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Duarte A, Pereira L, Lemos ML, Pinto M, Rodrigues JC, Matias R, Santos A, Oleastro M. Epidemiological Data and Antimicrobial Resistance of Campylobacter spp. in Portugal from 13 Years of Surveillance. Pathogens 2024; 13:147. [PMID: 38392885 PMCID: PMC10893263 DOI: 10.3390/pathogens13020147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 01/29/2024] [Accepted: 02/02/2024] [Indexed: 02/25/2024] Open
Abstract
This study extensively analyzed campylobacteriosis surveillance in Portugal from 2009 to 2021, aiming to investigate demographic shifts, seasonal variations, and antimicrobial resistance (AMR) within Campylobacter isolates. Surveillance network and sentinel laboratory-based system data revealed a substantial under-notification of campylobacteriosis cases, suggesting an underestimated disease burden. Notification rates exhibited a paradigm shift, with a notable prevalence among the pediatric population, particularly in children aged 1-4 years, diverging from European reports. Additionally, an emerging trend of Campylobacter infections in younger adults (15-44 years) was observed. The study unveiled a unique seasonal distribution of cases, defying typical summer peaks seen elsewhere. AMR analysis revealed high resistance to ciprofloxacin and tetracycline, in both C. jejuni (93.7% and 79.2%, respectively) and C. coli (96.5% and 93.2%, respectively), stable throughout the studied period (2013-2021). C. coli exhibited significantly higher resistance to erythromycin, gentamicin, ampicillin and ertapenem compared to C. jejuni (p < 0.001). Multilocus Sequence Typing (MLST) data demonstrated the distribution of resistance markers across diverse sequence types, challenging the notion of a clonal origin for multidrug-resistant isolates. In conclusion, the study highlights the need for enhanced surveillance and raises concerns about alarming AMR levels, recommending the implementation of whole-genome sequencing (WGS)-based surveillance for a deeper comprehension of disease patterns and an evolving AMR landscape.
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Affiliation(s)
- Andreia Duarte
- Chemistry Department, Sciences Faculty, University of Beira Interior, Rua Marquês d’Ávila e Bolama, 6201-001 Covilhã, Portugal;
| | - Luísa Pereira
- CMA-UBI, Centre of Mathematics and Applications, University of Beira Interior, Rua Marquês d’Ávila e Bolama, 6201-001 Covilhã, Portugal;
| | - Maria-Leonor Lemos
- Infectious Diseases Department, National Institute of Health Doutor Ricardo Jorge (INSA), 1649-016 Lisbon, Portugal; (M.-L.L.); (J.C.R.); (R.M.); (A.S.)
- ICBAS-Institute of Biomedical Sciences Abel Salazar, University of Porto, 4050-313 Porto, Portugal
| | - Miguel Pinto
- Genomics and Bioinformatis Unit, National Institute of Health Doutor Ricardo Jorge (INSA), 1649-016 Lisbon, Portugal;
| | - João Carlos Rodrigues
- Infectious Diseases Department, National Institute of Health Doutor Ricardo Jorge (INSA), 1649-016 Lisbon, Portugal; (M.-L.L.); (J.C.R.); (R.M.); (A.S.)
| | - Rui Matias
- Infectious Diseases Department, National Institute of Health Doutor Ricardo Jorge (INSA), 1649-016 Lisbon, Portugal; (M.-L.L.); (J.C.R.); (R.M.); (A.S.)
| | - Andrea Santos
- Infectious Diseases Department, National Institute of Health Doutor Ricardo Jorge (INSA), 1649-016 Lisbon, Portugal; (M.-L.L.); (J.C.R.); (R.M.); (A.S.)
| | | | - Mónica Oleastro
- Infectious Diseases Department, National Institute of Health Doutor Ricardo Jorge (INSA), 1649-016 Lisbon, Portugal; (M.-L.L.); (J.C.R.); (R.M.); (A.S.)
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Grouteau G, Mignonat C, Marchou B, Martin-Blondel G, Glass O, Roubaud-Baudron C, Lansalot-Matras P, Alik S, Balardy L, De Nadaï T, Bénéjat L, Jehanne Q, Le Coustumier A, Lehours P. Campylobacter fetus foodborne illness outbreak in the elderly. Front Microbiol 2023; 14:1194243. [PMID: 37485516 PMCID: PMC10361658 DOI: 10.3389/fmicb.2023.1194243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Accepted: 06/12/2023] [Indexed: 07/25/2023] Open
Abstract
In June 2021, a cluster of seven cases of Campylobacter fetus infections occurred in a rehabilitation center and caused significant morbidity in elderly patients including five with bacteremia and two with osteoarticular medical device infections. The genetic identity identified by whole genome sequencing of the different Campylobacter fetus strains confirms a common source. This foodborne illness outbreak may have resulted from the consumption of unpasteurized dairy products, such as a cow's raw milk cheese resulting from a farm-to-fork strategy.
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Affiliation(s)
- Gaspard Grouteau
- Infectious and Tropical Diseases Department, Centre Hospitalier Tarbes-Lourdes, Lourdes, France
| | - Cédric Mignonat
- Rehabilitation Center, L'Arbizon, Bagnères de Bigorre, France
| | - Bruno Marchou
- Infectious and Tropical Diseases Department, Centre Hospitalier Tarbes-Lourdes, Lourdes, France
| | - Guillaume Martin-Blondel
- Infectious and Tropical Diseases Department, CHU de Toulouse, Toulouse, France
- Institut Toulousain des Maladies Infectieuses et Inflammatoires (Infinity) INSERM UMR1291—CNRS UMR5051—Université Toulouse III, Toulouse, France
| | - Olivier Glass
- Cellule de veille d'alerte et de gestion sanitaire, Agence Régionale de Santé Occitanie, Toulouse, France
| | - Claire Roubaud-Baudron
- Pôle de Gérontologie Clinique, CHU de Bordeaux, Bordeaux, France
- Bordeaux Institute of Oncology, BRIC U1312, INSERM, Université de Bordeaux, CHU de Bordeaux, Bordeaux, France
| | - Pauline Lansalot-Matras
- Infectious and Tropical Diseases Department, Centre Hospitalier Tarbes-Lourdes, Lourdes, France
| | - Simon Alik
- Infectious and Tropical Diseases Department, Centre Hospitalier Tarbes-Lourdes, Lourdes, France
| | | | | | - Lucie Bénéjat
- National Reference Center for Campylobacters and Helicobacters, Bacteriology Department, CHU de Bordeaux, Bordeaux, France
| | - Quentin Jehanne
- National Reference Center for Campylobacters and Helicobacters, Bacteriology Department, CHU de Bordeaux, Bordeaux, France
| | | | - Philippe Lehours
- Bordeaux Institute of Oncology, BRIC U1312, INSERM, Université de Bordeaux, CHU de Bordeaux, Bordeaux, France
- National Reference Center for Campylobacters and Helicobacters, Bacteriology Department, CHU de Bordeaux, Bordeaux, France
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3
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Franco J, Bénejat L, Ducournau A, Mégraud F, Lehours P, Bessède E. Evaluation of CAMPYLOBACTER QUIK CHEK™ rapid membrane enzyme immunoassay to detect Campylobacter spp. antigen in stool samples. Gut Pathog 2021; 13:4. [PMID: 33482881 PMCID: PMC7821655 DOI: 10.1186/s13099-021-00400-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Accepted: 01/15/2021] [Indexed: 12/30/2022] Open
Abstract
Campylobacter spp. enteritis is the most frequent bacterial enteritis in both adults and children and is sometimes a source of severe complications. Its diagnosis by culture suffers from a lack of sensitivity and delays the result, preventing an early initiation of optimal antibiotic therapy in some cases. Our aim was to test a new rapid immuno-enzymatic method for Campylobacter spp. diagnosis in comparison to a composite reference standard (CRS). Stool samples from the French National Reference Center for Campylobacter and Helicobacter were tested with the CAMPYLOBACTER QUIK CHEK™ (Abbott). The CRS used to consider a case positive for Campylobacter spp. was a positive culture and, in case of a negative culture, a positive result obtained with both an ELISA and a molecular test. One hundred and eight stools were included: 53 were positive according to the CRS. If performed alone, culture would have missed 5 cases which the CAMPYLOBACTER QUIK CHEK™ detected. Finally, the CAMPYLOBACTER QUIK CHEK™ showed a sensitivity of 96.2% and a specificity of 94.5% and is relevant for clinical practice. Given the characteristics of the new method, it can be used as a screening method for Campylobacter spp. detection.
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Affiliation(s)
- Justine Franco
- Centre National de Référence des Campylobacters et Helicobacters, Bordeaux University Hospital, Bordeaux, France
| | - Lucie Bénejat
- Centre National de Référence des Campylobacters et Helicobacters, Bordeaux University Hospital, Bordeaux, France
| | - Astrid Ducournau
- Centre National de Référence des Campylobacters et Helicobacters, Bordeaux University Hospital, Bordeaux, France
| | - Francis Mégraud
- Centre National de Référence des Campylobacters et Helicobacters, Bordeaux University Hospital, Bordeaux, France.,INSERM U1053 Bordeaux Research In Translational Oncology, Bordeaux, France
| | - Philippe Lehours
- Centre National de Référence des Campylobacters et Helicobacters, Bordeaux University Hospital, Bordeaux, France.,INSERM U1053 Bordeaux Research In Translational Oncology, Bordeaux, France
| | - Emilie Bessède
- Centre National de Référence des Campylobacters et Helicobacters, Bordeaux University Hospital, Bordeaux, France. .,INSERM U1053 Bordeaux Research In Translational Oncology, Bordeaux, France.
