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Vázquez-Chacón CA, Rodríguez-Gaxiola FDJ, López-Carrera CF, Cruz-Rivera M, Martínez-Guarneros A, Parra-Unda R, Arámbula-Meraz E, Fonseca-Coronado S, Vaughan G, López-Durán PA. Identification of drug resistance mutations among Mycobacterium bovis lineages in the Americas. PLoS Negl Trop Dis 2021; 15:e0009145. [PMID: 33591982 PMCID: PMC7886168 DOI: 10.1371/journal.pntd.0009145] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Accepted: 01/14/2021] [Indexed: 01/25/2023] Open
Abstract
Identifying the Mycobacterium tuberculosis resistance mutation patterns is of the utmost importance to assure proper patient's management and devising of control programs aimed to limit spread of disease. Zoonotic Mycobacterium bovis infection still represents a threat to human health, particularly in dairy production regions. Routinary, molecular characterization of M. bovis is performed primarily by spoligotyping and mycobacterial interspersed repetitive units (MIRU) while next generation sequencing (NGS) approaches are often performed by reference laboratories. However, spoligotyping and MIRU methodologies lack the resolution required for the fine characterization of tuberculosis isolates, particularly in outbreak settings. In conjunction with sophisticated bioinformatic algorithms, whole genome sequencing (WGS) analysis is becoming the method of choice for advanced genetic characterization of tuberculosis isolates. WGS provides valuable information on drug resistance and compensatory mutations that other technologies cannot assess. Here, we performed an analysis of the most frequently identified mutations associated with tuberculosis drug resistance and their genetic relationship among 2,074 Mycobacterium bovis WGS recovered primarily from non-human hosts. Full-length gene sequences harboring drug resistant associated mutations and their phylogenetic relationships were analyzed. The results showed that M. bovis isolates harbor mutations conferring resistance to both first- and second-line antibiotics. Mutations conferring resistance for isoniazid, fluoroquinolones, streptomycin, and aminoglycosides were identified among animal strains. Our findings highlight the importance of molecular surveillance to monitor the emergence of mutations associated with multi and extensive drug resistance in livestock and other non-human mammals.
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Affiliation(s)
- Carlos Arturo Vázquez-Chacón
- Facultad de Medicina y Cirugía, Universidad Autónoma Benito Juárez de Oaxaca, Oaxaca, México
- Laboratorio de Micobacterias, Instituto de Diagnóstico y Referencia Epidemiológicos, Ciudad de México, México
| | | | | | - Mayra Cruz-Rivera
- Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Armando Martínez-Guarneros
- Laboratorio de Micobacterias, Instituto de Diagnóstico y Referencia Epidemiológicos, Ciudad de México, México
| | - Ricardo Parra-Unda
- Unidad de Investigaciones en Salud Pública, Facultad de Ciencias Químico Biológicas, Universidad Autónoma de Sinaloa, Culiacán, Sinaloa, México
| | - Eliakym Arámbula-Meraz
- Laboratorio de Genética y Biología Molecular, Facultad de Ciencias Químico Biológicas, Universidad Autónoma de Sinaloa, Culiacán, Sinaloa, México
| | - Salvador Fonseca-Coronado
- Facultad de Estudios Superiores Cuautitlán, Universidad Nacional Autónoma de México, Estado de México, México
| | - Gilberto Vaughan
- Facultad de Ciencias de la Salud, Universidad Anáhuac, Campus Norte, Estado de México, México
| | - Paúl Alexis López-Durán
- Facultad de Estudios Superiores Cuautitlán, Universidad Nacional Autónoma de México, Estado de México, México
- Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Ciudad de México, México
- Facultad de Ciencias de la Salud, Universidad Anáhuac, Campus Norte, Estado de México, México
- * E-mail:
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Whole genome sequencing of Mycobacterium bovis to obtain molecular fingerprints in human and cattle isolates from Baja California, Mexico. Int J Infect Dis 2017; 63:48-56. [PMID: 28739421 DOI: 10.1016/j.ijid.2017.07.012] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 07/04/2017] [Accepted: 07/16/2017] [Indexed: 12/30/2022] Open
Abstract
OBJECTIVES To determine genetic diversity by comparing the whole genome sequences of cattle and human Mycobacterium bovis isolates from Baja California. METHODS A whole genome sequencing strategy was used to obtain the molecular fingerprints of 172 isolates of M. bovis obtained from Baja California, Mexico; 155 isolates were from cattle and 17 isolates were from humans. Spoligotypes were characterized in silico and single nucleotide polymorphism (SNP) differences between the isolates were evaluated. RESULTS A total of 12 M. bovis spoligotype patterns were identified in cattle and humans. Two predominant spoligotypes patterns were seen in both cattle and humans: SB0145 and SB1040. The SB0145 spoligotype represented 59% of cattle isolates (n=91) and 65% of human isolates (n=11), while the SB1040 spoligotype represented 30% of cattle isolates (n=47) and 30% of human isolates (n=5). When evaluating SNP differences, the human isolates were intimately intertwined with the cattle isolates. CONCLUSIONS All isolates from humans had spoligotype patterns that matched those observed in the cattle isolates, and all human isolates shared common ancestors with cattle in Baja California based on SNP analysis. This suggests that most human tuberculosis caused by M. bovis in Baja California is derived from M. bovis circulating in Baja California cattle. These results reinforce the importance of bovine tuberculosis surveillance and control in this region.
