to significant mortality in children, with 40 % of these deaths occurring in Africa. Classic human astroviruses are a well-established etiology of diarrhea. In recent years, seven novel astroviruses have been discovered (MLB1, MLB2, MLB3, VA1/HMO-C, VA2/HMO-B, VA3/HMO-A, VA4); however, there have been few studies on their prevalence or potential association with diarrhea. METHODS To investigate the prevalence and diversity of these classic and recently described astroviruses in a pediatric population, a case-control study was performed. Nine hundred and forty nine stools were previously collected from cases of moderate-to-severe diarrhea and matched controls of patients less than 5 years of age in Kenya and The Gambia. RT-PCR screening was performed using pan-astrovirus primers. RESULTS Astroviruses were present in 9.9 % of all stool samples. MLB3 was the most common astrovirus with a prevalence of 2.6 %. Two subtypes of MLB3 were detected that varied based on location in Africa. In this case-control study, Astrovirus MLB1 was associated with diarrhea in Kenya, whereas Astrovirus MLB3 was associated with the control state in The Gambia. Classic human astrovirus was not associated with diarrhea in this study. Unexpectedly, astroviruses with high similarity to Canine Astrovirus and Avian Nephritis Virus 1 and 2 were also found in one case of diarrhea and two control stools respectively. CONCLUSIONS Astroviruses including novel MLB- and VA-clade members are commonly found in pediatric stools in Kenya and The Gambia. The most recently discovered astrovirus, MLB3, was the most prevalent and was found more commonly in control stools in The Gambia, while astrovirus MLB1 was associated with diarrhea in Kenya. Furthermore, a distinct subtype of MLB3 was noted, as well as 3 unanticipated avian or canine astroviruses in the human stool samples. As a result of a broadly reactive PCR screen for astroviruses, new insight was gained regarding the epidemiology of astroviruses in Africa, where a large proportion of diarrheal morbidity and mortality occur.
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Affiliation(s)
| | - Irma K Bauer
- Washington University School of Medicine, Saint Louis, MO, USA.
| | | | | | - Debasish Saha
- Medical Research Council Unit, Banjul, The Gambia. .,Center for International Health, Department of Preventive and Social Medicine, Dunedin School of Medicine, University of Otago, Dunedin, New Zealand.
| | - Joseph O Oundo
- Kenya Medical Research Institute/Centers for Disease Control and Prevention, Kisumu, Kenya.
| | - John B Ochieng
- Kenya Medical Research Institute/Centers for Disease Control and Prevention, Kisumu, Kenya.
| | - Richard Omore
- Kenya Medical Research Institute/Centers for Disease Control and Prevention, Kisumu, Kenya.
| | - O Colin Stine
- University of Maryland School of Medicine, Baltimore, MD, USA.
| | - David Wang
- Washington University School of Medicine, Saint Louis, MO, USA.
| | - Lori R Holtz
- Washington University School of Medicine, Saint Louis, MO, USA.
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Bae JS, Yuki N, Kuwabara S, Kim JK, Vucic S, Lin CS, Kiernan MC. Guillain-Barré syndrome in Asia. J Neurol Neurosurg Psychiatry 2014; 85:907-13. [PMID: 24357682 DOI: 10.1136/jnnp-2013-306212] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Over the past 20 years, the most notable advance in understanding Guillain-Barré syndrome (GBS) has been the identification of an axonal variant. This advance arose chiefly through studies undertaken in East Asian countries and comprised two major aspects: first, the immunopathogenesis of axonal GBS related to anti-ganglioside antibodies and molecular mimicry of Campylobacter jejuni; and second, the observation that distinct electrophysiological patterns of axonal GBS existed, reflecting reversible conduction failure (RCF). As a consequence, the pathophysiology of acute motor axonal neuropathy (AMAN) has perhaps become better understood than acute inflammatory demyelinating polyneuropathy. Despite these more recent advances, a critical issue remains largely unresolved: whether axonal GBS is more common in Asia than in Europe or North America. If it is more common in Asia, then causative factors must be more critically considered, including geographical differences, issues of genetic susceptibility, the role of antecedent infections and other potential triggering factors. It has become apparent that the optimal diagnosis of AMAN requires serial electrophysiological testing, to better delineate RCF, combined with assessment for the presence of anti-ganglioside antibodies. Recent collaborative approaches between Europe and Asia have suggested that both the electrophysiological pattern of AMAN and the seropositivity for anti-ganglioside antibodies develop similarly. Separately, however, current electrodiagnostic criteria for AMAN limited to a single assessment appear inadequate to identify the majority of cases. As such, diagnostic criteria will need to be revised to improve the diagnostic sensitivity for AMAN.
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Affiliation(s)
- Jong Seok Bae
- Department of Neurology, College of Medicine, Hallym University, Seoul, Korea Neuroscience Research Australia, Sydney, Australia
| | - Nobuhiro Yuki
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Satoshi Kuwabara
- Department of Neurology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Jong Kuk Kim
- Department of Neurology, College of Medicine, Dong-A University, Busan, Korea
| | - Steve Vucic
- Neuroscience Research Australia, Sydney, Australia Department of Neurology, Westmead Clinical School, University of Sydney, Sydney, New South Wales, Australia
| | - Cindy S Lin
- Neuroscience Research Australia, Sydney, Australia
| | - Matthew C Kiernan
- Bushell Chair of Neurology, Brain & Mind Research Institute, University of Sydney, Sydney, New South Wales, Australia
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Burbacher TM, Grant KS, Worlein J, Ha J, Curnow E, Juul S, Sackett GP. Four decades of leading-edge research in the reproductive and developmental sciences: the Infant Primate Research Laboratory at the University of Washington National Primate Research Center. Am J Primatol 2013; 75:1063-83. [PMID: 23873400 PMCID: PMC5452618 DOI: 10.1002/ajp.22175] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Revised: 05/31/2013] [Accepted: 05/31/2013] [Indexed: 12/20/2022]
Abstract
The Infant Primate Research Laboratory (IPRL) was established in 1970 at the University of Washington as a visionary project of Dr. Gene (Jim) P. Sackett. Supported by a collaboration between the Washington National Primate Research Center and the Center on Human Development and Disability, the IPRL operates under the principle that learning more about the causes of abnormal development in macaque monkeys will provide important insights into the origins and treatment of childhood neurodevelopmental disabilities. Over the past 40 years, a broad range of research projects have been conducted at the IPRL. Some have described the expression of normative behaviors in nursery-reared macaques while others have focused on important biomedical themes in child health and development. This article details the unique scientific history of the IPRL and the contributions produced by research conducted in the laboratory. Past and present investigations have explored the topics of early rearing effects, low-birth-weight, prematurity, birth injury, epilepsy, prenatal neurotoxicant exposure, viral infection (pediatric HIV), diarrheal disease, vaccine safety, and assisted reproductive technologies. Data from these studies have helped advance our understanding of both risk and resiliency in primate development. New directions of research at the IPRL include the production of transgenic primate models using our embryonic stem cell-based technology to better understand and treat heritable forms of human intellectual disabilities such as fragile X.
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Affiliation(s)
- Thomas M. Burbacher
- Department of Environmental and Occupational Health Sciences, School of Public Health, University of Washington, Seattle, WA, 98195 USA
- Center on Human Development and Disability, University of Washington, Seattle, WA, 98195 USA
- Washington National Primate Research Center, University of Washington, Seattle, WA 98195 USA
| | - Kimberly S. Grant
- Department of Environmental and Occupational Health Sciences, School of Public Health, University of Washington, Seattle, WA, 98195 USA
- Center on Human Development and Disability, University of Washington, Seattle, WA, 98195 USA
- Washington National Primate Research Center, University of Washington, Seattle, WA 98195 USA
| | - Julie Worlein
- Washington National Primate Research Center, University of Washington, Seattle, WA 98195 USA
| | - James Ha
- Washington National Primate Research Center, University of Washington, Seattle, WA 98195 USA
- Department of Psychology, School of Arts and Sciences, University of Washington, Seattle, WA, 98195 USA
| | - Eliza Curnow
- Washington National Primate Research Center, University of Washington, Seattle, WA 98195 USA
| | - Sandra Juul
- Center on Human Development and Disability, University of Washington, Seattle, WA, 98195 USA
- Department of Pediatrics, School of Medicine, University of Washington, Seattle, WA, 98195 USA
| | - Gene P. Sackett
- Center on Human Development and Disability, University of Washington, Seattle, WA, 98195 USA
- Washington National Primate Research Center, University of Washington, Seattle, WA 98195 USA
- Department of Psychology, School of Arts and Sciences, University of Washington, Seattle, WA, 98195 USA
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Kirkpatrick BD, Lyon CE, Porter CK, Maue AC, Guerry P, Pierce KK, Carmolli MP, Riddle MS, Larsson CJ, Hawk D, Dill EA, Fingar A, Poly F, Fimlaid KA, Hoq F, Tribble DR. Lack of homologous protection against Campylobacter jejuni CG8421 in a human challenge model. Clin Infect Dis 2013; 57:1106-13. [PMID: 23840001 DOI: 10.1093/cid/cit454] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Campylobacter jejuni is a common cause of diarrhea and is associated with serious postinfectious sequelae. Although symptomatic and asymptomatic infections are recognized, protective immunity is not well understood. Previous data suggests that interferon γ (IFN-γ) may be associated with protection. To better define the clinical and immunologic development of protective immunity to C. jejuni, we assessed the ability of an initial infection to prevent clinical illness after a second experimental infection. METHODS Subjects with no clinical or immunologic evidence of prior infection with C. jejuni received an initial challenge with C. jejuni CG8421 with rechallenge 3 months later. The primary endpoint was campylobacteriosis, as defined by diarrhea and/or systemic signs. Close inpatient monitoring was performed. Serum immunoglobulin A (IgA) and immunoglobulin G (IgG), fecal IgA, IgA antibody-secreting cells (ASCs), and IFN-γ production were evaluated. All subjects were treated with antibiotics and were clinically well at discharge. RESULTS Fifteen subjects underwent a primary infection with C. jejuni CG8421; 14 (93.3%) experienced campylobacteriosis. Eight subjects received the second challenge, and all experienced campylobacteriosis with similar severity. Immune responses after primary infection included serum IgA, IgG, ASC, and IFN-γ production. Responses were less robust after secondary infection. CONCLUSIONS In naive healthy adults, a single infection with CG8421 did not protect against campylobacteriosis. Although protection has been demonstrated with other strains and after continuous environmental exposure, our work highlights the importance of prior immunity, repeated exposures, and strain differences in protective immunity to C. jejuni. CLINICAL TRIALS REGISTRATION NCT01048112.