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4
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Gueudet T, Paolini MC, Buissonnière A, Trens A, Rousée JM, Lefranc M, Bénéjat L, Ducournau A, Mégraud F, Bessède E, Lehours P. How to Interpret a Positive Campylobacter PCR Result Using the BD MAX TM System in the Absence of Positive Culture? J Clin Med 2019; 8:jcm8122138. [PMID: 31817056 PMCID: PMC6947629 DOI: 10.3390/jcm8122138] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 11/27/2019] [Accepted: 11/29/2019] [Indexed: 12/26/2022] Open
Abstract
The aim of this study was to evaluate, using two independent polymerase chain reaction (PCR) formats, the results of Campylobacter detection by the BD MAXTM Enteric Bacterial Panel PCR (Becton Dickinson, Le Pont de Claix, France) in the absence of positive culture. A total of 77 samples found positive for Campylobacter on BD MAXTM but negative by culture were studied. Upon reception, one in-house real-time-PCR for Campylobacter sp. and a PCR with the RIDAGENE Bacterial Stool Panel (r-biopharm, Darmstadt, Germany) were performed. The data obtained using these two PCR formats were evaluated with respect to the cycle threshold (Ct) and fluorescence intensity values (FI) obtained on BD MAXTM. Ct and FI values were also obtained for 80 positive Campylobacter cases by culture. Among the 77 samples, 33 were positive with the two PCRs, and 37 remained negative. For the 33 double-positive PCRs samples, the Ct values obtained on BD MAXTM were lower than 30 in 93.9%, and FI > 2000 for 97% of cases. For the 37 double-negative PCRs samples, the Ct values obtained on BD MAXTM were <30 in only 18.9%, however FI were >2000 for 40.5% of cases. Positive culture cases had Ct values < 30 in 96.2% and FI > 2000 in 98.8%. We showed that the Ct values obtained on BD MAXTM can help to interpret the results. Almost 96% of the Campylobactersp. cases detected by culture or with the two reference PCRs positive showed a Ct value on BD MAXTM, meaning that stools detected as positive with BD MAXTM and having a Ct > 30 may be false positives.
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Affiliation(s)
- Thomas Gueudet
- Laboratoire SCHUH, BIO67-BIOSPHERE, 67000 Strasbourg, France; (T.G.); (A.T.); (J.M.R.)
| | | | - Alice Buissonnière
- CHU Pellegrin, Laboratoire de Bactériologie, CNR Campylobacters et Hélicobacters, 33076 Bordeaux, France; (A.B.); (L.B.); (A.D.); (F.M.); (E.B.)
| | - Anne Trens
- Laboratoire SCHUH, BIO67-BIOSPHERE, 67000 Strasbourg, France; (T.G.); (A.T.); (J.M.R.)
| | - Jean Marc Rousée
- Laboratoire SCHUH, BIO67-BIOSPHERE, 67000 Strasbourg, France; (T.G.); (A.T.); (J.M.R.)
| | | | - Lucie Bénéjat
- CHU Pellegrin, Laboratoire de Bactériologie, CNR Campylobacters et Hélicobacters, 33076 Bordeaux, France; (A.B.); (L.B.); (A.D.); (F.M.); (E.B.)
| | - Astrid Ducournau
- CHU Pellegrin, Laboratoire de Bactériologie, CNR Campylobacters et Hélicobacters, 33076 Bordeaux, France; (A.B.); (L.B.); (A.D.); (F.M.); (E.B.)
| | - Francis Mégraud
- CHU Pellegrin, Laboratoire de Bactériologie, CNR Campylobacters et Hélicobacters, 33076 Bordeaux, France; (A.B.); (L.B.); (A.D.); (F.M.); (E.B.)
- INSERM UMR1053 BaRITOn, 33076 Bordeaux, France
| | - Emilie Bessède
- CHU Pellegrin, Laboratoire de Bactériologie, CNR Campylobacters et Hélicobacters, 33076 Bordeaux, France; (A.B.); (L.B.); (A.D.); (F.M.); (E.B.)
- INSERM UMR1053 BaRITOn, 33076 Bordeaux, France
| | - Philippe Lehours
- CHU Pellegrin, Laboratoire de Bactériologie, CNR Campylobacters et Hélicobacters, 33076 Bordeaux, France; (A.B.); (L.B.); (A.D.); (F.M.); (E.B.)
- INSERM UMR1053 BaRITOn, 33076 Bordeaux, France
- Correspondence: ; Tel.: +33-556-795-977; Fax: +33-557-821-977
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Different latent class models were used and evaluated for assessing the accuracy of campylobacter diagnostic tests: overcoming imperfect reference standards? Epidemiol Infect 2018; 146:1556-1564. [PMID: 29945689 PMCID: PMC6090718 DOI: 10.1017/s0950268818001723] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
In the absence of perfect reference standard, classical techniques result in biased diagnostic accuracy and prevalence estimates. By statistically defining the true disease status, latent class models (LCM) constitute a promising alternative. However, LCM is a complex method which relies on parametric assumptions, including usually a conditional independence between tests and might suffer from data sparseness. We carefully applied LCMs to assess new campylobacter infection detection tests for which bacteriological culture is an imperfect reference standard. Five diagnostic tests (culture, polymerase chain reaction and three immunoenzymatic tests) of campylobacter infection were collected in 623 patients from Bordeaux and Lyon Hospitals, France. Their diagnostic accuracy were estimated with standard and extended LCMs with a thorough examination of models goodness-of-fit. The model including a residual dependence specific to the immunoenzymatic tests best complied with LCM assumptions. Asymptotic results of goodness-of-fit statistics were substantially impaired by data sparseness and empirical distributions were preferred. Results confirmed moderate sensitivity of the culture and high performances of immunoenzymatic tests. LCMs can be used to estimate diagnostic tests accuracy in the absence of perfect reference standard. However, their implementation and assessment require specific attention due to data sparseness and limitations of existing software.
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Evaluation of the Diagnostic Accuracy of Two Immunochromatographic Tests Detecting Campylobacter in Stools and Their Role in Campylobacter Infection Diagnosis. J Clin Microbiol 2018; 56:JCM.01567-17. [PMID: 29436423 DOI: 10.1128/jcm.01567-17] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Accepted: 01/24/2018] [Indexed: 11/20/2022] Open
Abstract
The detection of campylobacters in stools is performed essentially by culture, but this technique has a low sensitivity. New detection methods are now available. Among them, immunochromatography tests (ICTs) are very attractive in that they offer a result within 15 min. However, previous studies suggest that these tests have a relatively low specificity. The objective of this study was to evaluate the performance of these tests. During the study period, all patients who consulted the emergency units and had a stool culture were included. Their stool samples were tested with two ICTs, Ridaquick Campylobacter and ImmunoCard STAT! Campy. Stools were also tested by a home-made PCR and two commercially available enzyme-linked immunosorbent assays (ELISAs) when one of the ICTs was positive. The composite reference standard (CRS) was defined as positive if the culture was positive or, in case of a negative culture, if the PCR and one of the ELISAs were positive simultaneously. Three hundred and five patients were included. Among the 50 positive specimens with Ridaquick Campylobacter, 47 were considered true positives by the CRS, corresponding to a positive predictive value (PPV) of 94.0%. Among the 52 positive specimens with ImmunoCard STAT! Campy, 44 were considered true positives by the CRS, corresponding to a PPV of 84.6%. The negative predictive values were estimated at 94.9 and 92.4% for the Ridaquick Campylobacter and ImmunoCard STAT! Campy tests, respectively. ICTs appear to be very efficient and allow a very rapid detection of campylobacters, which is important for treating early campylobacter infections with an adapted antibiotherapy.
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Vicente-Martins S, Oleastro M, Domingues FC, Ferreira S. Arcobacter spp. at retail food from Portugal: Prevalence, genotyping and antibiotics resistance. Food Control 2018. [DOI: 10.1016/j.foodcont.2017.09.024] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Whitehouse CA, Young S, Li C, Hsu CH, Martin G, Zhao S. Use of whole-genome sequencing for Campylobacter surveillance from NARMS retail poultry in the United States in 2015. Food Microbiol 2018. [PMID: 29526197 DOI: 10.1016/j.fm.2018.01.018] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Whole genome sequencing (WGS) has become a rapid and affordable tool for public health surveillance and outbreak detection. In this study, we used the Illuminia MiSeq® to sequence 589 Campylobacter isolates obtained in 2015 from retail poultry meats as part of the National Antimicrobial Resistance Monitoring System (NARMS). WGS data were used to identify the Campylobacter species and to compare the concordance between resistance genotypes and phenotypes. WGS accurately identified 386 C. jejuni and 203 C. coli using gyrA sequence information. Ten resistance genes, including tetO, blaOXA-61, aph(2″)-Ic, aph(2″)-If, aph(2″)-Ig, aph(3')-III, ant(6)-1a, aadE, aph(3")-VIIa, and Inu(C), plus mutations in housekeeping genes (gyrA at position 86, 23S rRNA at position 2074 and 2075), were identified by WGS analysis. Overall, there was a high concordance between phenotypic resistance to a given drug and the presence of known resistance genes. Concordance between both resistance and susceptible phenotypes and genotype was 100% for ciprofloxacin, nalidixic acid, gentamicin, azithromycin, and florfenicol. A few discrepancies were observed for tetracycline, clindamycin, and telithromycin. The concordance between resistance phenotype and genotype ranged from 67.9% to 100%; whereas, the concordance between susceptible phenotype and genotype ranged from 98.0% to 99.6%. Our study demonstrates that WGS can correctly identify Campylobacter species and predict antimicrobial resistance with a high degree of accuracy.