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Lan Z, Bastos M, Menzies D. Treatment of human disease due to Mycobacterium bovis: a systematic review. Eur Respir J 2016; 48:1500-1503. [PMID: 27540021 DOI: 10.1183/13993003.00629-2016] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Accepted: 06/23/2016] [Indexed: 11/05/2022]
Affiliation(s)
- Zhiyi Lan
- Respiratory Epidemiology and Clinical Research Unit, Montreal Chest Institute, McGill University, Montreal, QC, Canada
| | - Mayara Bastos
- Dept of Infectious Diseases, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Dick Menzies
- Respiratory Epidemiology and Clinical Research Unit, Montreal Chest Institute, McGill University, Montreal, QC, Canada
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4
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Fanosie A, Gelaw B, Tessema B, Tesfay W, Admasu A, Yitayew G. Mycobacterium tuberculosis Complex and HIV Co-Infection among Extrapulmonary Tuberculosis Suspected Cases at the University of Gondar Hospital, Northwestern Ethiopia. PLoS One 2016; 11:e0150646. [PMID: 26950547 PMCID: PMC4780813 DOI: 10.1371/journal.pone.0150646] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Accepted: 02/16/2016] [Indexed: 11/25/2022] Open
Abstract
Background Extrapulmonary Tuberculosis (EPTB) and Human Immunodeficiency Virus (HIV) infection are interrelated as a result of immune depression. The aim of this study was to determine the prevalence of Mycobacterium tuberculosis complex isolates and the burden of HIV co-infection among EPTB suspected patients. Method An institution based cross-sectional study was conducted among EPTB suspected patients at the University of Gondar Hospital. Socio-demographic characteristics and other clinical data were collected using a pretested questionnaire. GeneXpert MTB/RIF assay was performed to diagnosis Mycobacterium tuberculosis complex and Rifampicin resistance. All samples were also investigated by cytology and culture. The HIV statuses of all patients were screened initially by KHB, and all positive cases were further re-tested by STAT-pack. Data was analyzed using SPSS version 20 computer software and a P-value of < 0.05 was taken as statistically significant. Results A total of 141 extrapulmonary suspected patients were enrolled in this study. The overall prevalence of culture confirmed extrapulmonary tuberculosis infection was 29.8%, but the GeneXpert result showed a 26.2% prevalence of Mycobacterium tuberculosis complex infection. The 78.4% prevalence of extrapulmonary tuberculosis infection was found to be higher among the adult population. The prevalence of HIV infection among EPTB suspected patients was 14.1%, while it was 32.4% among GeneXpert-confirmed extrapulmonary TB cases (12/37). Tuberculosis lymphadenitis was the predominant (78.4%) type of EPTB infection followed by tuberculosis cold abscess (10.7%). Adult hood, previous history of contact with known pulmonary tuberculosis patients, and HIV co-infection showed a statistically significant association with extrapulmonary tuberculosis infection (P<0.013). Conclusion The prevalence of culture confirmed-EPTB infection was high, and a higher EPTB-HIV co-infection was also observed.
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Affiliation(s)
- Alemu Fanosie
- School of Biomedical and Laboratory Sciences, College of Medicine and Health Sciences (CMHS), The University of Gondar (UOG), P.O. box 196, Gondar, Ethiopia
| | - Baye Gelaw
- School of Biomedical and Laboratory Sciences, College of Medicine and Health Sciences (CMHS), The University of Gondar (UOG), P.O. box 196, Gondar, Ethiopia
- * E-mail:
| | - Belay Tessema
- School of Biomedical and Laboratory Sciences, College of Medicine and Health Sciences (CMHS), The University of Gondar (UOG), P.O. box 196, Gondar, Ethiopia
| | - Wogahta Tesfay
- School of Medicine, College of Medicine and Health Sciences (CMHS), The University of Gondar (UOG), P.O. box 196, Gondar, Ethiopia
| | - Aschalew Admasu
- Bahir Dar Regional Health and Research Laboratory Center, Bahir Dar, Ethiopia
| | - Gashaw Yitayew
- Bahir Dar Regional Health and Research Laboratory Center, Bahir Dar, Ethiopia
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5
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Dan JM, Crespo M, Silveira FP, Kaplan R, Aslam S. Mycobacterium bovis hip bursitis in a lung transplant recipient. Transpl Infect Dis 2016; 18:120-4. [PMID: 26671334 DOI: 10.1111/tid.12491] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Revised: 10/07/2015] [Accepted: 11/11/2015] [Indexed: 02/04/2023]
Abstract
We present a report of extrapulmonary Mycobacterium bovis infection in a lung transplant recipient. M. bovis is acquired predominantly by zoonotic transmission, particularly from consumption of unpasteurized foods. We discuss epidemiologic exposure, especially as relates to the Mexico-US border, clinical characteristics, resistance profile, and treatment.
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Affiliation(s)
- J M Dan
- Department of Medicine, Division of Infectious Diseases, University of California San Diego, La Jolla, California, USA
| | - M Crespo
- Department of Medicine, Division of Pulmonary, Allergy, and Critical Care Medicine, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA
| | - F P Silveira
- Department of Medicine, Division of Infectious Diseases, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA
| | - R Kaplan
- Department of Medicine, Division of Rheumatology, Scripps Memorial Hospital Encinitas, Encinitas, California, USA
| | - S Aslam
- Department of Medicine, Division of Infectious Diseases, University of California San Diego, La Jolla, California, USA
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Viegas SO, Ghebremichael S, Massawo L, Alberto M, Fernandes FC, Monteiro E, Couvin D, Matavele JM, Rastogi N, Correia-Neves M, Machado A, Carrilho C, Groenheit R, Källenius G, Koivula T. Mycobacterium tuberculosis causing tuberculous lymphadenitis in Maputo, Mozambique. BMC Microbiol 2015; 15:268. [PMID: 26589993 PMCID: PMC4654834 DOI: 10.1186/s12866-015-0603-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Accepted: 11/12/2015] [Indexed: 01/29/2023] Open
Abstract
Background The zoonosis bovine tuberculosis (TB) is known to be responsible for a considerable proportion of extrapulmonary TB. In Mozambique, bovine TB is a recognised problem in cattle, but little has been done to evaluate how Mycobacterium bovis has contributed to human TB. We here explore the public health risk for bovine TB in Maputo, by characterizing the isolates from tuberculous lymphadenitis (TBLN) cases, a common manifestation of bovine TB in humans, in the Pathology Service of Maputo Central Hospital, in Mozambique, during one year. Results Among 110 patients suspected of having TBLN, 49 had a positive culture result. Of those, 48 (98 %) were positive for Mycobacterium tuberculosis complex and one for nontuberculous mycobacteria. Of the 45 isolates analysed by spoligotyping and Mycobacterial Interspersed Repetitive Unit – Variable Number Tandem Repeat (MIRU-VNTR), all were M. tuberculosis. No M. bovis was found. Cervical TBLN, corresponding to 39 (86.7 %) cases, was the main cause of TBLN and 66.7 % of those where from HIV positive patients. We found that TBLN in Maputo was caused by a variety of M. tuberculosis strains. The most prevalent lineage was the EAI (n = 19; 43.2 %). Particular common spoligotypes were SIT 48 (EAI1_SOM sublineage), SIT 42 (LAM 9), SIT 1 (Beijing) and SIT53 (T1), similar to findings among pulmonary cases. Conclusions M. tuberculosis was the main etiological agent of TBLN in Maputo. M. tuberculosis genotypes were similar to the ones causing pulmonary TB, suggesting that in Maputo, cases of TBLN arise from the same source as pulmonary TB, rather than from an external zoonotic source. Further research is needed on other forms of extrapulmonary TB and in rural areas where there is high prevalence of bovine TB in cattle, to evaluate the risk of transmission of M. bovis from cattle to humans. Electronic supplementary material The online version of this article (doi:10.1186/s12866-015-0603-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Sofia Omar Viegas
- National Institute of Health, Ministry of Health, Maputo, Mozambique. .,Faculty of Veterinary, Eduardo Mondlane University, Maputo, Mozambique. .,Department of Clinical Science and Education, Karolinska Institutet, Stockholm, Sweden.