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Affiliation(s)
- Beth D Kirkpatrick
- University of Vermont College of Medicine, Unit of Infectious Diseases and Vaccine Testing Center, Burlington, Vermont
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Mason J, Iturriza-Gomara M, O’Brien SJ, Ngwira BM, Dove W, Maiden MCJ, Cunliffe NA. Campylobacter infection in children in Malawi is common and is frequently associated with enteric virus co-infections. PLoS One 2013; 8:e59663. [PMID: 23555739 PMCID: PMC3608717 DOI: 10.1371/journal.pone.0059663] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2012] [Accepted: 02/17/2013] [Indexed: 11/18/2022] Open
Abstract
Background Campylobacter species are the most common cause of bacterial gastroenteritis in the developed world. However, comparatively few studies have determined the epidemiological features of campylobacteriosis in resource-poor settings. Methods A total of 1,941 faecal specimens collected from symptomatic (diarrhoeic) children and 507 specimens from asymptomatic (non-diarrhoeic) children hospitalised in Blantyre, Malawi, between 1997 and 2007, and previously tested for the presence of rotavirus and norovirus, was analysed for C. jejuni and C. coli using a real time PCR assay. Results Campylobacter species were detected in 415/1,941 (21%) of diarrhoeic children, with C. jejuni accounting for 85% of all cases. The median age of children with Campylobacter infection was 11 months (range 0.1–55 months), and was significantly higher than that for children with rotavirus and norovirus (6 months and 7 months respectively; P<0.001). Co-infection with either rotavirus or norovirus was noted in 41% of all cases in the diarrhoeic group. In contrast, the detection rate of Campylobacter in the non-diarrhoeic group was 14%, with viral co-infection identified in 16% of children with Campylobacter. There was no association between Campylobacter detection rate and season over the 10 year period. Discussion Using molecular detection methodology in hospitalised Malawian children, we have demonstrated a high prevalence of Campylobacter infection, with frequent viral co-infection. The burden of Campylobacter infection in young African children may be greater than previously recognised.
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Affiliation(s)
- Jenifer Mason
- Institute of Infection and Global Health, University of Liverpool, Liverpool, United Kingdom
| | - Miren Iturriza-Gomara
- Institute of Infection and Global Health, University of Liverpool, Liverpool, United Kingdom
| | - Sarah J. O’Brien
- Institute of Infection and Global Health, University of Liverpool, Liverpool, United Kingdom
| | - Bagrey M. Ngwira
- Department of Community Health, College of Medicine, University of Malawi, Blantyre, Malawi
| | - Winifred Dove
- Institute of Infection and Global Health, University of Liverpool, Liverpool, United Kingdom
| | | | - Nigel A. Cunliffe
- Institute of Infection and Global Health, University of Liverpool, Liverpool, United Kingdom
- * E-mail:
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Rajendran P, Babji S, George AT, Rajan DP, Kang G, Ajjampur SS. Detection and species identification of Campylobacter in stool samples of children and animals from Vellore, south India. Indian J Med Microbiol 2012; 30:85-8. [PMID: 22361767 DOI: 10.4103/0255-0857.93049] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Campylobacter spp. are an important cause of bacterial gastroenteritis frequently isolated from animal, poultry and environmental samples. In this study, we investigated the zoonotic potential of Campylobacter spp. by comparing prevalence rates and species in 394 children with diarrhoea and 652 animals in Vellore using PCR-based tools. Eighteen children (4.5%) had campylobacteriosis, a majority of whom had co-pathogens (15/18) and most were infected with Campylobacter jejuni (16/18). A few C. coli and mixed infections with both species were also seen. Among the animal samples, 16/25 chicken samples (64%) were positive and all were found to be C. jejuni.
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Affiliation(s)
- P Rajendran
- Department of Gastrointestinal Sciences, Christian Medical College, Vellore - 632 004, Tamil Nadu, India
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Soofi SB, Habib MA, von Seidlein L, Khan MJ, Muhammad S, Bhutto N, Khan MI, Rasool S, Zafar A, Clemens JD, Nizami Q, Bhutta ZA. A comparison of disease caused by Shigella and Campylobacter species: 24 months community based surveillance in 4 slums of Karachi, Pakistan. J Infect Public Health 2011; 4:12-21. [PMID: 21338955 DOI: 10.1016/j.jiph.2010.10.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2009] [Revised: 10/10/2010] [Accepted: 10/15/2010] [Indexed: 10/18/2022] Open
Abstract
Despite the efforts of the international community diarrheal diseases still pose a major threat to children in children less than five years of age. Bacterial diarrhea has also emerged as a public health concern due to the proliferation of drug resistant species in many parts of the world. There is a paucity of population-based data about the incidence of shigellosis and Campylobacter infections in Pakistan. We report country specific results for Shigella diarrhea that were derived from a multicenter study conducted in six Asian countries. Disease surveillance was conducted over a 24 month period in urban slums of Karachi, Pakistan, a city with a population of 59,584. Cases were detected through passive detection in study treatment centers. Stool specimens or rectal swabs were collected from all consenting patients. Between January 2002 and December 2003 10,540 enteric infection cases were detected. The incidence rate of treated diarrhea in children under 5 was 488/1000/year. In children, 5 years and older, the diarrhea rate was 22/1000/year. 576 (7%) Campylobacter isolates were detected. The pre-dominant Campylobacter species was C. jenuni with an increase of 29/1000 year in children under 5 years. Shigella species were isolated from 394 of 8032 children under 5 years of age. Shigella flexneri was the dominant species (10/1000/year in children under 5 years) followed by Shigella sonnei (3.9/1000/year), Shigella boydii (2.0/1000/year) and Shigella dysenteriae (1.3/1000/year). Shigellosis and Campylobacter infection rates peaked during the second year of life. The incidence rate of shigellosis increased in old age but such a trend was not observed in Campylobacter infections. Of 394 shigellosis patients 123 (31%) presented with dysentery in contrast to only 54 (9%) of 576 patients with Campylobacter infections (p<0.001). Both Campylobacter infections and shigellosis are common in community settings of Pakistan but shigellosis presented more frequently with abdominal pain and dysentery than Campylobacter infections indicating that shigellosis may be a more severe illness than Campylobacter infections. Due to the increased and disease severity, drug resistant shigella have become a significant health problem; moreover it is a disease of poor and impoverished people who do not have the access to standard water and sanitary conditions, health care services or optimal treatment. In the face of these facts it is empirically important to develop a low cost effective vaccine that can protect these populations for a longer duration.
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Affiliation(s)
- Sajid Bashir Soofi
- Department of Paediatrics & Child Health, Aga Khan University, Pakistan.
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Seroepidemiological studies indicate frequent and repeated exposure toCampylobacterspp. during childhood. Epidemiol Infect 2010; 139:1361-8. [DOI: 10.1017/s0950268810002359] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
SUMMARYThe annual number of episodes of clinical gastroenteritis caused byCampylobacterspp. in The Netherlands is estimated to be 75 000, i.e. once per 200 person life-years. This number is based on extrapolation of culture results from population-based studies. The number of culture-confirmed cases ofCampylobacterinfection peaks in the first 3 years of life and again between the ages of 20 and 25 years. The seroepidemiology ofCampylobacterdescribes the relationship between age and exposure toCampylobacterand reflects both symptomatic and asymptomatic infections. Using a validated ELISA system, antibodies toCampylobacterwere measured in an age-stratified sample (n=456) of the PIENTER serum collection of the Dutch general population. The seroprevalence ofCampylobacterIgG antibodies increased with age, reaching almost 100% at age 20 years. Antibody levels steadily increased with age until young adulthood, suggesting repeated exposure toCampylobacter. In conclusion, seroepidemiological data demonstrated repeated exposures toCampylobacterthroughout life, most of which do not lead to clinical symptoms. From young adulthood, >95% of the population in The Netherlands had serological evidence for exposure toCampylobacter.