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Affiliation(s)
- Chris A Whitehouse
- Center for Veterinary Medicine, U.S. Food and Drug Administration, Laurel, MD 20708, USA.
| | - Shenia Young
- Center for Veterinary Medicine, U.S. Food and Drug Administration, Laurel, MD 20708, USA
| | - Cong Li
- Center for Veterinary Medicine, U.S. Food and Drug Administration, Laurel, MD 20708, USA
| | - Chih-Hao Hsu
- Center for Veterinary Medicine, U.S. Food and Drug Administration, Laurel, MD 20708, USA
| | - Gordon Martin
- Center for Veterinary Medicine, U.S. Food and Drug Administration, Laurel, MD 20708, USA
| | - Shaohua Zhao
- Center for Veterinary Medicine, U.S. Food and Drug Administration, Laurel, MD 20708, USA
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Jribi H, Sellami H, Mariam S, Smaoui S, Ghorbel A, Hachicha S, Benejat L, Messadi-Akrout F, Mégraud F, Gdoura R. Isolation and Identification of Campylobacter spp. from Poultry and Poultry By-Products in Tunisia by Conventional Culture Method and Multiplex Real-Time PCR. J Food Prot 2017; 80:1623-1627. [PMID: 28853632 DOI: 10.4315/0362-028x.jfp-16-321] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Thermophilic Campylobacter spp. are one of the primary causes of bacterial human diarrhea. The consumption of poultry meats, by-products, or both is suspected to be a major cause of human campylobacteriosis. The aims of this study were to determine the prevalence of thermophilic Campylobacter spp. in fresh poultry meat and poultry by-products by conventional culture methods and to confirm Campylobacter jejuni and Campylobacter coli isolates by using the multiplex PCR assay. Two hundred fifty fresh poultry samples were collected from a variety of supermarkets and slaughterhouses located in Sfax, Tunisia, including chicken (n =149) and turkey (n =101). The samples were analyzed using conventional microbiological examinations according to the 2006 International Organization for Standardization method (ISO 10272-1) for Campylobacter spp. Concurrently, a real-time PCR was used for identification of C. jejuni and C. coli . Of the 250 samples of poultry meat and poultry by-products, 25.6% (n = 64) were contaminated with Campylobacter spp. The highest prevalence of Campylobacter spp. was found in chicken meat (26.8%) followed by turkey meat (23.7%). Among the different products, poultry breasts showed the highest contamination (36.6%) followed by poultry by-products (30%), poultry wings (28%) and poultry legs (26%) showed the lowest contamination, and no contamination was found on neck skin. Of the 64 thermophilic Campylobacter isolates, C. jejuni (59.7%) was the most frequently isolated species and 10.9% of the isolates were identified as C. coli . All of the 64 Campylobacter isolates identified by the conventional culture methods were further confirmed by PCR. The seasonal peak of Campylobacter spp. contamination was in the warm seasons (spring and summer). The study concluded that high proportions of poultry meat and poultry by-products marketed in Tunisia are contaminated by Campylobacter spp. Furthermore, to ensure food safety, poultry meats must be properly cooked before consuming.
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Affiliation(s)
- Hela Jribi
- Laboratoire de Recherche Toxicologie-Microbiologie Environnementale et Santé (LRES06), Faculté des Sciences de Sfax, Université de Sfax, Tunisia
| | - Hanen Sellami
- Laboratoire de Recherche Toxicologie-Microbiologie Environnementale et Santé (LRES06), Faculté des Sciences de Sfax, Université de Sfax, Tunisia
| | - Siala Mariam
- Laboratoire de Recherche Toxicologie-Microbiologie Environnementale et Santé (LRES06), Faculté des Sciences de Sfax, Université de Sfax, Tunisia
| | - Salma Smaoui
- Regional Laboratory of Hygiene, Hedi Chaker University Hospital, Sfax, Tunisia
| | - Asma Ghorbel
- Regional Laboratory of Hygiene, Hedi Chaker University Hospital, Sfax, Tunisia
| | - Salma Hachicha
- Regional Laboratory of Hygiene, Hedi Chaker University Hospital, Sfax, Tunisia
| | - Lucie Benejat
- Université de Bordeaux, National Reference Center for Campylobacters and Helicobacters, Laboratoire de Bactériologie, Bordeaux, France.,CHU de Bordeaux, Laboratoire de Bactériologie, 33076 Bordeaux, France
| | | | - Francis Mégraud
- Université de Bordeaux, National Reference Center for Campylobacters and Helicobacters, Laboratoire de Bactériologie, Bordeaux, France.,CHU de Bordeaux, Laboratoire de Bactériologie, 33076 Bordeaux, France
| | - Radhouane Gdoura
- Laboratoire de Recherche Toxicologie-Microbiologie Environnementale et Santé (LRES06), Faculté des Sciences de Sfax, Université de Sfax, Tunisia
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Mégraud F, Musso D, Drancourt M, Lehours P. Curved and Spiral Bacilli. Infect Dis (Lond) 2017. [DOI: 10.1016/b978-0-7020-6285-8.00182-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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11
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Ménard A, Buissonnière A, Prouzet-Mauléon V, Sifré E, Mégraud F. The GyrA encoded gene: A pertinent marker for the phylogenetic revision of Helicobacter genus. Syst Appl Microbiol 2015; 39:77-87. [PMID: 26829999 DOI: 10.1016/j.syapm.2015.09.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Revised: 07/30/2015] [Accepted: 09/18/2015] [Indexed: 12/12/2022]
Abstract
Phylogeny of Epsilonproteobacteria is based on sequencing of the 16S rRNA gene. However, this gene is not sufficiently discriminatory in Helicobacter species and alternative markers would be useful. In this study, the 16S rRNA, gyrA, hsp60, gyrB, and ureA-ureB gene sequences, as well as GyrA, HSP60 and GyrB protein sequences were analyzed as tools to support Helicobacter species phylogeny: 72 Helicobacter strains, belonging to 41 species of which 36 are validated species, were included. Results of the phylogenetic reconstructions of the GyrA gene encoded protein (approximately 730 residues) indicated the most stable trees to bootstrap resampling with a good separation of Helicobacter taxa, especially between gastric and enterohepatic species. Moreover, the GyrA tree revealed high similarity with that of the gyrB and ureA-ureB genes (restricted to urease-positive Helicobacter species). However, some differences in clustering were observed when compared to the hsp60 and 23S rRNA gene trees. Altogether, these revised phylogenies (except the 16S rRNA gene for enterohepatic Helicobacters) enabled reliable clustering of Helicobacter cinaedi and 'Flexispira' strains, determined a reliable position for Helicobacter mustelae (except the hsp60 gene) and for novel Helicobacter species proposed such as 'Helicobacter sanguini', 'Helicobacter apodemus' or 'Helicobacter winghamensis', and suggest that Helicobacter species MIT 09-6949 and MIT 05-5293 isolated from rodents constitute novel species. Although they are not commonly used to study the phylogeny of Epsilonproteobacteria, protein sequences and, in particular, the GyrA protein sequence may constitute pertinent phylogenetic markers for Helicobacter genus.
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Affiliation(s)
- Armelle Ménard
- Université de Bordeaux, Laboratoire de Bactériologie, Centre National de Référence des Helicobacters et Campylobacters, F33076 Bordeaux, France(1); INSERM U853, F33076 Bordeaux, France.
| | - Alice Buissonnière
- Université de Bordeaux, Laboratoire de Bactériologie, Centre National de Référence des Helicobacters et Campylobacters, F33076 Bordeaux, France(1); INSERM U853, F33076 Bordeaux, France
| | - Valérie Prouzet-Mauléon
- Université de Bordeaux, Laboratoire de Bactériologie, Centre National de Référence des Helicobacters et Campylobacters, F33076 Bordeaux, France(1)
| | - Elodie Sifré
- Université de Bordeaux, Laboratoire de Bactériologie, Centre National de Référence des Helicobacters et Campylobacters, F33076 Bordeaux, France(1); INSERM U853, F33076 Bordeaux, France
| | - Francis Mégraud
- Université de Bordeaux, Laboratoire de Bactériologie, Centre National de Référence des Helicobacters et Campylobacters, F33076 Bordeaux, France(1); INSERM U853, F33076 Bordeaux, France
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Silva F, Nerín C, Domingues FC. Stilbene phytoallexins inclusion complexes: A natural-based strategy to control foodborne pathogen Campylobacter. Food Control 2015. [DOI: 10.1016/j.foodcont.2015.01.039] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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13
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Ragimbeau C, Colin S, Devaux A, Decruyenaere F, Cauchie HM, Losch S, Penny C, Mossong J. Investigating the host specificity of Campylobacter jejuni and Campylobacter coli by sequencing gyrase subunit A. BMC Microbiol 2014; 14:205. [PMID: 25163418 PMCID: PMC4156964 DOI: 10.1186/s12866-014-0205-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Accepted: 07/18/2014] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Surveillance and field investigations of Campylobacter infections require molecular tools with genetic markers appropriate for tracing purposes, i.e. based on the principle that some Campylobacter lineages acquire a host signature under adaptive selection pressure. We developed a sequence-based method targeting the quinolone resistance determining region within the subunit A of DNA gyrase (gyrA). Host specificity was evaluated by characterizing two collections of Campylobacter jejuni (N = 430) and Campylobacter coli (N = 302) originating from surface waters, domestic mammals and poultry. RESULTS Based on nucleotide identity, a total of 80 gyrA alleles were observed. Thirty nine alleles assigned to C. coli encoding two peptides fell into three clades: two associated with surface waters and one associated with domestic mammals and poultry. The variability in GC content generated by synonymous mutations suggested that surface waters isolates originated from two distinct ecological niches. A total of 42 alleles were recorded from C. jejuni strains and encoded 8 peptides including one lying in a distinct lineage associated with wildlife. Seven of the 23 alleles encoding peptide #1 displayed the synonymous mutation G408A not identified in poultry isolates. By contrast, the substitution Ser22Gly observed in 4 different peptide groups was significantly associated with domestic birds (P = 0.001). The change in amino acid sequences Thr86Ile conferring resistance to quinolones was significantly associated with poultry (P < 0.001) in both C. jejuni and C. coli with 38.7% and 67.9% of quinolone-resistant strains, respectively. CONCLUSIONS The gyrA typing method presented here is an informative tool as sequences appear to be predictive of particular ecological niches. Combined with multi-locus sequence typing, it could increase the resolution of source attribution, and combined with porA/flaA typing it could be suitable for detecting temporal clusters of human cases. All gyrA alleles identified were deposited in the freely accessible online database http://pubmlst.org/campylobacter.