| | | | - Leguesse Massawo
- National Institute of Health, Ministry of Health, Maputo, Mozambique.
| | - Matos Alberto
- Pathology Service, Maputo Central Hospital, Ministry of Health, Maputo, Mozambique.
| | - Fabíola Couto Fernandes
- Pathology Service, Maputo Central Hospital, Ministry of Health, Maputo, Mozambique. .,Department of Pathology, Faculty of Medicine, Eduardo Mondlane University, Maputo, Mozambique.
| | - Eliane Monteiro
- Pathology Service, Maputo Central Hospital, Ministry of Health, Maputo, Mozambique.
| | - David Couvin
- WHO Supranational TB Reference Laboratory, Tuberculosis & Mycobacteria Unit, Institut Pasteur de la Guadeloupe, Abymes, Guadeloupe, France.
| | | | - Nalin Rastogi
- WHO Supranational TB Reference Laboratory, Tuberculosis & Mycobacteria Unit, Institut Pasteur de la Guadeloupe, Abymes, Guadeloupe, France.
| | - Margarida Correia-Neves
- Department of Clinical Science and Education, Karolinska Institutet, Stockholm, Sweden. .,Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, Braga, Portugal. .,ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, Portugal.
| | - Adelina Machado
- Faculty of Veterinary, Eduardo Mondlane University, Maputo, Mozambique.
| | - Carla Carrilho
- Pathology Service, Maputo Central Hospital, Ministry of Health, Maputo, Mozambique. .,Department of Pathology, Faculty of Medicine, Eduardo Mondlane University, Maputo, Mozambique.
| | - Ramona Groenheit
- Department of Microbiology, Public Health Agency of Sweden, Solna, Sweden.
| | - Gunilla Källenius
- Department of Clinical Science and Education, Karolinska Institutet, Stockholm, Sweden.
| | - Tuija Koivula
- Department of Clinical Science and Education, Karolinska Institutet, Stockholm, Sweden. .,Department of Microbiology, Public Health Agency of Sweden, Solna, Sweden.
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Bobadilla-del Valle M, Torres-González P, Cervera-Hernández ME, Martínez-Gamboa A, Crabtree-Ramirez B, Chávez-Mazari B, Ortiz-Conchi N, Rodríguez-Cruz L, Cervantes-Sánchez A, Gudiño-Enríquez T, Cinta-Severo C, Sifuentes-Osornio J, Ponce de León A. Trends of Mycobacterium bovis Isolation and First-Line Anti-tuberculosis Drug Susceptibility Profile: A Fifteen-Year Laboratory-Based Surveillance. PLoS Negl Trop Dis 2015; 9:e0004124. [PMID: 26421930 PMCID: PMC4589280 DOI: 10.1371/journal.pntd.0004124] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2015] [Accepted: 09/07/2015] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Mycobacterium tuberculosis causes the majority of tuberculosis (TB) cases in humans; however, in developing countries, human TB caused by M. bovis may be frequent but undetected. Human TB caused by M. bovis is considered a zoonosis; transmission is mainly through consumption of unpasteurized dairy products, and it is less frequently attributed to animal-to-human or human-to-human contact. We describe the trends of M. bovis isolation from human samples and first-line drug susceptibility during a 15-year period in a referral laboratory located in a tertiary care hospital in Mexico City. METHODOLOGY/PRINCIPAL FINDINGS Data on mycobacterial isolates from human clinical samples were retrieved from the laboratory's database for the 2000-2014 period. Susceptibility to first-line drugs: rifampin, isoniazid, streptomycin (STR) and ethambutol was determined. We identified 1,165 isolates, 73.7% were M. tuberculosis and 26.2%, M. bovis. Among pulmonary samples, 16.6% were M. bovis. The proportion of M. bovis isolates significantly increased from 7.8% in 2000 to 28.4% in 2014 (X(2)trend, p<0.001). Primary STR resistance was higher among M. bovis compared with M. tuberculosis isolates (10.9% vs.3.4%, p<0.001). Secondary multidrug resistance (MDR) rates were 38.5% and 34.4% for M. bovis and M. tuberculosis, respectively (p = 0.637). A rising trend of primary STR monoresistance was observed for both species (3.4% in 2000-2004 vs. 7.6% in 2010-2014; p = 0.02). CONCLUSIONS/SIGNIFICANCE There is a high prevalence and a rising trend of M. bovis isolates in our region. The proportion of pulmonary M. bovis isolates is higher than in previous reports. Additionally, we report high rates of primary anti-tuberculosis resistance and secondary MDR in both M. tuberculosis and M. bovis. This is one of the largest reports on drug susceptibility of M. bovis from human samples and shows a significant proportion of first-line anti-tuberculosis drug resistance.