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Hassanzadeh P, Motamedifar M. Occurrence of Campylobacter jejuni in Shiraz, Southwest Iran. Med Princ Pract 2007; 16:59-62. [PMID: 17159366 DOI: 10.1159/000096142] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2005] [Accepted: 02/19/2006] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE To investigate the occurrence of Campylobacter jejuni among other bacterial agents of acute diarrhea. SUBJECTS AND METHODS Over a period of 3 months, 114 specimens of acute diarrhea were collected from patients aged 2-58 years referred to Nemazi Hospital, Shiraz, Iran. The samples were tested for bacterial pathogens causing acute diarrhea. RESULTS Of the 114 samples, 40 proved to be positive for bacterial enteric pathogens: C. jejuni 11 (9.6%), Salmonella spp.18 (15.8%) and Shigella spp. 11 (9.6%). Maximum prevalence of C. jejuni was observed in patients aged 11-15 years. Significantly more females than males were infected with all diarrheal agents (p <0.05). CONCLUSION This study confirmed the presence of C. jejuni as a significant cause of gastroenteritis in Shiraz, Southwest Iran.
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Affiliation(s)
- Parvin Hassanzadeh
- Department of Biology, School of Science, Shiraz University, Shiraz, Iran
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Burr DH, Rollins D, Lee LH, Pattarini DL, Walz SS, Tian JH, Pace JL, Bourgeois AL, Walker RI. Prevention of disease in ferrets fed an inactivated whole cell Campylobacter jejuni vaccine. Vaccine 2005; 23:4315-21. [PMID: 16005742 DOI: 10.1016/j.vaccine.2005.03.038] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2004] [Revised: 03/28/2005] [Accepted: 03/29/2005] [Indexed: 11/17/2022]
Abstract
Ferrets were used to demonstrate the potential of a killed whole cell vaccine prepared from Campylobacter jejuni to protect against disease. C. jejuni strain 81-176 was grown in BHI broth, formalin-fixed, and resuspended in PBS to a concentration of 10(10) cells per ml. This vaccine (CWC) or live organisms were delivered orally with a nasogastric tube into anesthetized animals treated to reduce gastric acidity and intestinal motility. When 5x10(10) CFU of the vaccine strain (Lior serotype 5) or one of two other serotypes, CGL-7 (Lior 4) or BT44 (Lior 9), was used to challenge the ferrets, all of the animals developed a mucoid diarrhea. If the animals had been challenged with 5x10(9) CFU of the homologous strain 1 month before challenge with 10(10) CFU, 80-100% protection against disease was seen. This protection was also obtained after an initial exposure to the 81-176 strain followed by challenge with either of the heterologous strains. CWC was used to see if protection demonstrated with the live organisms could be produced with the non-living preparation. When 10(9) cells of CWC was given as two doses 7 days apart with or without 25mug of a coadministered mucosal adjuvant, LT(R192G), only 40-60% of the animals were protected. If the regimen was changed to four doses given 48h apart, 80% of the animals were free of diarrhea after subsequent challenge. Increasing the number of cells in the four dose regimen to 10(10) cells did not improve protection. Animals given four doses of 10(10) cells combined with LT(R192G) were subsequently challenged with 10(10) cells of the homologous strain or the heterologous strain CGL-7. The CWC protected against both strains. Serum IgG antibody titers determined by ELISA showed little increase following the CWC four dose vaccination regimen, compared to animals given one dose of the live organism. On subsequent challenge, however, both CWC vaccinated and live-challenged ferrets showed comparable antibody titer increases above those obtained following the initial challenge or vaccination. Western blots were used to show that the immunodominant antigen in vaccinated animals was a 45kDa protein, while in ferrets challenged with live organisms the immunodominant antigen was a 62kDa protein. These data show that the CWC can be used to protect against disease caused by Campylobacter. They also show that protection and serum IgG responses do not depend upon the use of the mucosal adjuvant and that cross protection among some of the major serotypes of Campylobacter responsible for human disease is possible.
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14
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Walker RI. Considerations for development of whole cell bacterial vaccines to prevent diarrheal diseases in children in developing countries. Vaccine 2005; 23:3369-85. [PMID: 15837361 DOI: 10.1016/j.vaccine.2004.12.029] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2004] [Revised: 11/23/2004] [Accepted: 12/06/2004] [Indexed: 10/25/2022]
Abstract
Enteric pathogens constitute a major pediatric threat in the developing world through their impact on morbidity and mortality, physical and cognitive development and cause and effect relationship with malnutrition. Although many bacterial pathogens can cause diarrheal diseases, a group of less than 10 including Shigella spp., enterotoxigenic Escherichia coli (ETEC), Vibrio cholerae, and possibly, Campylobacter jejuni account for a significant percentage of these diseases in developing countries. Rotavirus is also a major cause of diarrheal diseases. Vaccines against these agents offer a potentially effective control measure against these diseases, but safe, practical, and effective vaccines for many of these agents have yet to be realized. Many vaccine development approaches are under investigation, but the one that is currently most advanced and that has been most widely applied to enteric pathogens is the use of orally administered live or killed whole pathogen preparations. If inactivated, these vaccines will probably be administered as multiple doses with approximately 10(10) to 10(11) total particles per dose, but they are relatively safe for oral administration. Further, they may not require a buffer for delivery and can be stored in liquid formulations. Fewer doses may be required for some live attenuated pathogen vaccines, but a buffer will most likely be required for oral delivery and the product must be stored in a dried formulation. Also, safety becomes more of a concern with live pathogens depending on the degree of attenuation, host immunocompetence, and the total number and kinds of attenuated pathogens which may be present in a combined agent vaccine. Both live and killed whole pathogen vaccines can be immunogenic and have the possibility to serve as vectors for other antigens. Although many organisms and serotypes are clinically important, by exploiting antigenic cross reactivity and using some pathogen components as vectors for cloned antigens of other pathogens, it could be possible to induce immunity against major enteric pathogens/serotypes with <10 whole pathogen components in a multi-agent vaccine. Safe and effective mucosal adjuvants may in the future be useful in whole pathogen vaccines, but they do not seem to be essential for immunization. Further, dietary supplements such as zinc, mixed routes of delivery and new regimens are under study which may in the future enhance further the effectiveness of the whole pathogen vaccines which now seem realizable in the near term. For this to happen, however, a coordinated and committed effort is necessary now to address the immunologic, regulatory, manufacturing, testing and implementation issues which will be involved in the realization of this important product to benefit children's health worldwide.
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Affiliation(s)
- Richard I Walker
- Division of Bacterial, Parasitic and Allergenic Products, Center for Biologics Evaluation and Research, Food and Drug Administration, 1401 Rockville Pike (HFM-425), Rockville, MD 20851-1448, USA.
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15
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Alam M, Ahmed M, Ali SS, Atiq M, Akhtar YN, Ansari A, Chaudhry FA, Bashir H, Farid-ul-Husnain S, Zafar A. Paediatric stool cultures: Seasonal variation in bacterial pathogens isolated in Karachi, Pakistan. Trop Doct 2005; 35:21-3. [PMID: 15712537 DOI: 10.1258/0049475053001831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Mahboob Alam
- The Aga Khan University Medical College, Karachi, Pakistan.
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16
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Alaniz ME, Lardone RD, Yudowski SL, Farace MI, Nores GA. Normally occurring human anti-GM1 immunoglobulin M antibodies and the immune response to bacteria. Infect Immun 2004; 72:2148-51. [PMID: 15039337 PMCID: PMC375194 DOI: 10.1128/iai.72.4.2148-2151.2004] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Anti-GM(1) antibodies of the immunoglobulin M (IgM) isotype are normal components of the antibody repertoire of adult human serum. Using a sensitive high-performance thin-layer chromatography (HPTLC) immunostaining assay, we found that these antibodies were absent in the umbilical vein and children <1 month of age but could be detected after 1 month of age. Although most of the children older than 6 months of age were positive, there were still a few negative children. The appearance of anti-GM(1) IgM antibodies showed a perfect concordance with two well-characterized antibacterial antibodies, anti-Forssman and anti-blood group A, which indicates a similar origin. We also studied IgM reactivity with lipopolysaccharides (LPSs) from gram-negative bacteria isolated from stool samples from healthy babies and from Escherichia coli HB101 in serum from individuals of different ages. We found a positive reaction with both LPSs in all the children more than 1 month of age analyzed, even in those that were negative for anti-GM(1) antibodies. Anti-GM(1) IgM antibodies were purified from adult serum by affinity chromatography and tested for the ability to bind LPSs from different bacteria. This highly specific preparation showed reactivity only with LPS from a strain of Campylobacter jejuni isolated from a patient with diarrhea. We conclude that normally occurring IgM antibodies are generated after birth, probably during the immune defense against specific bacterial strains.