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Affiliation(s)
- Catherine Ragimbeau
- />National Health Laboratory, Surveillance and Epidemiology of Infectious Diseases, 1 rue Louis Rech, Dudelange, L-3555 Luxembourg
| | - Stephanie Colin
- />Centre de Recherche Public Santé, 1A-B rue Thomas Edison, Strassen, L-1445 Luxembourg
| | - Anthony Devaux
- />National Health Laboratory, Surveillance and Epidemiology of Infectious Diseases, 1 rue Louis Rech, Dudelange, L-3555 Luxembourg
| | - Frédéric Decruyenaere
- />National Health Laboratory, Bacteriology- Parasitology- Mycology, 1 rue Louis Rech, Dudelange, L-3555 Luxembourg
| | - Henry-Michel Cauchie
- />Département Environnement et Agro-Biotechnologies, Centre de Recherche Public – Gabriel Lippmann, 41 rue du Brill, Belvaux, L-4422 Luxembourg
| | - Serge Losch
- />Veterinary Medecine Laboratory, 54, av. Gast Diderich, Luxembourg, L-1420 Luxembourg
| | - Christian Penny
- />Département Environnement et Agro-Biotechnologies, Centre de Recherche Public – Gabriel Lippmann, 41 rue du Brill, Belvaux, L-4422 Luxembourg
| | - Joël Mossong
- />National Health Laboratory, Surveillance and Epidemiology of Infectious Diseases, 1 rue Louis Rech, Dudelange, L-3555 Luxembourg
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Duarte A, Santos A, Manageiro V, Martins A, Fraqueza MJ, Caniça M, Domingues FC, Oleastro M. Human, food and animal Campylobacter spp. isolated in Portugal: high genetic diversity and antibiotic resistance rates. Int J Antimicrob Agents 2014; 44:306-13. [PMID: 25130097 DOI: 10.1016/j.ijantimicag.2014.06.012] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Revised: 06/02/2014] [Accepted: 06/13/2014] [Indexed: 10/25/2022]
Abstract
Infections by Campylobacter jejuni and Campylobacter coli are considered the major cause of bacterial gastroenteritis in humans, with food being the main source of infection. In this study, a total of 196 Campylobacter strains (125 isolates from humans, 39 from retail food and 32 from food animal sources) isolated in Portugal between 2009 and 2012 were characterised by multilocus sequence typing (MLST) and flaA short variable region (SVR) typing. Susceptibility to six antibiotics as well as the mechanisms underlying antibiotic resistance phenotypes was also studied. Based on MLST typing, C. coli strains were genetically more conserved, with a predominant clonal complex (CC828), than C. jejuni strains. In contrast, C. coli isolates were genetically more variable than C. jejuni with regard to flaA-SVR typing. A high rate of resistance was observed for quinolones (100% to nalidixic acid, >90% to ciprofloxacin) and, in general, resistance was more common among C. coli, especially for erythromycin (40.2% vs. 6.7%). In addition, most isolates (86%) were resistant to multiple antimicrobial families. Besides the expected point mutations associated with antibiotic resistance, detected polymorphisms in the cmeABC locus likely play a role in the multiresistant phenotype. This study provides for the first time an overview of the genetic diversity of Campylobacter strains from Portugal. It also shows a worrying antibiotic multiresistance rate and the emergence of Campylobacter strains resistant to antibiotics of human use.
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Affiliation(s)
- Andreia Duarte
- CICS-UBI-Health Sciences Research Centre, University of Beira Interior, Avenida Infante D. Henrique, 6200-506 Covilhã, Portugal
| | - Andrea Santos
- National Reference Laboratory for Gastrointestinal Infections, Department of Infectious Diseases, National Institute of Health Dr Ricardo Jorge, Av. Padre Cruz, 1649-016 Lisbon, Portugal
| | - Vera Manageiro
- National Reference Laboratory of Antimicrobial Resistances, Department of Infectious Diseases, National Institute of Health Dr Ricardo Jorge, Av. Padre Cruz, 1649-016 Lisbon, Portugal
| | - Ana Martins
- Faculty of Veterinary Medicine, CIISA, TULisbon, Av. da Universidade Técnica, Pólo Universitário, Alto da Ajuda, 1300-477 Lisbon, Portugal
| | - Maria J Fraqueza
- Faculty of Veterinary Medicine, CIISA, TULisbon, Av. da Universidade Técnica, Pólo Universitário, Alto da Ajuda, 1300-477 Lisbon, Portugal
| | - Manuela Caniça
- National Reference Laboratory of Antimicrobial Resistances, Department of Infectious Diseases, National Institute of Health Dr Ricardo Jorge, Av. Padre Cruz, 1649-016 Lisbon, Portugal
| | - Fernanda C Domingues
- CICS-UBI-Health Sciences Research Centre, University of Beira Interior, Avenida Infante D. Henrique, 6200-506 Covilhã, Portugal.
| | - Mónica Oleastro
- National Reference Laboratory for Gastrointestinal Infections, Department of Infectious Diseases, National Institute of Health Dr Ricardo Jorge, Av. Padre Cruz, 1649-016 Lisbon, Portugal
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15
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Fusco V, Quero GM. Culture-Dependent and Culture-Independent Nucleic-Acid-Based Methods Used in the Microbial Safety Assessment of Milk and Dairy Products. Compr Rev Food Sci Food Saf 2014; 13:493-537. [DOI: 10.1111/1541-4337.12074] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Accepted: 03/08/2014] [Indexed: 12/12/2022]
Affiliation(s)
- Vincenzina Fusco
- Nal. Research Council of Italy; Inst. of Sciences of Food Production (CNR-ISPA); Bari Italy
| | - Grazia Marina Quero
- Nal. Research Council of Italy; Inst. of Sciences of Food Production (CNR-ISPA); Bari Italy
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16
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Benejat L, Gravet A, Sifré E, Ben Amor S, Quintard B, Mégraud F, Lehours P. Characterization of a Campylobacter fetus-
like strain isolated from the faeces of a sick leopard tortoise (Stigmochelys pardalis
) using matrix-assisted laser desorption/ionization time of flight as an alternative to bacterial 16S rDNA phylogeny. Lett Appl Microbiol 2013; 58:338-43. [DOI: 10.1111/lam.12194] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Revised: 11/13/2013] [Accepted: 11/14/2013] [Indexed: 11/29/2022]
Affiliation(s)
- L. Benejat
- Bacteriology Laboratory; University of Bordeaux; Bordeaux France
- INSERM; U853; Bordeaux France
| | - A. Gravet
- Hôpital Emile Muller; Laboratoire de Microbiologie; Mulhouse France
| | - E. Sifré
- Bacteriology Laboratory; University of Bordeaux; Bordeaux France
- INSERM; U853; Bordeaux France
| | - S. Ben Amor
- Bacteriology Laboratory; University of Bordeaux; Bordeaux France
- INSERM; U853; Bordeaux France
| | - B. Quintard
- Parc zoologique et botanique de Mulhouse; Mulhouse France
| | - F. Mégraud
- Bacteriology Laboratory; University of Bordeaux; Bordeaux France
- INSERM; U853; Bordeaux France
| | - P. Lehours
- Bacteriology Laboratory; University of Bordeaux; Bordeaux France
- INSERM; U853; Bordeaux France
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17
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Ferreira S, Júlio C, Queiroz JA, Domingues FC, Oleastro M. Molecular diagnosis of Arcobacter and Campylobacter in diarrhoeal samples among Portuguese patients. Diagn Microbiol Infect Dis 2013; 78:220-5. [PMID: 24361090 DOI: 10.1016/j.diagmicrobio.2013.11.021] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2013] [Revised: 11/14/2013] [Accepted: 11/16/2013] [Indexed: 11/16/2022]
Abstract
The present study was conducted to investigate the prevalence and diversity of Arcobacter and Campylobacter spp. in 298 stool samples of patients with diarrhoea, collected from 22 Portuguese hospitals, between September and November 2012. Detection of Arcobacter and Campylobacter spp. was performed using molecular-based detection techniques, such as real-time fluorescence resonance energy transfer PCR, species-specific PCR, and sequencing of amplified PCR products. Overall, 1.3% of the samples were positive for Arcobacter butzleri and 0.3% for Arcobacter cryaerophilus. Campylobacter spp. were found in 31.9% of diarrhoeic faeces. Campylobacter jejuni and Campylobacter concisus were the most prevalent species (13.7% and 8.0%, respectively). The prevalence of Arcobacter and Campylobacter spp. was significantly different between children and adults (39.7% versus 22.8%, P = 0.003). We underline the high prevalence of these pathogens in diarrhoeal samples among Portuguese patients, with particular relevance in the paediatric age group.