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Affiliation(s)
- Miriam Bobadilla-del Valle
- Department of Infectious Diseases, Laboratory of Clinical Microbiology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, México
| | - Pedro Torres-González
- Department of Infectious Diseases, Laboratory of Clinical Microbiology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, México
| | - Miguel Enrique Cervera-Hernández
- Department of Infectious Diseases, Laboratory of Clinical Microbiology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, México
| | - Areli Martínez-Gamboa
- Department of Infectious Diseases, Laboratory of Clinical Microbiology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, México
| | - Brenda Crabtree-Ramirez
- Department of Infectious Diseases, HIV Clinic, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| | - Bárbara Chávez-Mazari
- Department of Infectious Diseases, Laboratory of Clinical Microbiology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, México
| | - Narciso Ortiz-Conchi
- Department of Infectious Diseases, Laboratory of Clinical Microbiology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, México
| | - Luis Rodríguez-Cruz
- Department of Infectious Diseases, Laboratory of Clinical Microbiology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, México
| | - Axel Cervantes-Sánchez
- Department of Infectious Diseases, Laboratory of Clinical Microbiology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, México
| | - Tomasa Gudiño-Enríquez
- Department of Infectious Diseases, Laboratory of Clinical Microbiology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, México
| | - Carmen Cinta-Severo
- Department of Infectious Diseases, Laboratory of Clinical Microbiology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, México
| | - José Sifuentes-Osornio
- Department of Medicine, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
- * E-mail: (JSO); (APdL)
| | - Alfredo Ponce de León
- Department of Infectious Diseases, Laboratory of Clinical Microbiology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, México
- * E-mail: (JSO); (APdL)
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8
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Spositto FLE, Campanerut PAZ, Ghiraldi LD, Leite CQF, Hirata MH, Hirata RDC, Siqueira VLD, Cardoso RF. Multiplex-PCR for differentiation of Mycobacterium bovis from Mycobacterium tuberculosis complex. Braz J Microbiol 2014; 45:841-3. [PMID: 25477916 PMCID: PMC4204967 DOI: 10.1590/s1517-83822014000300012] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2013] [Accepted: 03/14/2014] [Indexed: 11/22/2022] Open
Abstract
We evaluated a multiplex-PCR to differentiate Mycobacterium bovis from M. tuberculosis Complex (MTC) by one step amplification based on simultaneous detection of pncA 169C > G change in M. bovis and the IS6110 present in MTC species. Our findings showed the proposed multiplex-PCR is a very useful tool for complementation in differentiating M. bovis from other cultured MTC species.
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Affiliation(s)
- F L E Spositto
- Programa de Pós Graduação em Biociências e Fisiopatologia Universidade Estadual de Maringá MaringáPR Brazil Programa de Pós Graduação em Biociências e Fisiopatologia, Universidade Estadual de Maringá, Maringá, PR, Brazil
| | - P A Z Campanerut
- Departamento de Análises Clínicas e Biomedicina Universidade Estadual de Maringá PR Brazil Departamento de Análises Clínicas e Biomedicina, Universidade Estadual de Maringá, PR, Brazil
| | - L D Ghiraldi
- Departamento de Análises Clínicas e Biomedicina Universidade Estadual de Maringá PR Brazil Departamento de Análises Clínicas e Biomedicina, Universidade Estadual de Maringá, PR, Brazil
| | - C Q F Leite
- Faculdade de Ciências Farmacêuticas Universidade Estadual Paulista AraraquaraSP Brazil Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista, Araraquara, SP, Brazil
| | - M H Hirata
- Faculdade de Ciências Farmacêuticas Departamento de Análises Clínicas e Toxicológicas Universidade de São Paulo São PauloSP Brazil Faculdade de Ciências Farmacêuticas, Departamento de Análises Clínicas e Toxicológicas, Universidade de São Paulo, São Paulo, SP, Brazil
| | - R D C Hirata
- Faculdade de Ciências Farmacêuticas Departamento de Análises Clínicas e Toxicológicas Universidade de São Paulo São PauloSP Brazil Faculdade de Ciências Farmacêuticas, Departamento de Análises Clínicas e Toxicológicas, Universidade de São Paulo, São Paulo, SP, Brazil
| | - V L D Siqueira
- Departamento de Análises Clínicas e Biomedicina Universidade Estadual de Maringá PR Brazil Departamento de Análises Clínicas e Biomedicina, Universidade Estadual de Maringá, PR, Brazil
| | - R Fressatti Cardoso
- Departamento de Análises Clínicas e Biomedicina Universidade Estadual de Maringá PR Brazil Departamento de Análises Clínicas e Biomedicina, Universidade Estadual de Maringá, PR, Brazil
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9
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McCluskey B, Lombard J, Strunk S, Nelson D, Robbe-Austerman S, Naugle A, Edmondson A. Mycobacterium bovis in California dairies: a case series of 2002-2013 outbreaks. Prev Vet Med 2014; 115:205-16. [PMID: 24856878 DOI: 10.1016/j.prevetmed.2014.04.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2013] [Revised: 03/02/2014] [Accepted: 04/17/2014] [Indexed: 11/28/2022]
Abstract
From 2002 to 2013, bovine tuberculosis (bTB) caused by Mycobacterium bovis (M. bovis) has been detected on numerous dairies in California. In total, twelve herds had bTB detected and are included in the case series which describes these recent outbreaks and discusses potential pathways of introduction. Epidemiological investigations to determine the initial source of bTB in each herd included obtaining data on likely pathways of pathogen introduction. Pathways included purchasing cattle, use of heifer-raising operations, commingling of cattle at greater risk of exposure to infected cattle with cattle destined for California dairies, contact with infected wildlife, exposure to humans with bTB infections, community and neighboring herds and others. Epidemiologic and molecular typing data confirmed the source of infection in 3 herds and probable sources of infection in 2 herds. In the 7 remaining herds described in this case series an epidemiologic link to a source could not be determined and molecular typing results did not associate M. bovis isolates acquired from these herds with another specific U.S. herd or U.S.-born animal. Preventing new introductions of M. bovis onto California dairies will require rigorous epidemiologic investigation of all the potential pathways of introduction discussed here. The root cause(s) of bTB on California dairies is certainly multifactorial with complex interactions of herd management practices, importation of cattle at greater risk of exposure to infected cattle, and the potential of human M. bovis exposure. The extensive use of molecular typing has improved epidemiologists' ability to narrow the scope of potential sources.