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Affiliation(s)
- María E Alaniz
- Departamento de Química Biológica Dr. Ranwel Caputto, CIQUIBIC, CONICET, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Argentina
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17
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Abstract
Advances in public health have reduced the risk of contracting certain enteric diseases, but many remain, and new pathogens have emerged and/or recently have been discovered. The pathogenic agents are varied and consist of a variety of bacteria and select viruses and parasites. Selected use of microbiologic assays to detect these pathogens is encouraged. When tests are ordered non-judiciously, costs rapidly accrue. The age of the patient, time of year, travel history, and clinical presentation all provide clues to the etiologic agent. Microbiologic assays should be used judiciously to confirm or exclude the likely infectious agents.
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Affiliation(s)
- G W Procop
- Department of Clinical Microbiology, Cleveland Clinic Foundation, Cleveland, Ohio, USA.
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18
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Abstract
OBJECTIVE To describe clinical and laboratory data for, and to propose pathogenesis and management of, children from impoverished communities with Campylobacter bacteremia. METHODS A retrospective review of patient data generated from laboratory records in an urban tertiary care hospital in Soweto and a rural mission hospital in Eastern Transvaal, South Africa. Participants were 19 children presenting to either hospital with Campylobacter bacteremia. Clinical and laboratory data were collated. RESULTS Nineteen children with Campylobacter bacteremia were identified; all isolates were Campylobacter jejuni. Sixteen (84%) had malnutrition; 13 of these were severely malnourished. Thirteen (68%) were febrile at the time of bacteremia. Four children (21%) did not have diarrhea. The case fatality rate was 16% and may not have been influenced by aminoglycoside administration. CONCLUSION Malnourished children may be more likely to have gastrointestinal C. jejuni infection. Immunodeficiency and intestinal mucosal compromise secondary to malnutrition may render such children at increased risk of C. jejuni bacteremia and its consequences. C. jejuni bacteremia is potentially life-threatening and should be managed accordingly.
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Affiliation(s)
- R P Reed
- Shongwe Mission Hospital, South Africa
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19
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Tomayko JF, Korten V, Murray BE. DU-6859a, a new fluoroquinolone agent. Comparative in vitro activity against enteric pathogens and multiresistant outpatient Escherichia coli. Diagn Microbiol Infect Dis 1994; 20:45-7. [PMID: 7867298 DOI: 10.1016/0732-8893(94)90018-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The activity of DU-6859a, a new fluoroquinolone antimicrobial agent, was compared with that of ciprofloxacin by agar dilution susceptibility testing against enteric pathogens and multiresistant Escherichia coli. The results indicate that DU-6859a inhibits most of these organisms at concentrations similar to those of ciprofloxacin. DU-6859a showed increased activity compared to ciprofloxacin against Campylobacter species isolates.
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Affiliation(s)
- J F Tomayko
- Department of Internal Medicine, University of Texas Medical School at Houston 77030
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20
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Pazzaglia G, Widjaja S, Soebekti D, Tjaniadi P, Simanjuntak L, Lesmana M, Jennings G. Persistent, recurring diarrhea in a colony of orangutans (Pongo pygmaeus) caused by multiple strains of Campylobacter spp. Acta Trop 1994; 57:1-10. [PMID: 7942349 DOI: 10.1016/0001-706x(94)90087-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A colony of 10 orangutans (Pongo pygmaeus) experienced persistent, recurring diarrhea caused by multiple infections with Campylobacter jejuni and C. coli. Infections appeared to have occurred through several mechanisms, including fecal-oral transmission between orangutans, and possibly transmission by houseflies contaminated with the organisms from nearby chicken feces. Among the 14 fecal and environmental C. jejuni isolates, 4 different antibiotic susceptibility profiles were detected; there were also 4 different profiles among the 8 isolates of C. coli. In 5 orangutans, there were back-to-back infections by different strains of C. jejuni, suggesting that a single C. jejuni infection may not confer protective immunity against heterologous strains circulating in the same vicinity. Transmission was effectively interrupted by environmental modifications and a 7-day course of oral erythromycin.
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Affiliation(s)
- G Pazzaglia
- U.S. Naval Medical Research Unit No. 2, Jakarta, Indonesia
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21
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Paje-Villar E, Co BG, Caradang EH, Raymundo A, Lagamayo E, Lavadia E, Rigor E, Hart CA. Non-bacterial diarrhoea in children in the Philippines. ANNALS OF TROPICAL MEDICINE AND PARASITOLOGY 1994; 88:53-8. [PMID: 8192516 DOI: 10.1080/00034983.1994.11812835] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
In a 25-month prospective study of diarrhoeal disease in 236 hospitalized Filipino children under 12 years of age, a potential enteropathogen was detected in 235 cases (> 99%). Viruses, found in 169 cases (72%), were the predominant pathogens. Most of the virus infections [164 (69%) of the patients] were of rotavirus and 80% of these were in children under 2 years of age. Rotavirus infection was most prevalent in the cold months. Astrovirus and calicivirus were observed for the first time in the Philippines. Entero-invasive Escherichia coli (13% of patients), Salmonellae (6%) and Shigellae (3.4%) were the commonest bacterial enteropathogens. Cryptosporidium was detected in only six patients. Fever and vomiting, although significantly more prevalent in cases of bacterial diarrhoea than in viral, were not sufficiently sensitive or specific to be used to distinguish the two forms of diarrhoea. Presence of faecal leucocytes (> 5/higher-power field) proved highly sensitive (90%) and specific (84%) in detecting bacteria diarrhoea but reliance on this sign alone would have led to the misdiagnosis of one third of bacterial diarrhoeas.
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Affiliation(s)
- E Paje-Villar
- Department of Paediatrics, University of Santo Tomas, Manila, Philippines
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22
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Panigrahi P, Losonsky G, DeTolla LJ, Morris JG. Human immune response to Campylobacter jejuni proteins expressed in vivo. Infect Immun 1992; 60:4938-44. [PMID: 1399004 PMCID: PMC258251 DOI: 10.1128/iai.60.11.4938-4944.1992] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Campylobacter jejuni 81-176 grown in vivo in rabbit ileal loops expresses novel proteins that are not expressed under standard laboratory culture conditions. A new protein with a molecular mass of ca. 180 kDa is expressed at 14, 24, and 48 h of infection. Three other proteins, with molecular masses of ca. 66, 43, and 35 kDa, are overexpressed during different phases of infection. Expression of these proteins stops immediately during the first passage in laboratory media, and they do not elicit a human immune response. Two other proteins, with molecular masses of ca. 84 and 47 kDa, expressed 48 h after infection can be identified by using convalescent sera from human volunteers who were immune to C. jejuni infection upon rechallenge; these proteins were not visualized on sodium dodecyl sulfate-polyacrylamide gel electrophoresis gels by Coomassie blue staining or silver staining. Antibodies to the 84- and 47-kDa proteins are of the immunoglobulin G class. Both preinfection and convalescent human sera react strongly to the C. jejuni flagellin (a 58-kDa protein), suggesting the presence of cross-reactive antibodies to this protein in healthy humans. Major outer membrane protein and flagella may play a role in providing protection against C. jejuni disease, but our data suggest that there are other proteins expressed only during in vivo growth of the organism that elicit a strong immune response in human C. jejuni infections.
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Affiliation(s)
- P Panigrahi
- Department of Medicine, University of Maryland School of Medicine, Baltimore 21201
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23
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WALAN ASA, DAHLGREN CLAES, KIHLSTRÖM ERIK, STENDAHL OLLE, LOCK RONNY. Phagocyte killing ofCampylobacter jejuniin relation to oxidative activation. APMIS 1992. [DOI: 10.1111/j.1699-0463.1992.tb00893.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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24
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Bhadra RK, Dutta P, Bhattacharya SK, Dutta SK, Pal SC, Nair GB. Campylobacter species as a cause of diarrhoea in children in Calcutta. J Infect 1992; 24:55-62. [PMID: 1548418 DOI: 10.1016/0163-4453(92)90982-c] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
From 1985 to 1988, 857 children (aged between 1 day and 60 months) admitted to hospital with diarrhoea and 241 controls (aged between 5 days and 60 months) were examined for campylobacters and other enteric pathogens by means of conventional methods. The difference between the isolation rates of campylobacters in those cases in which no other enteric pathogen was found (4.8%) and controls (6.2%) was not significant (P greater than 0.05). Strains of Campylobacter jejuni/coli were isolated throughout the year with higher isolation rates during the summer and monsoon months. Mixed infections were very common. Watery diarrhoea (97.6% cases) was the most common clinical presentation of patients found to be infected solely by C. jejuni/coli. Most patients infected with campylobacters were mildly to moderately dehydrated. Biotype I of C. jejuni and C. coli was the dominant biotype associated with cases and controls. All strains of C. jejuni/coli, regardless of their source, were found to be sensitive to erythromycin. From this study, it appears that enteric infections with campylobacters among children in Calcutta are common but often asymptomatic.