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Affiliation(s)
- Susana Ferreira
- CICS-UBI-Health Sciences Research Centre, Faculty of Health Sciences, University of Beira Interior, Avenida Infante D. Henrique, 6200-506 Covilhã, Portugal
| | - Cláudia Júlio
- National Institute of Health Dr. Ricardo Jorge, Department of Infectious Diseases, National Reference Laboratory for Gastrointestinal Infections, Av. Padre Cruz, Lisbon, Portugal
| | - João A Queiroz
- CICS-UBI-Health Sciences Research Centre, Faculty of Health Sciences, University of Beira Interior, Avenida Infante D. Henrique, 6200-506 Covilhã, Portugal
| | - Fernanda C Domingues
- CICS-UBI-Health Sciences Research Centre, Faculty of Health Sciences, University of Beira Interior, Avenida Infante D. Henrique, 6200-506 Covilhã, Portugal.
| | - Mónica Oleastro
- National Institute of Health Dr. Ricardo Jorge, Department of Infectious Diseases, National Reference Laboratory for Gastrointestinal Infections, Av. Padre Cruz, Lisbon, Portugal
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18
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Comparison of characteristics of patients infected by Campylobacter jejuni, Campylobacter coli, and Campylobacter fetus. J Clin Microbiol 2013; 52:328-30. [PMID: 24197884 DOI: 10.1128/jcm.03029-13] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
A large database of Campylobacter isolates precisely identified at the species level was used to compare patients' characteristics. In a multivariate analysis, Campylobacter coli was found more often in older patients and in patients having traveled abroad and less often in summertime than Campylobacter jejuni. Campylobacter fetus infection occurred in much older patients and in hospitalized patients with a systemic disease.
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19
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Prendki V, Marmor S, Zeller V, Lhotellier L, Mégraud F, Desplaces N. Campylobacter infection after prosthetic joint surgery. ACTA ACUST UNITED AC 2013; 45:706-10. [PMID: 23808718 DOI: 10.3109/00365548.2013.800225] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Few cases of Campylobacter prosthetic joint infection (PJI) have been reported so far. We describe the demographic characteristics, underlying conditions, clinical features, treatment, and outcome of 8 patients with Campylobacter PJI in our hospital. All strains were confirmed at the French National Reference Center for Campylobacter and Helicobacter. Seven patients were infected with C. fetus and 1 with C. jejuni. Most patients were elderly and immunocompromised. Four had bacteremia, one of these with a pacemaker endocarditis. All the patients received at least 3 months of antibiotic treatment and 6 were treated surgically. The outcome was favorable at 2 years of follow-up in all except for 1 patient. Campylobacter PJI cases are rare but likely to become more frequent. C. fetus bacteremia should motivate physicians to look for a secondary localization such as a Campylobacter PJI.
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Affiliation(s)
- Virginie Prendki
- Service d'Orthopédie, Groupe Hospitalier Diaconesses Croix Saint Simon, Paris, France.
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20
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Microbiological diagnosis of severe diarrhea in kidney transplant recipients by use of multiplex PCR assays. J Clin Microbiol 2013; 51:1841-9. [PMID: 23554205 DOI: 10.1128/jcm.03366-12] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Diarrhea is a frequent complication after kidney transplantation, ascribed to adverse effects of the immunosuppressive therapy in case of negative microbiological examination of the stools. The aim of this study was to improve the microbiological diagnosis by implementing molecular tests. Fifty-four severe diarrhea events that occurred in 49 adult kidney transplant recipients from September 2010 to November 2011 were investigated. One or several enteric pathogens were detected in 13 (23%) stool samples using classical microbiological methods versus 39 (72%) for the seven commercially available multiplex PCR assays used retrospectively (P = 0.006). Interestingly, molecular diagnosis identified 15 multiple infections compared to none using classical techniques. The primary pathogens detected were enteropathogenic Escherichia coli (EPEC) (n = 15; 38%), Campylobacter spp. (n = 15; 38%), and Norovirus (n = 14; 36%). Specificities for Campylobacter and Norovirus infection diagnosis were 75 and 100%, respectively, by comparison to reference methods. Based on molecular findings, a cyclosporine-mycophenolate mofetil combination was identified as a risk factor for developing Norovirus-induced diarrhea. Norovirus infections were also responsible for higher weight loss than all the other causes of diarrhea. In samples from asymptomatic immunocompromised and immunocompetent patients, EPEC but not Norovirus and Campylobacter infections were detected at a frequency similar to that observed in symptomatic kidney transplant recipients. In conclusion, molecular tools significantly improved the detection of single and multiple enteric infections by comparison to classical techniques and could quickly become the key element in the management of severe acute diarrhea in transplant recipients.
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21
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On S, Brandt S, Cornelius A, Fusco V, Quero G, Maćkiw E, Houf K, Bilbao A, Díaz A, Benejat L, Megraud F, Collins-Emerson J, French N, Gotcheva V, Angelov A, Alakomi HL, Saarela M, Paulin S. PCR revisited: a case for revalidation of PCR assays for microorganisms using identification ofCampylobacterspecies as an exemplar. QUALITY ASSURANCE AND SAFETY OF CROPS & FOODS 2013. [DOI: 10.3920/qas2012.0158] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- S.L.W. On
- Christchurch Science Centre, Institute of Environmental Science and Research (ESR), Food Programme, 27 Creyke Road, Ilam, 8041, Christchurch, New Zealand
| | - S.M. Brandt
- Christchurch Science Centre, Institute of Environmental Science and Research (ESR), Food Programme, 27 Creyke Road, Ilam, 8041, Christchurch, New Zealand
| | - A.J. Cornelius
- Christchurch Science Centre, Institute of Environmental Science and Research (ESR), Food Programme, 27 Creyke Road, Ilam, 8041, Christchurch, New Zealand
| | - V. Fusco
- National Research Council of Italy, Institute of Sciences and Food Protection (CNR-ISPA), Via Amendola 122/o, 70126 Bari, Italy
| | - G.M. Quero
- National Research Council of Italy, Institute of Sciences and Food Protection (CNR-ISPA), Via Amendola 122/o, 70126 Bari, Italy
| | - E. Maćkiw
- National Food and Nutrition Institute (NFNI), Powsińska 61/63, 02-093 Warsaw, Poland
- Department of Food and Consumer Articles Research, National Institute of Public Health - National Institute of Hygiene, ul. Chocimska 24, 00-791 Warszawa, Poland
| | - K. Houf
- Department of Veterinary Public Health and Food Safety, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
| | - A. Bilbao
- Gaiker-IK 4 Zentru Teknologikoa, Teknologi Parkea, 202 Eraikina, 48170 Zamudio, Bizkaia, Spain
| | - A.I. Díaz
- Gaiker-IK 4 Zentru Teknologikoa, Teknologi Parkea, 202 Eraikina, 48170 Zamudio, Bizkaia, Spain
| | - L. Benejat
- Laboratoire de Bacteriologie (INSERM U853), Campylobacter National Reference Centre, University Bordeaux Segalen, 146 Rue Leo Saigent, 33076 Bordeaux, France
| | - F. Megraud
- Laboratoire de Bacteriologie (INSERM U853), Campylobacter National Reference Centre, University Bordeaux Segalen, 146 Rue Leo Saigent, 33076 Bordeaux, France
| | - J. Collins-Emerson
- mEpiLab, Hopkirk Research Institute, Massey University, IVABS, Tennent Drive, 4442 Massey, New Zealand
| | - N.P. French
- mEpiLab, Hopkirk Research Institute, Massey University, IVABS, Tennent Drive, 4442 Massey, New Zealand
| | - V. Gotcheva
- Department of Biotechnology, University of Food Technologies, 26 Maritza Blvd, 4002 Plovdiv, Bulgaria
| | - A. Angelov
- Department of Biotechnology, University of Food Technologies, 26 Maritza Blvd, 4002 Plovdiv, Bulgaria
| | - H.-L. Alakomi
- VTT, Technical Research Centre of Finland, Tietotiez, 02044 Espoo, Finland
| | - M. Saarela
- VTT, Technical Research Centre of Finland, Tietotiez, 02044 Espoo, Finland
| | - S.M. Paulin
- Christchurch Science Centre, Institute of Environmental Science and Research (ESR), Food Programme, 27 Creyke Road, Ilam, 8041, Christchurch, New Zealand
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22
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Floch P, Goret J, Bessède E, Lehours P, Mégraud F. Evaluation of the positive predictive value of a rapid Immunochromatographic test to detect Campylobacter in stools. Gut Pathog 2012. [PMID: 23206554 PMCID: PMC3538574 DOI: 10.1186/1757-4749-4-17] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
The recently developed rapid immunochromatographic tests (ICT) have the potential to provide a quick and easy diagnosis of Campylobacter enteritis in comparison to culture. In a previous study we found them sensitive but lacking in specificity. The aim of the present study was to focus on the problem of specificity and determine the positive predictive value (PPV) of a positive result of the ImmunoCard Stat! Campy (Meridian Bioscience, Cincinnati, OH, USA). For this purpose, the stools positive by ICT were cultured according to 3 different protocols: Karmali agar, Preston enrichment broth subcultured on Karmali agar, and a filtration method on a blood agar without antibiotics, all incubated for 7 days at 37°C. Out of 609 stools from adults and children with community acquired enteritis, the reference methods detected 25 positive cases (4.1%) (culture: 19, specific PCR and ELISA both positive: 6) and the ICT: 31 including the 25 true positives. The PPV was 80.6%. We conclude that ICT is a good method to screen Campylobacter positive stools but because of its lack of specificity the positive stools must be tested by another method.