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Affiliation(s)
- B McCluskey
- U.S. Department of Agriculture, Animal and Plant Health Inspection Service, Veterinary Services, 2150 Centre Ave, Building B, Fort Collins, CO 80526-8117, United States.
| | - J Lombard
- U.S. Department of Agriculture, Animal and Plant Health Inspection Service, Veterinary Services, Centers for Epidemiology and Animal Health, 2150 Centre Ave, Building B, Fort Collins, CO 80526-8117, United States
| | - S Strunk
- U.S. Department of Agriculture, Animal and Plant Health Inspection Service, Veterinary Services, Centers for Epidemiology and Animal Health, 2150 Centre Ave, Building B, Fort Collins, CO 80526-8117, United States
| | - D Nelson
- U.S. Department of Agriculture, Animal and Plant Health Inspection Service, Veterinary Services, California Area Office, 10365 Old Placerville Rd, Suite 210, Sacramento, CA 95827-2518, United States
| | - S Robbe-Austerman
- U.S. Department of Agriculture, Animal and Plant Health Inspection Service, Veterinary Services, National Veterinary Services Laboratories, 1920 Dayton Ave, Ames, IA 50010, United States
| | - A Naugle
- U.S. Department of Agriculture, Animal and Plant Health Inspection Service, Veterinary Services, National Center for Animal Health Programs, Riverdale, MD 20737, United States
| | - A Edmondson
- California Department of Food and Agriculture, Animal Health and Food Safety Services, Animal Health Branch, 1220N Street, Sacramento, CA 95814, United States
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10
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Pérez-Lago L, Navarro Y, García-de-Viedma D. Current knowledge and pending challenges in zoonosis caused by Mycobacterium bovis: a review. Res Vet Sci 2013; 97 Suppl:S94-S100. [PMID: 24360647 DOI: 10.1016/j.rvsc.2013.11.008] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2013] [Accepted: 11/17/2013] [Indexed: 10/25/2022]
Abstract
Mycobacterium bovis is both the causative agent of bovine tuberculosis (TB) and a zoonotic pathogen. In humans, considerably fewer cases of TB are caused by M. bovis than M. tuberculosis; nevertheless, diagnostic limitations mean that currently available data on prevalence grossly underestimate the true dimension of the problem. The routes of transmission from animals to humans are well known and include direct exposure to infected animals or consumption of contaminated animal products. Application of fingerprinting tools facilitates analysis of the molecular epidemiology of M. bovis in animal-to-human and human-to-human transmission. Apart from cattle and M. bovis, other animal species and members within the M. tuberculosis complex can contribute to the zoonosis. Improvements in diagnostic techniques, application of more advanced discriminatory genotyping tools, and collaboration between veterinary and human health care researchers are key to our understanding of this zoonosis.
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Affiliation(s)
- Laura Pérez-Lago
- Servicio de Microbiología Clínica y Enfermedades Infecciosas, Hospital General Universitario Gregorio Marañón, Spain; Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain; CIBER Enfermedades Respiratorias-CIBERES (CD06/06/0058), Spain
| | - Yurena Navarro
- Servicio de Microbiología Clínica y Enfermedades Infecciosas, Hospital General Universitario Gregorio Marañón, Spain; Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain; CIBER Enfermedades Respiratorias-CIBERES (CD06/06/0058), Spain; CEI Campus Moncloa, UCM-UPM, Madrid, Spain
| | - Darío García-de-Viedma
- Servicio de Microbiología Clínica y Enfermedades Infecciosas, Hospital General Universitario Gregorio Marañón, Spain; Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain; CIBER Enfermedades Respiratorias-CIBERES (CD06/06/0058), Spain; CEI Campus Moncloa, UCM-UPM, Madrid, Spain.
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Molecular analysis of mycobacteria isolated in Mexican patients with different immunodeficiencies in a tertiary care hospital. Arch Med Res 2013; 44:562-9. [PMID: 24054995 DOI: 10.1016/j.arcmed.2013.09.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2013] [Accepted: 08/23/2013] [Indexed: 12/31/2022]
Abstract
BACKGROUND AND AIMS The prevalence of infections with Mycobacterium tuberculosis (MTB) and non-tuberculous mycobacteria (NTM) species in patients with immunodeficiencies in Mexico is unknown. The aim of this study was to identify, at the molecular level, the mycobacterial species most frequently affecting patients with immunodeficiencies and evaluate the genotypic diversity of MTB complex strains. METHODS We conducted a retrospective study of 97 strains in patients with the diagnosis of pulmonary (all isolates were of pathological significance) or extrapulmonary tuberculosis. PCR analysis was performed to determine whether they belonged to the MTB complex (MTC) or the Mycobacterium avium complex (MAC). Noncharacterized NTM were sequenced and, finally, MTC were genotyped by MIRUs-VNTR and spoligotyping. RESULTS Of the 97 mycobacterial strains isolated, 53% were M. tuberculosis, 10% M. bovis, 24% M. avium, 9% M. simiae, 2% M. kansasii and 2% M. gordonae. A great genetic diversity was found by MIRU-VNTR with the greatest polymorphism in MIRU 10, 16, 23 and 27. By spoligotyping, the predominant family was T1. Combining both methods, the association of 13 strains in four different groups was found. CONCLUSIONS This is the first molecular analysis of mycobacteria isolated from patients with immunodeficiencies in Mexico, describing the prevalence of different mycobacterial species in this population. A great genetic diversity of MTB strains was identified. This is also the first report in Mexico describing clinically important isolates of M. simiae.