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Affiliation(s)
- R K Bhadra
- National Institute of Cholera and Enteric Diseases, Beliaghata, Calcutta, India
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25
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Morris JG, Prado V, Ferreccio C, Robins-Browne RM, Bordun AM, Cayazzo M, Kay BA, Levine MM. Yersinia enterocolitica isolated from two cohorts of young children in Santiago, Chile: incidence of and lack of correlation between illness and proposed virulence factors. J Clin Microbiol 1991; 29:2784-8. [PMID: 1757549 PMCID: PMC270433 DOI: 10.1128/jcm.29.12.2784-2788.1991] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Yersinia enterocolitica was isolated from children in two cohorts in Santiago, Chile. In a cohort containing a cross section of children aged 0 to 4 years, Y. enterocolitica was isolated from stool samples of 1.1% of children with diarrhea and 0.2% of age-matched control children. In a subgroup of this cohort from which weekly stool samples were obtained from all children irrespective of clinical status, 6% of children had asymptomatic Yersinia infections. In a birth cohort (with a greater representation of children less than 1 year of age and a significantly higher rate of diarrhea), Y. enterocolitica was isolated from 1.9% of children with diarrhea and 0.6% of controls (P = 0.05). Biogroup 1A strains (which lacked traditional phenotypic and molecular markers for pathogenicity) were isolated from seven children with diarrhea but from no control children in the birth cohort (P = 0.02). All other isolates, including all isolates from asymptomatic children, were "pathogenic" strains in biogroup 4, serogroup O3; no association between these isolates and occurrence of disease was found. Y. enterocolitica is found among young children in Santiago, with asymptomatic infections not uncommon occurrences. However, questions about the association between previously described virulence factors and diarrheal illness remain.
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Affiliation(s)
- J G Morris
- Department of Medicine, University of Maryland School of Medicine, Baltimore 21201
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26
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Pavlovskis OR, Rollins DM, Haberberger RL, Green AE, Habash L, Strocko S, Walker RI. Significance of flagella in colonization resistance of rabbits immunized with Campylobacter spp. Infect Immun 1991; 59:2259-64. [PMID: 2050397 PMCID: PMC258004 DOI: 10.1128/iai.59.7.2259-2264.1991] [Citation(s) in RCA: 85] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Cross-protection among different Lior and Penner serogroups of Campylobacter spp. was studied. Rabbits were orally immunized by gastric feeding with Campylobacter spp., and 27 to 30 days later, they were challenged with matched or unmatched serogroups by the removable intestinal tie adult rabbit diarrhea (RITARD) procedure. When immunized animals were challenged with different Lior serotypes, no protection against colonization was seen; however, when challenged with homologous Lior serogroups, protection was demonstrated. Immune animals were colonized for an average of 1 day or less versus at least 6 days for nonimmune animals. Rabbits challenged with matched Penner-unmatched Lior strains showed only marginal protection. Our study also demonstrated that flagella are important in initiating colonization and eliciting protective immunity. Campylobacter coli VC167B3, an isogenic, nonflagellated mutant, did not colonize rabbits regardless of the route of administration. Single feeding of the mutant strain did not protect the host, whereas three feedings, 48 h apart, resulted in complete protection against the flagellated parent strain. When mutant strain immunized rabbits were challenged with other strains of the same Lior serotype, marginal protection was obtained. Immunogold labeling indicated that there is one or more antigens on the cell surface of the nonflagellated mutant which reacts with a polyclonal antiserum from organisms of the same Lior serogroup. These data implicated the flagellum as the cross-strain protective component of the Lior antigen complex.
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Affiliation(s)
- O R Pavlovskis
- Infectious Diseases Department, Naval Medical Research Institute, Bethesda, Maryland 20889
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27
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Haberberger RL, Ishak AR. Preliminary investigation of diarrhoeal diseases among children in Sanaa, Yemen Arab Republic. Trans R Soc Trop Med Hyg 1990; 84:861-2. [PMID: 2096525 DOI: 10.1016/0035-9203(90)90108-q] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Affiliation(s)
- R L Haberberger
- Department of Research Sciences, United States Naval Medical Research Unit No. 3, Cairo, Egypt
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28
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Russell RG, Sarmiento JI, Fox J, Panigrahi P. Evidence of reinfection with multiple strains of Campylobacter jejuni and Campylobacter coli in Macaca nemestrina housed under hyperendemic conditions. Infect Immun 1990; 58:2149-55. [PMID: 2365455 PMCID: PMC258790 DOI: 10.1128/iai.58.7.2149-2155.1990] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
A prospective bacteriologic study of 18 infant pig-tailed macaques (Macaca nemestrina) housed in a nursery facility in which Campylobacter spp. are endemic was undertaken to determine the epidemiology of infection and reinfection. The isolates of Campylobacter jejuni and C. coli cultured from 8 of the 18 infants were characterized by serotyping, DNA hybridization, and polyacrylamide gel electrophoresis protein profiles. The chronology of infection was indicative of multiple reinfections with different strains of C. jejuni and C. coli during the 12-month study of each infant. The duration of infection with a particular strain was 3 to 4 weeks. Infants were also infected with nalidixic acid-resistant campylobacters. These observations indicated that long-term infections under endemic conditions are caused by continual reinfection. C. jejuni or C. coli infection correlated with diarrhea in 5 of the 18 infants at 1 to 4 months of age.
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Affiliation(s)
- R G Russell
- Division of Animal Medicine, School of Medicine, University of Washington, Seattle 98195
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29
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Mahajan S, Rodgers FG. Isolation, characterization, and host-cell-binding properties of a cytotoxin from Campylobacter jejuni. J Clin Microbiol 1990; 28:1314-20. [PMID: 2199497 PMCID: PMC267926 DOI: 10.1128/jcm.28.6.1314-1320.1990] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
A 68,000-molecular-weight protein was isolated by polyacrylamide gel electrophoresis from the organism-free filtrate of a fully virulent clinical strain of Campylobacter jejuni. The eluted protein was heat labile, was inactivated at either pH 3.0 or 9.0, was sensitive to trypsin, and was lethal for fertile chicken eggs. It also had toxic effects on chicken embryo fibroblast, Chinese hamster ovary (CHO), and intestinal 407 (Int407) cells. A monoclonal antibody (CETPMAb4) raised to this eluted toxic protein (ETP) from C. jejuni abolished these toxic activities. Homology between C. jejuni ETP and Vibrio cholerae toxin was not observed in that specific antisera to each did not block their respective toxic activities. In enzyme-linked immunosorbent assays, ETP, unlike chlorea enterotoxin, did not bind to GM1 ganglioside. Furthermore, the C. jejuni toxin had cytotoxinlike properties and induced rounding of CHO cells. Binding of ETP to Int407 and primary chicken embryo fibroblast cells was maximal after 2 h as assessed by enzyme-linked immunosorbent assay, and this toxin adherence to host cell membranes was significantly reduced by prior treatment of the cells with proteolytic enzymes, neuraminidase, or glutaraldehyde but not by treatment with beta-galactosidase, lipase, Nonidet P-40, or sodium metaperiodate. In competitive binding assays, sugars, lectins, or GM1 ganglioside did not adversely influence uptake of ETP by these cells. These results suggest that the ETP produced by C. jejuni is a cytotoxin which binds to Int407 cells via a protein- or glycoproteinlike receptor on cell membranes and possesses properties dissimilar to those of V. cholerae toxin.
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Affiliation(s)
- S Mahajan
- Department of Microbiology, Spaulding Life Science Center, University of New Hampshire, Durham 03824
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30
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Georges-Courbot MC, Cassel-Beraud AM, Gouandjika I, Monges J, Georges AJ. A cohort study of enteric campylobacter infection in children from birth to two years in Bangui (Central African Republic). Trans R Soc Trop Med Hyg 1990; 84:122-5. [PMID: 2345912 DOI: 10.1016/0035-9203(90)90402-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
A cohort of 111 children from Bangui, Central African Republic, was followed for enteric campylobacter infection from birth until the age of 2 years. Stools were examined at each episode of diarrhoea, and bi-weekly up to the age of 6 months irrespective of the presence of diarrhoea. 349 episodes of diarrhoeal illness were recorded (1.6 per child-year). Campylobacters were isolated from 41 (11.7%) of the 349 episodes, but in half of them another enteric pathogen was also isolated. Campylobacters were statistically associated with diarrhoea only before the age of 6 months. Bi-weekly sampling up to this age detected 75 infections (1.3 per child-year), yet only 12 (16%) were associated with diarrhoea. Campylobacter coli was isolated slightly more often (51%) than C jejuni (49%); biotyping and serogrouping showed that no strain was especially associated with disease. Fewer children who had campylobacter infection before the age of 6 months suffered campylobacter diarrhoea between 6 and 24 months of age than those who did not, but the difference did not reach statistical significance. A significantly higher rate of isolation was found in the homes of infected children (human and animal contacts) than of non-infected children. Campylobacter infections were statistically associated with the presence of live poultry and the lack of piped water in homes.