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Affiliation(s)
- Pauline Floch
- Université de Bordeaux, French National Reference Center for Campylobacters, 33076, Bordeaux, France.
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23
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Lehours P, Aladjidi N, Sarlangue J, Mégraud F. [Campylobacter infections in children]. Arch Pediatr 2012; 19:629-34. [PMID: 22559950 DOI: 10.1016/j.arcped.2012.03.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2011] [Revised: 02/03/2012] [Accepted: 03/23/2012] [Indexed: 11/19/2022]
Abstract
Campylobacter infections are essentially enteric infections frequently occurring before 15 years of age. The main species responsible for these infections is Campylobacter jejuni. The infection is observed mainly during summertime, and boys are more often affected than girls. The transmission is usually food-borne (poultry or cross-contamination of raw food). Environmental contamination is also possible. In addition to the digestive symptoms, systemic infectious complications or postinfectious complications (joints, neurological) can occur. The infection is more severe in immunosuppressed patients. Conventional diagnosis by culture is now challenged by molecular and immunoenzymatic methods, which have greater sensitivity. An adapted antimicrobial treatment improves the digestive symptoms. A dual antibiotic therapy is necessary in case of systemic infection or secondary localization of the infection.
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Affiliation(s)
- P Lehours
- Laboratoire de bactériologie, hôpital Pellegrin, place Amélie-Raba-Léon, 33076 Bordeaux, France; Inserm U853, centre national de référence des Campylobacters et Helicobacters, université de Bordeaux, 33076 Bordeaux, France
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24
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Holmes-Smith AS, McDowell GR, Toury M, McLoskey D, Hungerford G. The Influence of Silver Nanostructures Formed in situ in Silica Sol-Gel Derived Films on the Rate of Förster Resonance Energy Transfer. Chemphyschem 2011; 13:535-41. [DOI: 10.1002/cphc.201100734] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2011] [Revised: 11/25/2011] [Indexed: 11/08/2022]
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Development of a rapid and sensitive method combining a cellulose ester microfilter and a real-time quantitative PCR assay to detect Campylobacter jejuni and Campylobacter coli in 20 liters of drinking water or low-turbidity waters. Appl Environ Microbiol 2011; 78:839-45. [PMID: 22138985 DOI: 10.1128/aem.06754-11] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Investigations of Campylobacter jejuni and Campylobacter coli in samples of drinking water suspected of being at the origin of an outbreak very often lead to negative results. One of the reasons for this failure is the small volume of water typically used for detecting these pathogens (10 to 1,000 ml). The efficiencies of three microfilters and different elution procedures were determined using real-time quantitative PCR to propose a procedure allowing detection of Campylobacter in 20 liters of drinking water or low-turbidity water samples. The results showed that more than 80% of the bacteria inoculated in 1 liter of drinking water were retained on each microfilter. An elution with a solution containing 3% beef extract, 0.05 M glycine at pH 9, combined with direct extraction of the bacterial genomes retained on the cellulose ester microfilter, allowed recovery of 87.3% (±22% [standard deviation]) of Campylobacter per 1 liter of tap water. Recoveries obtained from 20-liter volumes of tap water spiked with a C. coli strain were 69.5% (±10.3%) and 78.5% (±15.1%) for 91 CFU and 36 CFU, respectively. Finally, tests performed on eight samples of 20 liters of groundwater collected from an alluvial well used for the production of drinking water revealed the presence of C. jejuni and C. coli genomes, whereas no bacteria were detected with the normative culture method in volumes ranging from 10 to 1,000 ml. In the absence of available epidemiological data and information on bacterial viability, these last results indicate only that the water resource is not protected from contamination by Campylobacter.
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Tantrawatpan C, Intapan PM, Thanchomnang T, Lulitanond V, Boonmars T, Wu Z, Morakote N, Maleewong W. Differential detection of Trichinella papuae, T. spiralis and T. pseudospiralis by real-time fluorescence resonance energy transfer PCR and melting curve analysis. Vet Parasitol 2011; 185:210-5. [PMID: 22037059 DOI: 10.1016/j.vetpar.2011.09.043] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2011] [Revised: 09/26/2011] [Accepted: 09/30/2011] [Indexed: 11/17/2022]
Abstract
Trichinellosis caused by nematodes of Trichinella spp. is a zoonotic foodborne disease. Three Trichinella species of the parasite including Trichinella spiralis, Trichinella papuae and Trichinella pseudospiralis, have been etiologic agents of human trichinellosis in Thailand. Definite diagnosis of this helminthiasis is based on a finding of the Trichinella larva (e) in a muscle biopsy. The parasite species or genotype can be determined using molecular methods, e.g., polymerase chain reaction (PCR). This study has utilized real-time fluorescence resonance energy transfer PCR (real-time FRET PCR) and a melting curve analysis for the differential diagnosis of trichinellosis. Three common Trichinella species in Thailand were studied using one set of primers and fluorophore-labeled hybridization probes specific for the small subunit of the mitochondrial ribosomal RNA gene. Using fewer than 35 cycles as the cut-off for positivity and using different melting temperatures (T(m)), this assay detected T. spiralis, T. papuae and T. pseudospiralis in muscle tissue and found the mean T(m) ± SD values to be 51.79 ± 0.06, 66.09 ± 0.46 and 51.46 ± 0.09, respectively. The analytical sensitivity of the technique enabled the detection of a single Trichinella larva of each species, and the detection limit for the target DNA sequence was 16 copies of positive control plasmid. A test of the technique's analytical specificity showed no fluorescence signal for a panel of 19 non-Trichinella parasites or for human and mouse genomic DNA. Due to the sensitivity and specificity of the detection of these Trichinella species, as well as the fast and high-throughput nature of these tools, this method has application potential in differentiating non-encapsulated larvae of T. papuae from T. spiralis and T. pseudospiralis in tissues of infected humans and animals.
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Affiliation(s)
- Chairat Tantrawatpan
- Research and Diagnostic Center for Emerging Infectious Diseases, Khon Kaen University, Khon Kaen 40002, Thailand
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Bessède E, Solecki O, Sifré E, Labadi L, Mégraud F. Identification of Campylobacter species and related organisms by matrix assisted laser desorption ionization-time of flight (MALDI-TOF) mass spectrometry. Clin Microbiol Infect 2011; 17:1735-9. [PMID: 21375659 DOI: 10.1111/j.1469-0691.2011.03468.x] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The identification of Campylobacter species and related organisms at the species level has always been difficult using phenotypic methods because of their low metabolic activity, whereas molecular methods are more reliable but time-consuming. In this study, 1007 different strains were identified using three different methods: conventional methods, molecular biology (real-time PCR and sequencing) and matrix assisted laser desorption ionization-time of flight (MALDI-TOF) mass spectrometry. Molecular methods were considered the gold standard. The accuracy of MALDI-TOF mass spectrometry reached 100% compared with the gold standard for all of the Campylobacter species, except Campylobacter jejuni (99.4%). The accuracy of conventional methods compared with the gold standard ranged from 0% to 100% depending on the species. However, MALDI-TOF mass spectrometry was not able to identify a mixture of two different species present in the same sample in four instances. Finally, MALDI-TOF mass spectrometry is highly recommended to identify Campylobacter spp. as only 0.4% discrepancy was found, whereas conventional methods led to 4.5% discrepancy.
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Affiliation(s)
- E Bessède
- Université Victor Segalen Bordeaux 2, Centre National de Référence des Campylobacters et Hélicobacters, Bordeaux Cedex, France
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28
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New methods for detection of campylobacters in stool samples in comparison to culture. J Clin Microbiol 2011; 49:941-4. [PMID: 21209172 DOI: 10.1128/jcm.01489-10] [Citation(s) in RCA: 96] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Campylobacter species, especially Campylobacter jejuni and Campylobacter coli, are a major cause of human bacterial enteritis. Current detection in stools is done essentially by culture on selective and nonselective media with filtration. These methods were compared to 2 molecular biology methods, an in-house real-time PCR and a multiplex PCR named Seeplex Diarrhea ACE Detection, and 3 immunoenzymatic methods, Premier Campy, RidaScreen Campylobacter, and ImmunoCard Stat!Campy. Out of 242 stool specimens tested, 23 (9.5%) fulfilled the positivity criteria, i.e., they were positive by one or both culture methods or, in case of a negative culture, by a positive molecular method and a positive immunoenzymatic method. The striking feature of this study is the low sensitivity of culture, in the range of 60%, in contrast to immunoenzymatic and molecular tests.