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Dürr S, Müller B, Alonso S, Hattendorf J, Laisse CJM, van Helden PD, Zinsstag J. Differences in primary sites of infection between zoonotic and human tuberculosis: results from a worldwide systematic review. PLoS Negl Trop Dis 2013; 7:e2399. [PMID: 24009789 PMCID: PMC3757065 DOI: 10.1371/journal.pntd.0002399] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2013] [Accepted: 07/22/2013] [Indexed: 11/18/2022] Open
Abstract
Tuberculosis (TB) is one of the most devastating infectious diseases worldwide. Whilst global burden estimates for M. tuberculosis infection (MtTB) are well established, accurate data on the contribution of zoonotic TB (zTB) caused by M. bovis or M. caprae to human TB are scarce. The association of M. bovis infection with extrapulmonary tuberculosis has been suggested repeatedly, though there is little scientific evidence available to support this relationship. The present study aimed to determine globally the occurrence of extrapulmonary TB and the primary site (i.e. primary body location affected) of zTB in comparison with MtTB, based on previously published reports. A systematic literature review was conducted in 32 different bibliographic databases, selecting reports on zTB written in English, French, German, Spanish or Portuguese. Data from 27 reports from Africa, America, Europe and the Western Pacific Region were extracted for analyses. Low income countries, in Africa and South-East Asia, were highly underrepresented in the dataset. The median proportion of extrapulmonary TB cases was significantly increased among zTB in comparison with data from registries of Europe and USA, reporting mainly MtTB cases (47% versus 22% in Europe, 73% versus 30% in the USA). These findings were confirmed by analyses of eight studies reporting on the proportions of extrapulmonary TB in comparable populations of zTB and MtTB cases (median 63% versus 22%). Also, disparities of primary sites of extrapulmonary TB between zTB and MtTB were detected. Our findings, based on global data, confirm the widely suggested association between zTB and extrapulmonary disease. Different disability weights for zTB and MtTB should be considered and we recommend separate burden estimates for the two diseases.
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Affiliation(s)
- Salome Dürr
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Berne, Berne, Switzerland.
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13
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Müller B, Dürr S, Alonso S, Hattendorf J, Laisse CJM, Parsons SDC, van Helden PD, Zinsstag J. Zoonotic Mycobacterium bovis-induced tuberculosis in humans. Emerg Infect Dis 2013; 19:899-908. [PMID: 23735540 PMCID: PMC4816377 DOI: 10.3201/eid1906.120543] [Citation(s) in RCA: 234] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
We aimed to estimate the global occurrence of zoonotic tuberculosis (TB) caused by Mycobacterium bovis or M. caprae infections in humans by performing a multilingual, systematic review and analysis of relevant scientific literature of the last 2 decades. Although information from many parts of the world was not available, data from 61 countries suggested a low global disease incidence. In regions outside Africa included in this study, overall median proportions of zoonotic TB of ≤1.4% in connection with overall TB incidence rates ≤71/100,000 population/year suggested low incidence rates. For countries of Africa included in the study, we multiplied the observed median proportion of zoonotic TB cases of 2.8% with the continental average overall TB incidence rate of 264/100,000 population/year, which resulted in a crude estimate of 7 zoonotic TB cases/100,000 population/year. These generally low incidence rates notwithstanding, available data indicated substantial consequences of this disease for some population groups and settings.
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Affiliation(s)
- Borna Müller
- Faculty of Health Sciences, Stellenbosch University, Cape Town, South Africa.
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Zenteno-Cuevas R, Montes-Villaseñor E, Morales-Romero J, Coronel-Martín del Campo G, Cuevas B. Co-infection and risk factors of tuberculosis in a Mexican HIV+ population. Rev Soc Bras Med Trop 2012; 44:282-5. [PMID: 21901871 DOI: 10.1590/s0037-86822011005000034] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
INTRODUCTION The situation of tuberculosis (TB) is being modified by the human immunodeficiency virus (HIV), which is increasing the occurrence of new cases and the generation of drug resistant strains, affecting not only the people infected with HIV, but also their close contacts and the general population, conforming a serious public health concern.However, the magnitudes of the factors associated to this co-infection differ considerably in relation to the population groups and geographical areas. METHODS In order to evaluate the prevalence and risk factors for the co-infection of tuberculosis (TB) in a population with human immunodeficiency virus (HIV+) in the Southeast of Mexico, we made the analysis of clinical and epidemiological variables and the diagnosis of tuberculosis by isolation of mycobacteria from respiratory samples. RESULTS From the 147 HIV+ individuals analyzed, 12 were culture positive; this shows a prevalence of 8% for the co-infection. The only variable found with statistical significance for the co-infection was the number of CD4-T < 200 cells/mm3, OR 13(95%, CI 2-106 vs 12-109). CONCLUSIONS To our knowledge this is the first report describing the factors associated with tuberculosis co-infection with HIV in a population from Southern Mexico. The low number of CD4 T-cells was the only variable associated with the TB co-infection and the rest of the variables provide scenarios that require specific and particular interventions for this population group.