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31
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Abstract
Twenty-one isolates were tested for their ability to adhere to and invade HEp-2 cells in vitro. Of the 21 organisms tested, 2 did not invade the HEp-2 cells, and 1 of these did not adhere to the epithelial cells. Campylobacter jejuni clinical isolates were more invasive than the nonclinical strains that were tested. When HEp-2 cells were treated with cytochalasin B, the invasiveness of C. jejuni was reduced, indicating active participation of the host cell in the uptake of these organisms. The number of intracellular C. jejuni isolates decreased when Campylobacter whole-cell lysates were absorbed onto HEp-2 cell monolayers. Experiments were also conducted to identify the functional sites of the antigens responsible for expression of Campylobacter invasion. Oxidation of lysates with sodium meta-periodate significantly affected its inhibitory capacity. This implies that the Campylobacter invasive ligand appears to be dependent upon an intact carbohydrate moiety.
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Affiliation(s)
- M E Konkel
- Department of Veterinary Science, University of Arizona, Tucson 85721
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32
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Georges-Courbot MC, Gouandjika I, Martin PM, Georges AJ. Biotype and Lior serogroup distribution of enteric Campylobacter isolated from children in Bangui (Central African Republic), and comparison with Penner serotypes. Res Microbiol 1989; 140:489-97. [PMID: 2623366 DOI: 10.1016/0923-2508(89)90070-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The new extended biotyping scheme of Lior as well as the slide agglutination technique were applied to 209 strains of enteric Campylobacter isolated from children in Bangui (Central African Republic). Three biotypes of C. jejuni and 2 biotypes of C. coli were identified among the strains; 31.1% were C. jejuni I, 11% C. jejuni II, 2.4% C. jejuni III, 44% C. coli I and 11.5% C. coli II. We were able to serotype 71.3% of the strains with 20 immune sera prepared against strains of Campylobacter isolated previously; 63% of the strains were distributed among the ten most common serogroups. No significant difference was observed in the distribution of biotypes or serogroups between strains from healthy and diarrhoeic children. Comparison of Lior serogroups with Penner serotypes showed that different Penner serotypes may correspond to a Lior serogroup and vice versa.
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33
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Martin PM, Mathiot J, Ipero J, Kirimat M, Georges AJ, Georges-Courbot MC. Immune response to Campylobacter jejuni and Campylobacter coli in a cohort of children from birth to 2 years of age. Infect Immun 1989; 57:2542-6. [PMID: 2744860 PMCID: PMC313483 DOI: 10.1128/iai.57.8.2542-2546.1989] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
A cohort of 111 children from Bangui, Central African Republic, was surveyed for enteric Campylobacter infections from birth to the age of 2 years; stools were examined biweekly in these children until 6 months of age and at least four times per year thereafter until 2 years of age and after each diarrheal episode. Blood samples were obtained at birth and at 3, 6, 9, 12, 18, and 24 months of age. Antibodies against glycine-extracted membrane antigens, purified flagella, and cholera toxin (CT) were assayed by an enzyme-linked immunosorbent assay. The results showed that titers of antibody against the three tested antigens increased in children between 6 and 12 months of age and that nearly all children were immunized by the age of 2 years. A significant fall in anti-flagellum (P less than 0.001) and anti-glycine extract antibodies (P less than 0.001) occurred between birth and age 3 months, and children who had Campylobacter infections during the first 6 months of life had significantly (P less than 0.02) less anti-flagellum antibodies at birth than did those who did not have Campylobacter infections during that time. Three-month-interval stratification showed that CT antibody titers at birth were significantly lower in children who developed Campylobacter infection than in controls (P = 0.05). Comparison of the immune response to a single Campylobacter episode showed that 46.6% of children with asymptomatic carriage did not respond to CT while only 5% of children with diarrhea-producing infection did not respond to CT (P less than 0.01), compared with 30% (P = 0.065) and 56% (P less than 0.01), respectively, of the age-matched controls. Antibodies to flagella seem to protect against enteric colonization by Campylobacter jejuni and Campylobacter coli.
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Affiliation(s)
- P M Martin
- Institut Pasteur de Bangui, Central African Republic
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34
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Figueroa G, Galeno H, Troncoso M, Toledo S, Soto V. Prospective study of Campylobacter jejuni infection in Chilean infants evaluated by culture and serology. J Clin Microbiol 1989; 27:1040-4. [PMID: 2473090 PMCID: PMC267479 DOI: 10.1128/jcm.27.5.1040-1044.1989] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
A prospective study of Campylobacter jejuni infection was performed during a 6-month period in a cohort of 198 Chilean infants. Surveillance was based on biweekly home visits by a team of trained nurses. C. jejuni colonization was studied by culturing stool samples from diarrheal episodes and paired asymptomatic controls and by performing an enzyme-linked immunosorbent assay developed to measure C. jejuni outer membrane protein polyvalent antibodies in a representative group of infants. C. jejuni was isolated from 30 of 299 diarrheal episodes (10%) and from 17 of 304 samples from asymptomatic infants (6%). Significantly higher (P less than 0.05) C. jejuni illness/infection ratios were found in infants less than 9 months old. Polyvalent antibodies to C. jejuni were found in 27 of 89 serum samples (30%). The lowest prevalence (4%) was observed among infants less than 9 months old, and the highest was found in patients older than 15 months (63%; P less than 0.01). Data obtained by analysis of paired serum samples revealed a significant increase in the number of seropositive individuals, from 8% on admission to 50% at the end of the protocol (P less than 0.001). The change in the immune status of these infants was associated with symptomatic infection in 9 of 18 cases. The antibody rise found in the remaining nine infants suggested the presence of asymptomatic C. jejuni infections. This inference was documented by the isolation of C. jejuni from stools of two of these infants when the infants were randomly studied while asymptomatic. This study points out the impact of C. jejuni-associated diarrheal episodes and the high frequency with which asymptomatic infections elicit specific antibodies in infants living in areas such as Chile.
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Affiliation(s)
- G Figueroa
- Microbiology Unit, University of Chile, Santiago
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35
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Russell RG, Blaser MJ, Sarmiento JI, Fox J. Experimental Campylobacter jejuni infection in Macaca nemestrina. Infect Immun 1989; 57:1438-44. [PMID: 2707853 PMCID: PMC313296 DOI: 10.1128/iai.57.5.1438-1444.1989] [Citation(s) in RCA: 79] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Experimental infection of four specific-pathogen-free Macaca nemestrina monkeys (aged 3.5 and 4.5 months) with Campylobacter jejuni 81-176 caused acute diarrheal illness, characterized by fluid diarrhea, bloody stools, and fecal leukocytes, which lasted for approximately 7 to 11 days. Histologic examination of intestinal biopsies showed acute colitis characterized by infiltration of the mucosa with neutrophils and lymphocytes, and cryptitis. There were no histologic changes in the small intestine. Excretion of C. jejuni was demonstrated for 2 to 4 weeks postchallenge. Plasma antibodies to C. jejuni group antigen were elevated after challenge. Only mild diarrhea occurred after rechallenge with the same strain or with a heterologous C. jejuni strain (79-168) followed by further elevation in specific immunoglobulins A, M, and G. Four 1-year-old juvenile M. nemestrina monkeys which had experienced multiple infections with Campylobacter spp. did not exhibit illness when challenged with C. jejuni 81-176. All had elevated immunoglobulin A, M, and G plasma antibodies prior to challenge, and these humoral antibody levels were indicative of the immunity to challenge. The results demonstrate that C. jejuni infection in M. nemestrina caused colitis with clinical and pathologic results similar to those found in humans and indicate that prior infection protects against subsequent challenge.
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Affiliation(s)
- R G Russell
- Division of Animal Medicine, School of Medicine, University of Washington, Seattle 98195
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36
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Calva E, Torres J, Vázquez M, Angeles V, de la Vega H, Ruíz-Palacios GM. Campylobacter jejuni chromosomal sequences that hybridize to Vibrio cholerae and Escherichia coli LT enterotoxin genes. Gene 1989; 75:243-51. [PMID: 2653963 DOI: 10.1016/0378-1119(89)90270-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Campylobacter jejuni is one of the main etiologic agents of gastrointestinal illness in developing and developed areas throughout the world. Isolation of enterotoxin-producing C. jejuni has been associated with clinical symptoms of a watery-secretory type of diarrhea. Although physiological and immunological relatedness has been demonstrated between the C. jejuni enterotoxin (CJT), the Vibrio cholerae enterotoxin (CT), and the heat-labile cholera-like Escherichia coli enterotoxin (LT), nucleotide sequence similarity between C. jejuni DNA and either the toxA, toxB, eltA or eltB genes remained to be shown. We found that binding to ganglioside GM1 prevented recognition of CJT by monoclonal antibodies directed to either CT or LT. This indicates antigenic similarity between the three enterotoxins in the ganglioside GM1-binding site. Therefore we searched for corresponding similarities at the DNA level and found, by oligodeoxynucleotide hybridization, C. jejuni chromosomal nucleotide sequences similar to the coding region for a postulated ganglioside GM1-binding site on toxB and eltB.