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29
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Curved and spiral bacilli. Infect Dis (Lond) 2010. [DOI: 10.1016/b978-0-323-04579-7.00171-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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30
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DEBRETSION ARADOM, HABTEMARIAM TSEGAYE, WILSON SAUL, TAMERU BERHANU, WESLEY IRENEV, YEHUALAESHET TESHOME. COMPARATIVE ASSESSMENT OF STANDARD CULTURE AND REAL-TIME POLYMERASE CHAIN REACTION TO DETECTCAMPYLOBACTER JEJUNIIN RETAIL CHICKEN SAMPLES. J Food Saf 2009. [DOI: 10.1111/j.1745-4565.2009.00179.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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31
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Pentimalli D, Pegels N, García T, Martín R, González I. Specific PCR detection of Arcobacter butzleri, Arcobacter cryaerophilus, Arcobacter skirrowii, and Arcobacter cibarius in chicken meat. J Food Prot 2009; 72:1491-5. [PMID: 19681276 DOI: 10.4315/0362-028x-72.7.1491] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
An enrichment PCR assay using species-specific primers was developed for the detection of Arcobacter butzleri, Arcobacter cryaerophilus, Arcobacter skirrowii, and Arcobacter cibarius in chicken meat. Primers for A. cryaerophilus, A. skirrowii, and A. cibarius were designed based on the gyrA gene to amplify nucleic acid fragments of 212, 257, and 145 bp, respectively. The A. butzleri-specific primers were designed flanking a 203-bp DNA fragment in the 16S rRNA gene. The specificity of the four primer pairs was assessed by PCR analysis of DNA from a panel of Arcobacter species, related Campylobacter, Helicobacter species, and other food bacteria. The applicability of the method was then validated by testing 42 fresh retail-purchased chicken samples in the PCR assay. An 18-h selective preenrichment step followed by PCR amplification with the four Arcobacter primer sets revealed the presence of Arcobacter spp. in 85.7% of the retail chicken samples analyzed. A. butzleri was the only species present in 50% of the samples, and 35.7% of the samples were positive for both A. butzleri and A. cryaerophilus. A. skirrowii and A. cibarius were not detected in any of the chicken samples analyzed. The enrichment PCR assay developed is a specific and rapid alternative for the survey of Arcobacter contamination in meat.
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Affiliation(s)
- Daniela Pentimalli
- Dipartimento di Sanità Pubblica, Facoltà di Agraria, Università degli studi di Parma, Parma, Italy
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32
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Denis M, Chidaine B, Laisney MJ, Kempf I, Rivoal K, Mégraud F, Fravalo P. Comparison of genetic profiles of Campylobacter strains isolated from poultry, pig and Campylobacter human infections in Brittany, France. ACTA ACUST UNITED AC 2009; 57:23-9. [PMID: 18534783 DOI: 10.1016/j.patbio.2008.04.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2008] [Accepted: 04/11/2008] [Indexed: 10/22/2022]
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33
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Detection of resistance to macrolides in thermotolerant campylobacter species by fluorescence in situ hybridization. J Clin Microbiol 2008; 46:3842-4. [PMID: 18753354 DOI: 10.1128/jcm.01155-08] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The resistance of enteritis-causing Campylobacter strains to erythromycin is an emerging problem. We therefore evaluated fluorescence in situ hybridization (FISH) for the rapid detection of resistance using 74 campylobacter isolates. FISH showed specificity and sensitivity of 100% for the detection of high-level resistance.
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34
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Real-time fluorescence resonance energy transfer PCR with melting curve analysis for the detection of Opisthorchis viverrini in fish intermediate hosts. Vet Parasitol 2008; 157:65-71. [PMID: 18760538 DOI: 10.1016/j.vetpar.2008.07.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2008] [Revised: 06/30/2008] [Accepted: 07/15/2008] [Indexed: 11/23/2022]
Abstract
A real-time fluorescence resonance energy transfer (FRET) PCR combined with a melting curve analysis was developed for the detection of Opisthorchis viverrini in its fish intermediate host, cyprinoid fishes. Real-time FRET PCR is based on a fluorescence melting curve analysis of a hybrid between an amplicon generated from a family of repeated DNA elements, the pOV-A6 specific probe sequence (Genbank Accession No. S80278), a 162 bp repeated sequence specific to O. viverrini, and specific fluorophore-labeled probes. The real-time FRET PCR could detect as little as a single metacercaria artificially inoculated in 30 fish samples. The O. viverrini infected fishes were distinguished from non-infected fishes and from the genomic DNA of other parasites by their melting temperature. Sensitivity and specificity of this method were both 100% in the laboratory setting and it outperformed the microscopic method on field-collected samples as well. Melting curve analysis is a rapid, accurate, and sensitive alternative for the specific detection of O. viverrini infected fishes. It allows a high throughput and can be performed on small samples. The assay has not only great potential for epidemiological surveys of fish intermediate hosts but it could also be adapted as screening tool for a range of foodborne parasites in freshwater fishes.
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35
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Intapan PM, Thanchomnang T, Lulitanond V, Pongsaskulchoti P, Maleewong W. Detection of Opisthorchis viverrini in infected bithynid snails by real-time fluorescence resonance energy transfer PCR-based method and melting curve analysis. Parasitol Res 2008; 103:649-55. [PMID: 18512076 DOI: 10.1007/s00436-008-1026-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2008] [Accepted: 04/30/2008] [Indexed: 10/22/2022]
Abstract
A real-time fluorescence resonance energy transfer (FRET) PCR combined with melting curve analysis was developed for the detection of Opisthorchis viverrini in experimentally infected bithynid snails, its first intermediate hosts. The test is based on the fluorescence melting curve analysis of a hybrid between an amplicon from the pOV-A6-specific probe sequence, a 162-bp repeated sequence specific to O. viverrini and specific fluorophore-labeled probes. The real-time FRET PCR could detect as little as a single cercaria artificially introduced in a pool of 30 non-infected snails. The O. viverrini-infected snails were discriminated from non-infected snails and from genomic DNA of other parasite DNAs by their melting temperatures. Sensitivity and specificity of this method were both 100%. Melting curve analysis is a sensitive alternative for the specific detection of O. viverrini-infected snails; it is rapid, allows a high throughput, and can be done on small samples. The assay not only has a high potential for epidemiological surveys of O. viverrini-infected bithynid snails, but also for the detection of cercariae infestations of natural waterways when monitoring transmission sites.
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Affiliation(s)
- Pewpan M Intapan
- Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand.
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36
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Samosornsuk W, Asakura M, Yoshida E, Taguchi T, Nishimura K, Eampokalap B, Phongsisay V, Chaicumpa W, Yamasaki S. Evaluation of a cytolethal distending toxin (cdt) gene-based species-specific multiplex PCR assay for the identification of Campylobacter strains isolated from poultry in Thailand. Microbiol Immunol 2008; 51:909-17. [PMID: 17895609 DOI: 10.1111/j.1348-0421.2007.tb03974.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We have recently developed a cytolethal distending toxin (cdt) gene-based species-specific multiplex PCR assay for identifying Campylobacter jejuni, C. coli and C. fetus. In the present study, the applicability of this assay was evaluated with 34 Campylobacter-like organisms isolated from poultry in Thailand for species identification and was compared with other assays including API Campy, 16S rRNA gene sequence, and hippuricase (hipO) gene detection. Of the 34 strains analyzed, 20, 10 and 1 were identified as C. jejuni, C. coli, and Arcobacter cryaerophilus, respectively, and 3 could not be identified by API Campy. However, 16S rRNA gene analysis, showed that all 34 strains are C. jejuni/coli. To discriminate between these 2 species, the hipO gene, which is specifically present in C. jejuni, was examined by PCR and was detected in 20 strains, which were identified as C. jejuni by API Campy but not in the remaining 14 strains. Collective results indicated that 20 strains were C. jejuni whereas the 14 strains were C. coli. When the cdt gene-based multiplex PCR was employed, however, 19, 20 and 19 strains were identified as C. jejuni while 13, 14 and 13 were identified as C. coli by the cdtA, cdtB and cdtC gene-based multiplex PCR, respectively. Pulsed-field gel electrophoresis revealed that C. jejuni and C. coli strains analyzed are genetically diverse. Taken together, these data suggest that the cdt gene-based multiplex PCR, particularly cdtB gene-based multiplex PCR, is a simple, rapid and reliable method for identifying the species of Campylobacter strains.
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Affiliation(s)
- Worada Samosornsuk
- Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai, Osaka, Japan
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37
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Asakura M, Samosornsuk W, Hinenoya A, Misawa N, Nishimura K, Matsuhisa A, Yamasaki S. Development of a cytolethal distending toxin (cdt) gene-based species-specific multiplex PCR assay for the detection and identification of Campylobacter jejuni, Campylobacter coli and Campylobacter fetus. ACTA ACUST UNITED AC 2008; 52:260-6. [PMID: 18248435 DOI: 10.1111/j.1574-695x.2007.00369.x] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A cytolethal distending toxin (cdt) gene-based species-specific multiplex PCR assay for the detection of cdtA, cdtB or cdtC gene of Campylobacter jejuni, Campylobacter coli or Campylobacter fetus, respectively, was developed and evaluated with 76 Campylobacter strains belonging to seven different species and 131 other bacterial strains of eight different genera. The cdtA, cdtB or cdtC gene of C. jejuni, C. coli or C. fetus, respectively, could be successfully amplified using the corresponding set of primers in a highly species-specific manner. Furthermore, the specific primer set for the cdtA, cdtB or cdtC gene of a particular species could amplify the desired gene from a mixture of DNA templates of any of two or all three species. The detection limit of C. jejuni, C. coli or C. fetus was 10-100 CFU tube(-1) by the multiplex PCR assay on the basis of the presence of the cdtA, cdtB or cdtC gene. These data indicate that the cdt gene-based multiplex PCR assay may be useful for rapid and accurate detection as well as identification of Campylobacter strains in a species-specific manner.