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González-Duarte A, Ponce de León A, Osornio JS. Importance of differentiating Mycobaterium bovis in tuberculous meningitis. Neurol Int 2011; 3:e9. [PMID: 22368776 PMCID: PMC3286157 DOI: 10.4081/ni.2011.e9] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2011] [Revised: 07/08/2011] [Accepted: 08/30/2011] [Indexed: 11/23/2022] Open
Abstract
The aim of the article is to describe the principal findings among patients with M.tuberculosis and M. bovis CNS infection. Mycobacterium tuberculosis is one of the most common infectious agents that cause death and neurological sequelae around the world. Most of the complications of CNS TB can be attributed to a delay in the diagnosis. Unfortunately, there are no specific diagnostic tools to support an early diagnosis. Other prognostic factors different from delay in treatment have not been identified. Clinical, radiological and laboratory characteristics were analyzed retrospectively from the medical files of all the patients admitted with the diagnoses of tuberculosis. Of 215 patients admitted with systemic tuberculosis, 64 (30%) had a neurological infection. Positive cultures were found in 54 (84%) cases, 18 (33%) in the CSF and the rest in other fluids or tissues. Adenosin deaminase (ADA) enzyme determination was more sensitive than M. tuberculosis PCR in the CSF for supporting an early diagnosis. In addition to a later clinical stage and treatment lag, positive CSF cultures (P=0.001) and the presence of M. bovis (P=0.020) were prognostic factors for a worse outcome. Neither older age, the presence of tuberculomas versus meningeal enhancement, or HIV co-infection, was associated to a worse prognosis. The isolation of M. bovis subspecies was more common that previously reported, and it was associated to the development of parenchymal lesions (P=0.032) when compared to M. tuberculosis. In this study, positive CSF cultures for M. tuberculosis and further identifying M. bovis species were additional prognostic factors for worse outcome. Positive cultures in systemic fluids other than CSF, even when the patient had no obvious systemic manifestations, and ADA determination in the CSF were noteworthy diagnostic tools for the diagnosis.
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Species distribution of the Mycobacterium tuberculosis complex in clinical isolates from 2007 to 2010 in Turkey: a prospective study. J Clin Microbiol 2011; 49:3837-41. [PMID: 21940474 DOI: 10.1128/jcm.01172-11] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
The Mycobacterium tuberculosis complex (MTBC) consists of a group of closely related species that differ in their epidemiological profiles, host ranges, pathogenicities, geographic distributions, and drug resistances. Identification of members in the MTBC is essential for monitoring the epidemiology of tuberculosis (TB) and implementing appropriate public health control measures. In this study, 188 consecutive MTBC clinical isolates from 2007 to 2010 were evaluated to determine the prevalence of MTBC species in Turkey. PCR and restriction fragment length polymorphism analysis (PCR-RFLP) of the gyrB gene were used, and results for species other than M. tuberculosis were confirmed using the GenoType MTBC assay (Hain Lifescience, Nehren, Germany). Most of the strains were found to be M. tuberculosis (94.1%). The prevalences of M. bovis and M. caprae were 4.3% and 1.6%, respectively. Only one M. bovis BCG strain was identified. Overall, the frequency of bovine tuberculosis in humans was 5.3%. We had assumed that bovine TB infection was under control in animal herds, but primary M. bovis infections in humans caused by transmission from infected animals are still an issue in Turkey. Our results indicate that the frequent identification of M. bovis in routine mycobacteriological laboratory work has further importance due to the well-known resistance of this species to pyrazinamide.
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Reddington K, O'Grady J, Dorai-Raj S, Niemann S, van Soolingen D, Barry T. A novel multiplex real-time PCR for the identification of mycobacteria associated with zoonotic tuberculosis. PLoS One 2011; 6:e23481. [PMID: 21858140 PMCID: PMC3153498 DOI: 10.1371/journal.pone.0023481] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2011] [Accepted: 07/18/2011] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Tuberculosis (TB) is the leading cause of death worldwide from a single infectious agent. An ability to detect the Mycobacterium tuberculosis complex (MTC) in clinical material while simultaneously differentiating its members is considered important. This allows for the gathering of epidemiological information pertaining to the prevalence, transmission and geographical distribution of the MTC, including those MTC members associated with zoonotic TB infection in humans. Also differentiating between members of the MTC provides the clinician with inherent MTC specific drug susceptibility profiles to guide appropriate chemotherapy. METHODOLOGY/PRINCIPAL FINDINGS The aim of this study was to develop a multiplex real-time PCR assay using novel molecular targets to identify and differentiate between the phylogenetically closely related M. bovis, M. bovis BCG and M. caprae. The lpqT gene was explored for the collective identification of M. bovis, M. bovis BCG and M. caprae, the lepA gene was targeted for the specific identification of M. caprae and a Region of Difference 1 (RD1) assay was incorporated in the test to differentiate M. bovis BCG. The multiplex real-time PCR assay was evaluated on 133 bacterial strains and was determined to be 100% specific for the members of the MTC targeted. CONCLUSIONS/SIGNIFICANCE The multiplex real-time PCR assay developed in this study is the first assay described for the identification and simultaneous differentiation of M. bovis, M. bovis BCG and M. caprae in one internally controlled reaction. Future validation of this multiplex assay should demonstrate its potential in the rapid and accurate diagnosis of TB caused by these three mycobacteria. Furthermore, the developed assay may be used in conjunction with a recently described multiplex real-time PCR assay for identification of the MTC and simultaneous differentiation of M. tuberculosis, M. canettii resulting in an ability to differentiate five of the eight members of the MTC.