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Affiliation(s)
- E Calva
- Departamento de Biología Molecular, Universidad Nacional Autónoma de México, Cuernavaca, Morelos
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37
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Sjögren E, Ruiz-Palacios G, Kaijser B. Campylobacter jejuni isolations from Mexican and Swedish patients, with repeated symptomatic and/or asymptomatic diarrhoea episodes. Epidemiol Infect 1989; 102:47-57. [PMID: 2917617 PMCID: PMC2249303 DOI: 10.1017/s0950268800029678] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
The presence of different Campylobacter jejuni serotypes in Swedish patients with diarrhoea and in Mexican patients with or without diarrhoea was investigated with special reference to repeated isolations during the course of infection and to symptomatic and asymptomatic episodes. The study included 136 C. jejuni isolates from 62 Mexican children and 173 isolates from 68 Swedish patients. The bacteria were serotyped for heat-stable (HS) and heat-labile (HL) antigen. Swedish patients, all with symptoms, were in general only infected with one serotype and were rarely reinfected. Mexican patients on the other hand were in general infected with mixed serotypes and frequently reinfected without symptoms with new, different serotypes, a finding which is in concordance with a theory of an induced immunity to surface antigens.
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Affiliation(s)
- E Sjögren
- Department of Clinical Bacteriology, University of Göteborg, Sweden
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38
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Casalino M, Yusuf MW, Nicoletti M, Bazzicalupo P, Coppo A, Colonna B, Cappelli C, Bianchini C, Falbo V, Ahmed HJ. A two-year study of enteric infections associated with diarrhoeal diseases in children in urban Somalia. Trans R Soc Trop Med Hyg 1988; 82:637-41. [PMID: 3076719 DOI: 10.1016/0035-9203(88)90542-1] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
A hospital-based systematic sample of 1667 children with severe diarrhoeal disease was studied in Mogadishu, Somalia, throughout 1983 and 1984. One or more enteric pathogens were found in 61% of the patients. Rotavirus (25%), enterotoxigenic Escherichia coli (11%), Shigella spp. (9%), Aeromonas hydrophila (9%), Giardia lamblia trophozoites (8%), Campylobacter jejuni (8%), and Vibrio cholerae non-O1 (6%) were the most frequently identified pathogens. Age-specific detection rates of enteric pathogens and helminths, seasonal patterns, and relationship of some specific infections with feeding status and main clinical features have been defined for all the sample examined.
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Affiliation(s)
- M Casalino
- Dipartimento di Biologia Cellulare e dello Sviluppo, Università di Roma La Sapienza, Italy
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39
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NaeSs V, Johannessen AC, Hofstad T. Adherence ofCampylobacter jejuniandCampylobacter colito porcine intestinal brush border membranes. APMIS 1988. [DOI: 10.1111/j.1699-0463.1988.tb00930.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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40
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Moore MA, Blaser MJ, Perez-Perez GI, O'Brien AD. Production of a Shiga-like cytotoxin by Campylobacter. Microb Pathog 1988; 4:455-62. [PMID: 3193876 DOI: 10.1016/0882-4010(88)90030-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Cell lysates and culture supernatants of 36 Campylobacter isolates from patients with enteritis were tested for cytotoxic activity on HeLa cells. Cytotoxic activity was considered Shiga-like if neutralized by monoclonal antibody to the B subunit of Shiga-like toxin I of Escherichia coli and rabbit anti-Shiga toxin. Fifteen of the Campylobacter isolates produced no detectable cytotoxin, 10 produced a non-neutralizable cytotoxin, and 11 produced low levels of a cell-associated SLT. However, under low stringency conditions no hybridization was observed between a DNA fragment containing cloned SLT-I genes and restriction enzyme-digested total DNA from a Campylobacter strain that produced low levels of a Shiga-like toxin I. The Shiga-like toxin neutralizing titers in sera from 15 patients with C. jejuni infections, 5 patients infected with S. sonnei, and 20 healthy persons were then determined. No rise in neutralizing titer between acute and convalescent sera of patients with C. jejuni infection or S. sonnei infection was observed, although 27% of C. jejuni-infected patients, 40% of S. sonnei-infected patients, and 30% of the healthy controls had neutralizing activity in their sera. These data indicate that low levels of Shiga-like toxin are produced by some Campylobacter isolates but that SLT is genetically distinct from the SLT-I toxin produced at high levels by certain E. coli. The findings also suggest that exposure to SLTs is common in the adult population but not as a consequence of infection with C. jejuni or S. sonnei.
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Affiliation(s)
- M A Moore
- Department of Microbiology, Uniformed Services University of the Health Sciences, Bethesda, MD 20814-4799
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41
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Taylor DN, Echeverria P, Pitarangsi C, Seriwatana J, Bodhidatta L, Blaser MJ. Influence of strain characteristics and immunity on the epidemiology of Campylobacter infections in Thailand. J Clin Microbiol 1988; 26:863-8. [PMID: 3384911 PMCID: PMC266475 DOI: 10.1128/jcm.26.5.863-868.1988] [Citation(s) in RCA: 62] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
To determine how strain differences and immunity affect the clinical expression of Campylobacter infections, we conducted a study of acute diarrheal disease in Thailand in which specimens from children with Campylobacter infections were cultured weekly for up to 12 weeks to determine the serotype-specific length of time of convalescent-phase excretion and rate of reinfection. Levels of immunoglobulin G to cell-surface antigens of C. jejuni were determined in another population of healthy children who were closely related by age and location to the children in the diarrheal disease study. Campylobacter species were initially isolated from 18% of 586 children under 5 years old with diarrhea; most isolates in Thailand belonged to serotypes commonly found in developed countries. C. coli was significantly less often associated with symptomatic infections and with bloody diarrhea than C. jejuni (P less than 0.001 and P = 0.045, respectively). The peak age of isolation and the peak level of immunoglobulin G to Campylobacter species occurred before 2 years of age. The mean duration of convalescent-phase excretion was 14 +/- 2 (standard error of the mean) days for children less than 1 year old and 8 +/- 2 days for children 1 to 5 years old (P = 0.02, t test). Infection with another Campylobacter serotype was found in 34% of 105 children during the 12-week follow-up period. The rate of reinfection in these children was 15% (range, 8 to 22%) each week. Hyperendemic exposure to Campylobacter species in Thailand confers immunity to infection that is associated with an early peak in specific serum antibodies and an age-related decrease in the case-to-infection ratio and duration of convalescent-phase excretion but does not prevent asymptomatic infections.
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Affiliation(s)
- D N Taylor
- Department of Bacteriology, Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand
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42
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Mølbak K, Højlyng N, Gaarslev K. High prevalence of campylobacter excretors among Liberian children related to environmental conditions. Epidemiol Infect 1988; 100:227-37. [PMID: 3356221 PMCID: PMC2249218 DOI: 10.1017/s0950268800067364] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Campylobacter was the bacterial pathogen most prevalent in 859 children, aged 6-59 months, examined in a house-to-house diarrhoea survey in two Liberian communities. 44.9% of the children from an urban slum and 28.4% from a rural area were excretors. Since the prevalence of diarrhoea was very high and consequently many convalescent carriers were found, it was not possible to evaluate the pathogenic role of campylobacter. The excretor rate increased with age and was significantly correlated to the use of supplementary feeding, inversely correlated to the quality of the water supply, and also associated with helminthic infestation. Results from re-examination of 172 children suggested a high intensity of transmission. The findings all indicate the existence of a heavy environmental contamination with campylobacter, probably of both human and animal faecal origin.
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Affiliation(s)
- K Mølbak
- Malaria Research Laboratory, Statens Seruminstitut, Copenhagen S, Denmark
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43
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Burr DH, Caldwell MB, Bourgeois AL, Morgan HR, Wistar R, Walker RI. Mucosal and systemic immunity to Campylobacter jejuni in rabbits after gastric inoculation. Infect Immun 1988; 56:99-105. [PMID: 3335413 PMCID: PMC259241 DOI: 10.1128/iai.56.1.99-105.1988] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
The mucosal and systemic immune responses to Campylobacter jejuni were studied in rabbits receiving gastric inoculation with live organisms. A lavage procedure was used to facilitate repeated monitoring of the intestinal immune response to C. jejuni. Immunity to C. jejuni was determined by secondary challenge by using the removable intestinal tie adult rabbit diarrhea (RITARD) model and monitoring for resistance to colonization and bacteremia. Oral-gastric inoculation of normal rabbits produced a transient intestinal colonization without diarrhea. C. jejuni serotypes differed in their ability to colonize the intestines of rabbits and to stimulate primary intestinal and serum antibody responses. Animals previously colonized were resistant to recolonization and the development of bacteremia after homologous challenge by the RITARD procedure but were not resistant to heterologous challenges. Anticampylobacter intestinal and serum IgA titers before this secondary infection were the most reliable predictors of resistance to colonization and bacteremia.