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Affiliation(s)
- Masahiro Asakura
- Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Osaka, Japan
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38
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Abdelbaqi K, Buissonnière A, Prouzet-Mauleon V, Gresser J, Wesley I, Mégraud F, Ménard A. Development of a real-time fluorescence resonance energy transfer PCR to detect arcobacter species. J Clin Microbiol 2007; 45:3015-21. [PMID: 17652482 PMCID: PMC2045264 DOI: 10.1128/jcm.00256-07] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
A real-time PCR targeting the gyrase A subunit gene outside the quinolone resistance-determining region has been developed to detect Arcobacter species. The species identification was done by probe hybridization and melting curve analysis, using fluorescence resonance energy transfer technology. Discrimination between Arcobacter species was straightforward, as the corresponding melting points showed significant differences with the characteristic melting temperatures of 63.5 degrees C, 58.4 degrees C, 60.6 degrees C, and 51.8 degrees C for the Arcobacter butzleri, Arcobacter cryaerophilus, Arcobacter cibarius, and Arcobacter nitrofigilis type strains, respectively. The specificity of this assay was confirmed with pure cultures of 106 Arcobacter isolates from human clinical and veterinary specimens identified by phenotypic methods and 16S rRNA gene sequencing. The assay was then used to screen 345 clinical stool samples obtained from patients with diarrhea. The assay detected A. butzleri in four of these clinical samples (1.2%). These results were confirmed by a conventional PCR method targeting the 16S rRNA gene with subsequent sequencing of the PCR product. In conclusion, this real-time assay detects and differentiates Arcobacter species in pure culture as well as in the competing microbiota of the stool matrix. The assay is economical since only one biprobe is used and multiple Arcobacter species are identified in a single test.
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Affiliation(s)
- Khalil Abdelbaqi
- Université Victor Segalen Bordeaux 2, Centre National de Référence des Helicobacters et Campylobacters, F33076 Bordeaux, France
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39
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Gallay A, Prouzet-Mauléon V, Kempf I, Lehours P, Labadi L, Camou C, Denis M, de Valk H, Desenclos JC, Mégraud F. Campylobacter antimicrobial drug resistance among humans, broiler chickens, and pigs, France. Emerg Infect Dis 2007; 13:259-66. [PMID: 17479889 PMCID: PMC2725848 DOI: 10.3201/eid1302.060587] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
We describe isolates from human Campylobacter infection in the French population and the isolates' antimicrobial drug resistance patterns since 1986 and compare the trends with those of isolates from broiler chickens and pigs from 1999 to 2004. Among 5,685 human Campylobacter isolates, 76.2% were C. jejuni, 17.2% C. coli, and 5.0% C. fetus. Resistance to nalidixic acid increased from 8.2% in 1990 to 26.3% in 2004 (p<10-3), and resistance to ampicillin was high over time. Nalidixic acid resistance was greater for C. coli (21.3%) than for C. jejuni (14.9%, p<10-3). C. jejuni resistance to ciprofloxacin in broilers decreased from 31.7% in 2002 to 9.0% in 2004 (p = 0.02). The patterns of resistance to quinolones and fluoroquinolones were similar between 1999 and 2004 in human and broiler isolates for C. jejuni. These results suggest a potential benefit of a regulation policy limiting use of antimicrobial drugs in food animals.
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Affiliation(s)
- Anne Gallay
- Département des maladies infectieuses, Institut de Veille Sanitaire, Saint Maurice, France.
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Decousser JW, Prouzet-Mauléon V, Bartizel C, Gin T, Colin JP, Fadel N, Holler C, Pollet J, Megraud F. Fatal relapse of a purulent pleurisy caused by Campylobacter fetus subsp. fetus. J Clin Microbiol 2007; 45:2334-6. [PMID: 17507518 PMCID: PMC1932996 DOI: 10.1128/jcm.02562-06] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Campylobacter fetus is associated with invasive disease, while other Campylobacter species, such as C. coli and C. jejuni, are a common cause of bacterial diarrhea. Bacteremia has been well described, but pleurisy remains very uncommon. We report the recurrent isolation of a C. fetus subsp. fetus strain during two episodes of pleural effusion with a fatal outcome.
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Schabereiter-Gurtner C, Selitsch B, Rotter ML, Hirschl AM, Willinger B. Development of novel real-time PCR assays for detection and differentiation of eleven medically important Aspergillus and Candida species in clinical specimens. J Clin Microbiol 2007; 45:906-14. [PMID: 17251398 PMCID: PMC1829149 DOI: 10.1128/jcm.01344-06] [Citation(s) in RCA: 135] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
In the present study, novel real-time PCR assays targeting the fungal ITS2 region were developed for the detection and differentiation of medically important Aspergillus species (Aspergillus fumigatus, Aspergillus flavus, Aspergillus nidulans, Aspergillus niger, and Aspergillus terreus) and Candida species (Candida albicans, Candida dubliniensis, Candida glabrata, Candida krusei, Candida parapsilosis, and Candida tropicalis) using a LightCycler instrument. The combination of a group-specific and a universal primer with five Aspergillus or six Candida species-specific biprobes in one reaction mixture facilitated rapid screening and species differentiation by the characteristic peak melting temperatures of the biprobes. Both assays can be performed either as single assays or simultaneously in the same LightCycler run. The analytical sensitivity using pure cultures and EDTA-anticoagulated blood, cerebrospinal fluid (CSF), and tissue samples spiked with A. fumigatus and C. albicans cell suspensions was shown to be at least 1 CFU per PCR, corresponding to 5 to 10 CFU/ml blood and 10 CFU/200 microl CSF or 0.02 g tissue. To assess the clinical applicability, 26 respiratory samples, 4 tissue samples from the maxillary sinus, and 1 blood sample were retrospectively tested and real-time PCR results were compared with results from culture, histology, or a galactomannan enzyme-linked immunosorbent assay (ELISA). Twenty samples (64.5%) were both culture positive and positive by real-time PCR. Six samples (19.4%) showed no growth of fungi but were positive by real-time PCR. However, all of the tissue samples were positive by both PCR and histology. The blood sample showed no growth of Aspergillus, but aspergillosis was confirmed by positive galactomannan ELISA, histology, and PCR results. The remaining samples (16.1%) were culture and PCR negative; also, no other signs indicating fungal infection were observed. Our data suggest that the Aspergillus and Candida assays may be appropriate for use in clinical laboratories as simple and rapid screening tests for the most frequently encountered Aspergillus and Candida species and might become an important tool in the early diagnosis of fungal infections in the future.
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Affiliation(s)
- Claudia Schabereiter-Gurtner
- Department of Clinical Microbiology, Institute of Hygiene and Medical Microbiology, Medical University of Vienna, Vienna, Austria.
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42
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Kempf I, Dufour-Gesbert F, Hellard G, Prouzet-Mauléon V, Mégraud F. Broilers do not play a dominant role in the Campylobacter fetus contamination of humans. J Med Microbiol 2006; 55:1277-1278. [PMID: 16914660 DOI: 10.1099/jmm.0.46628-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Campylobacter fetus causes severe infections in humans and can be isolated from various mammals and reptiles. However, although poultry are considered to be the main reservoir of Campylobacter jejuni, little is known about the presence of C. fetus in poultry. Thus, specific pathogen-free chickens were experimentally inoculated with a mixture of either three non-thermotolerant or four thermotolerant human strains of C. fetus. Faecal samples were regularly sampled after inoculation and caeca and intestines were collected 21 or 40 days after inoculation. All samples were analysed for the presence of Campylobacter using culture techniques. No Campylobacter could be re-isolated. This result strongly suggests that broilers do not play an important part in the C. fetus contamination of humans.
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Affiliation(s)
- Isabelle Kempf
- AFSSA (French Agency for Food Safety), Mycoplasmology Bacteriology Unit, BP 53, F-22440 Ploufragan, France
| | - Fabienne Dufour-Gesbert
- AFSSA (French Agency for Food Safety), Mycoplasmology Bacteriology Unit, BP 53, F-22440 Ploufragan, France
| | - Gwenaelle Hellard
- AFSSA (French Agency for Food Safety), Mycoplasmology Bacteriology Unit, BP 53, F-22440 Ploufragan, France
| | - Valérie Prouzet-Mauléon
- Centre National de Référence des Campylobacters et Helicobacters, Laboratoire de Bactériologie, Hôpital Pellegrin, Place Amélie Raba-Léon, 33076 Bordeaux cedex, France
| | - Francis Mégraud
- Centre National de Référence des Campylobacters et Helicobacters, Laboratoire de Bactériologie, Hôpital Pellegrin, Place Amélie Raba-Léon, 33076 Bordeaux cedex, France
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43
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Prouzet-Mauléon V, Labadi L, Bouges N, Ménard A, Mégraud F. Arcobacter butzleri: underestimated enteropathogen. Emerg Infect Dis 2006; 12:307-9. [PMID: 16494760 PMCID: PMC3373082 DOI: 10.3201/eid1202.050570] [Citation(s) in RCA: 111] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Molecular methods applied to 2,855 strains of Campylobacter-like organisms received from a surveillance network of Campylobacter infections in France identified 29 Arcobacter butzleri infections. This species ranks fourth for Campylobacteraceae isolation and appears to have the same pathogenic potential as the other species in the genus.
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