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Affiliation(s)
- Kate Reddington
- Microbiology, School of Natural Sciences, National University of Ireland, Galway, Ireland
- Molecular Diagnostics Research Group, National Centre for Biomedical Engineering Science (NCBES), National University of Ireland, Galway, Ireland
| | - Justin O'Grady
- Microbiology, School of Natural Sciences, National University of Ireland, Galway, Ireland
- Molecular Diagnostics Research Group, National Centre for Biomedical Engineering Science (NCBES), National University of Ireland, Galway, Ireland
| | - Siobhan Dorai-Raj
- Microbiology, School of Natural Sciences, National University of Ireland, Galway, Ireland
- Molecular Diagnostics Research Group, National Centre for Biomedical Engineering Science (NCBES), National University of Ireland, Galway, Ireland
| | - Stefan Niemann
- Molecular Mycobacteriology, Research Center Borstel, Borstel, Germany
| | - Dick van Soolingen
- National Tuberculosis Reference Laboratory, National Institute for Public Health and the Environment, Bilthoven, The Netherlands
| | - Thomas Barry
- Microbiology, School of Natural Sciences, National University of Ireland, Galway, Ireland
- Molecular Diagnostics Research Group, National Centre for Biomedical Engineering Science (NCBES), National University of Ireland, Galway, Ireland
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Good M, Duignan A. Perspectives on the History of Bovine TB and the Role of Tuberculin in Bovine TB Eradication. Vet Med Int 2011; 2011:410470. [PMID: 21547209 PMCID: PMC3087418 DOI: 10.4061/2011/410470] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2011] [Accepted: 02/16/2011] [Indexed: 11/28/2022] Open
Abstract
Tuberculosis remains a significant disease of animals and humans worldwide. Bovine tuberculosis is caused by Mycobacteria with an extremely wide host range and serious, although currently probably underdiagnosed, zoonotic potential. Where bovine tuberculosis controls are effective, human zoonotic TB, due to Mycobacterium bovis or M. caprae, is uncommon and clinical cases are infrequent in cattle. Therefore, the control and ultimate eradication of bovine tuberculosis is desirable. Tuberculin tests are the primary screening tool used in bovine eradication. The choice of tuberculin test is dependent on the environment in which it is to be used. Tuberculin potency is critical to test performance, and the accurate determination of potency is therefore particularly important. The design of a control or eradication programme should take into consideration the fundamental scientific knowledge, the epidemiological profile of disease, the experience of other eradication programmes, and the presence, in the same ecosystem, of maintenance hosts, in which infection is self-sustaining and which are capable of transmitting infection. A control or eradication programme will necessarily require modification as it progresses and must be under constant review to identify the optimal desirable goals, the efficacy of policy, and constraints to progress.
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Affiliation(s)
- Margaret Good
- Department of Agriculture, Fisheries and Food, Agriculture House, Kildare Street, Dublin 2, Ireland
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Milián-Suazo F, Pérez-Guerrero L, Arriaga-Díaz C, Escartín-Chávez M. Molecular epidemiology of human cases of tuberculosis by Mycobacterium bovis in Mexico. Prev Vet Med 2010; 97:37-44. [PMID: 20828845 DOI: 10.1016/j.prevetmed.2010.06.015] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2010] [Revised: 06/23/2010] [Accepted: 06/25/2010] [Indexed: 11/30/2022]
Abstract
The purpose of this study was to evaluate the role of Mycobacterium bovis in human cases of tuberculosis (TB) in an endemic area of the disease in cattle. Sputum, urine and other tissue samples were obtained from: (1) TB-symptomatic patients, (2) dairy farm workers and (3) abattoir workers. Samples of macroscopic lesions suspicious of TB were also obtained from cattle at slaughter in the same geographic area. A total of 562 human samples were collected: 255 from symptomatic patients, 218 from farm workers and 93 from abattoir workers. Samples were analysed by the bacillus acido-alcohol resitant (BAAR) and polymerase chain reaction (PCR) tests and cultured in Stonebrink and Löwenstein-Jensen. Spoligotyping was performed in all isolates obtained by culture and the DNA obtained by PCR. From the total number of human cases, 34 (6%) showed M. bovis spoligotype; eight spoligotypes from cattle showed an identical pattern to three spoligotypes from humans; a different set of spoligotypes from cattle (n = 8) had only one spacer difference to a set of spoligotypes from humans (n = 2). These results provide further evidence that infected cattle represent a risk to public health and support previous reports about the role of M. bovis in Mexican patients. There is no doubt that genotyping M. bovis isolates collected from cattle may have a substantial impact on our understanding of the epidemiology of TB.
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Affiliation(s)
- Feliciano Milián-Suazo
- Centro Nacional de Investigación Disciplinaria en Fisiología y Mejoramiento Animal, INIFAP, Mexico.
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Lopez-Alvarez R, Badillo-Lopez C, Cerna-Cortes JF, Castillo-Ramirez I, Rivera-Gutierrez S, Helguera-Repetto AC, Aguilar D, Hernandez-Pando R, Samper S, Gonzalez-y-Merchand JA. First insights into the genetic diversity of Mycobacterium tuberculosis isolates from HIV-infected Mexican patients and mutations causing multidrug resistance. BMC Microbiol 2010; 10:82. [PMID: 20236539 PMCID: PMC2848023 DOI: 10.1186/1471-2180-10-82] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2009] [Accepted: 03/17/2010] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The prevalence of infections with Mycobacterium tuberculosis (MTb) and nontuberculous mycobacteria (NTM) species in HIV-infected patients in Mexico is unknown. The aims of this study were to determine the frequency of MTb and NTM species in HIV-infected patients from Mexico City, to evaluate the genotypic diversity of the Mycobacterium tuberculosis complex strains, to determine their drug resistance profiles by colorimetric microplate Alamar Blue assay (MABA), and finally, to detect mutations present in katG, rpoB and inhA genes, resulting in isoniazid (INH) and rifampin (RIF) resistance. RESULTS Of the 67 mycobacterial strains isolated, 48 were identified as MTb, 9 as M. bovis, 9 as M. avium and 1 as M. intracellulare. IS6110-RFLP of 48 MTb strains showed 27 profiles. Spoligotyping of the 48 MTb strains yielded 21 patterns, and 9 M. bovis strains produced 7 patterns. Eleven new spoligotypes patterns were found. A total of 40 patterns were produced from the 48 MTb strains when MIRU-VNTR was performed. Nineteen (39.6%) MTb strains were resistant to one or more drugs. One (2.1%) multidrug-resistant (MDR) strain was identified. A novel mutation was identified in a RIF-resistant strain, GAG --> TCG (Glu --> Ser) at codon 469 of rpoB gene. CONCLUSIONS This is the first molecular analysis of mycobacteria isolated from HIV-infected patients in Mexico, which describe the prevalence of different mycobacterial species in this population. A high genetic diversity of MTb strains was identified. New spoligotypes and MIRU-VNTR patterns as well as a novel mutation associated to RIF-resistance were found. This information will facilitate the tracking of different mycobacterial species in HIV-infected individuals, and monitoring the spread of these microorganisms, leading to more appropriate measures for tuberculosis control.
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