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Affiliation(s)
- D H Burr
- Naval Medical Research Institute, Bethesda, Maryland 20814-5055
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44
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Guerrant RL, Wanke CA, Pennie RA, Barrett LJ, Lima AA, O'Brien AD. Production of a unique cytotoxin by Campylobacter jejuni. Infect Immun 1987; 55:2526-30. [PMID: 3653987 PMCID: PMC260740 DOI: 10.1128/iai.55.10.2526-2530.1987] [Citation(s) in RCA: 52] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Campylobacter jejuni is an important diarrheal pathogen worldwide; the mechanisms by which it causes disease remain unclear. Because of its association with inflammatory diarrhea, we postulated that C. jejuni might produce a cytotoxin similar to that produced by Shigella sp., enterohemorrhagic Escherichia coli O157, or Clostridium difficile. Filtrates of 12 polymyxin-treated isolates of C. jejuni were placed on HeLa cells (sensitive to Shiga toxin cytotoxicity) and Chinese hamster ovary (CHO) cells. Of 12 isolates of C. jejuni tested, 5 killed 50% of the cells at greater than or equal to 1:4 dilutions of filtered suspensions of 10(9) bacteria per ml; killing was similar in HeLa and CHO cells (the CHO cells being insensitive to Shiga cytotoxin). One isolate produced a titer of 1:32 to 1:128. The relative potency in HeLa cells was comparable to that of E. coli strains that produce intermediate amounts of Shiga-like toxin. The other seven strains showed no cytotoxic effect, nor did the control diluents, polymyxin B, or supernatants of C. jejuni not treated with polymyxin B. Sonication also released active cytotoxin, but slightly less well than did polymyxin. The cytotoxic effect was dose dependent. Concentration of the C. jejuni in suspension by 10-fold before treatment with polymyxin B resulted in a 10-fold increase in the 50% cytotoxic dose. The cytotoxin effect was not neutralized by Shiga toxin immune serum against either Shiga-like toxin I or II or by anti-Clostridium difficile antiserum. The C jejuni cytotoxin was partially labile to trypsin (0.25%) and to heating to greater than or equal to 60 degrees C. Cytotoxicity was retained in Scientific Products dialysis tubing D1615-1 (Mr cutoff, 12,000 to 14,000). Some isolates of C. jejuni release a substance lethal to HeLa or CHO cells in vitro that is distinct from Shiga-like or Clostridium difficile toxin. This cytotoxin may contribute to the colonic mucosal invasive process that characterizes C. jejuni enteritis.
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Affiliation(s)
- R L Guerrant
- Department of Medicine, University of Virginia School of Medicine, Charlottesville 22908
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45
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Tauxe RV, Pegues DA, Hargrett-Bean N. Campylobacter infections: the emerging national pattern. Am J Public Health 1987; 77:1219-21. [PMID: 3618859 PMCID: PMC1647014 DOI: 10.2105/ajph.77.9.1219] [Citation(s) in RCA: 32] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
In the United States, 8,837 Campylobacter isolates and eight outbreaks of Campylobacter infections were reported in 1984, a national isolation rate of 4.9/100,000. C. jejuni represented 99 per cent of reported isolates. Age-specific incidence was highest among infants (11/100,000), and young adults (8/100,000); infants in the second month of life were at highest risk. An unexplained nationwide November peak, not observed in previous years, occurred in all age groups and suggests there is an homogeneous nationwide source for this infection.
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46
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Hirschl AM, Lior H, Wolf D, Stanek G, Rotter ML, Wende L, Flamm H. Occurrence, serotypes and biotypes of thermophilic Campylobacters isolated in Vienna. ZENTRALBLATT FUR BAKTERIOLOGIE, MIKROBIOLOGIE, UND HYGIENE. SERIES A, MEDICAL MICROBIOLOGY, INFECTIOUS DISEASES, VIROLOGY, PARASITOLOGY 1987; 266:94-103. [PMID: 3425038 DOI: 10.1016/s0176-6724(87)80023-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
During the 1982-1986 period of all bacterial pathogens found to have caused diarrhoea, 35% belonged to the genus Campylobacter (C). Approximately 70% of the strains were isolated from persons under the age of 30 years, with a distinct peak of occurrence in the autumn. Biotyping and serotyping according to Lior yielded the following results: C. jejuni biotype I: 32.9%, C. jejuni biotype II: 48.6%, C. coli biotype I: 10.3%, C. coli biotype II: 8.2%. From the 121 strains serotyped, 118 (97.5%) were typable. The serotypes most frequently encountered were type 1 (15.7%), 4 (9.9%), 2 and 11 (7.4% each). There were 2 familial outbreaks of Campylobacter enteritis which could be completely elucidated by biotyping and serotyping. One outbreak was caused by C. jejuni biotype I serotype 11, the other by C. jejuni biotype II serotype 6. Considering the frequent occurrence of Campylobacter infections, isolates should be routinely typed. The existing typing methods and schemes are highly developed.
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Affiliation(s)
- A M Hirschl
- Hygiene Institute, University of Vienna, Austria
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47
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Lane EM, Batchelor RA, Bourgeois AL, Burr DH, Olson JG. Urine and faecal IgA response during naturally acquired infection with Campylobacter jejuni. Lancet 1987; 1:1141. [PMID: 2883461 DOI: 10.1016/s0140-6736(87)91694-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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48
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Georges-Courbot MC, Beraud-Cassel AM, Gouandjika I, Georges AJ. Prospective study of enteric Campylobacter infections in children from birth to 6 months in the Central African Republic. J Clin Microbiol 1987; 25:836-9. [PMID: 3584419 PMCID: PMC266099 DOI: 10.1128/jcm.25.5.836-839.1987] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
A survey of enteric Campylobacter infections was performed in Bangui, Central African Republic, with a cohort of 127 children from birth to 6 months of age by biweekly culture of stools; 82 infections were observed, and 41.7% of the children presented at least 1 infection before 6 months of age. Only 15.9% of the infected children had a diarrheic syndrome; moreover, 61.5% of these diarrheic children had another enteropathogen associated with Campylobacter species. In about half the cases, Campylobacter spp. were excreted for more than 4 days. More than half of the children had at least one diarrheic episode, for which an enteropathogen was identified in one third of the cases, before 6 months of age.
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49
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Young DM, Biao J, Zheng Z, Hadler J, Edberg SC. Isolation of Campylobacter jejuni in Hunan, the People's Republic of China: epidemiology and comparison of Chinese and American methodology. Diagn Microbiol Infect Dis 1986; 5:143-9. [PMID: 3522087 DOI: 10.1016/0732-8893(86)90116-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The incidence of infection with Campylobacter jejuni was determined in individuals with and without diarrheal disease seen at a hospital in Changsha, China. Stool specimens were cultured by two methods: one developed by the Chinese and a second control method used commonly in the United States. Among people with diarrhea, 18.7% of the 48 children and 8.7% of 104 adults were infected with Campylobacter jejuni. In the group without diarrhea, 8.6% of 105 children but none of 76 adults tested had the organism in their stool. Of the 27 total positive cultures, the Chinese method was positive in 26, compared with 21 for the control method. The Chinese culture method was at least as sensitive and specific as the American method. The biochemical characteristics and antibiotic sensitivities of Chinese isolates were similar to organisms isolated in other parts of the world. This study shows that Campylobacter jejuni is a common enteric pathogen in China and that the asymptomatic carrier state of this organism is significant in children.
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50
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Klipstein FA, Engert RF, Short HB. Enzyme-linked immunosorbent assays for virulence properties of Campylobacter jejuni clinical isolates. J Clin Microbiol 1986; 23:1039-43. [PMID: 3711295 PMCID: PMC268788 DOI: 10.1128/jcm.23.6.1039-1043.1986] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
To evaluate the capacity of enzyme-linked immunosorbent assays (ELISAs) to identify pathogenic strains among clinical fecal isolates of Campylobacter jejuni, 40 consecutively obtained strains from 39 sick patients and 1 asymptomatic person were tested by respective ELISAs for enterotoxin production in culture filtrates and for the invasive virulence antigen of bacterial cells. Of the 40 strains, 14 produced the enterotoxin; 15 strains, two of which were also enterotoxigenic, were invasive; and 11 strains had no detectable virulence property. The presence or absence of these virulence properties was confirmed by the demonstration that viable cells of all 12 randomly selected enterotoxigenic or invasive strains tested, but none of 9 nonpathogenic strains tested, caused fluid secretion in rat ligated ileal loops. All 12 patients examined who were infected with an invasive strain had grossly or microscopically evident blood cells in their stools or both, whereas none of those infected with an enterotoxigenic strain had overtly bloody diarrhea, and only 1 of 8 patients examined had microscopically evident blood cells in the stool. Twelve of the invasive, five of the enterotoxigenic, and three of the nonpathogenic strains also produced small amounts of cytotoxin, but there was no correlation between cytotoxin production and an abnormal response in rat ligated ileal loops. These observations show that enterotoxin production or invasiveness or both can be detected by ELISAs in three-fourths of C. jejuni fecal isolates and that there is usually a relationship between the specific pathogenic property of the infecting strain and the clinical mainfestations.
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