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Cordero-Martinez FC, Vera-Cabrera L, Ocampo-Candiani J, Riojas-Hernández ED, Molina-Torres CA. Isolation and characterization of nontuberculous mycobacteria in drinking water of Monterrey, Mexico. Salud Publica Mex 2023; 66:10-11. [PMID: 38065110 DOI: 10.21149/15084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2023] [Accepted: 07/28/2023] [Indexed: 12/18/2023] Open
Affiliation(s)
| | - Lucio Vera-Cabrera
- Demartology Department, Hospital Universitario Dr. José Eleutorio González. Monterrey, Mexico..
| | - Jorge Ocampo-Candiani
- Demartology Department, Hospital Universitario Dr. José Eleutorio González. Monterrey, Mexico..
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Vera-Cabrera L, Cardenas-de la Garza JA, Cuellar-Barboza A, Gallardo-Rocha A, Molina-Torres CA, Escalante-Fuentes W, Ocampo-Candiani J. Case Report: Coral Reef Pathogen Aspergillus sydowii Causing Black Grain Mycetoma. Am J Trop Med Hyg 2021; 104:871-873. [PMID: 33399044 PMCID: PMC7941817 DOI: 10.4269/ajtmh.20-1352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Accepted: 11/09/2020] [Indexed: 11/07/2022] Open
Abstract
Mycetoma is an infrequent subcutaneous infection caused by true fungi (eumycetoma) or aerobic actinomycetes (actinomycetoma). We report the case of a 62-year-old man with eumycetoma involving the left foot and ankle. Skin biopsy revealed black-brown grains, and in culture, a white colony fungus grew at day 8. Molecular sequencing using ITS1-ITS4 primers identified the species as Aspergillus sydowii. The patient was treated with itraconazole 200 mg twice daily and terbinafine 250 mg daily for 8 months, with complete response and no recurrence after 2.5 years of follow-up. Aspergillus sydowii is a saprotrophic fungus that rarely causes skin or nail disease. No cases of eumycetoma caused by this agent have been previously reported. As its geographic distribution continues to expand, it may increasingly be recognized as a cause of human disease.
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Affiliation(s)
- Lucio Vera-Cabrera
- Laboratorio Interdisciplinario de Investigación Dermatológica, Servicio de Dermatología, Hospital Universitario “Dr. José Eleuterio González”, Universidad Autónoma de Nuevo León, Monterrey, México
| | | | - Adrian Cuellar-Barboza
- Laboratorio Interdisciplinario de Investigación Dermatológica, Servicio de Dermatología, Hospital Universitario “Dr. José Eleuterio González”, Universidad Autónoma de Nuevo León, Monterrey, México
| | - Anabel Gallardo-Rocha
- Laboratorio Interdisciplinario de Investigación Dermatológica, Servicio de Dermatología, Hospital Universitario “Dr. José Eleuterio González”, Universidad Autónoma de Nuevo León, Monterrey, México
| | - Carmen Amelia Molina-Torres
- Laboratorio Interdisciplinario de Investigación Dermatológica, Servicio de Dermatología, Hospital Universitario “Dr. José Eleuterio González”, Universidad Autónoma de Nuevo León, Monterrey, México
| | - Wendy Escalante-Fuentes
- Laboratorio Interdisciplinario de Investigación Dermatológica, Servicio de Dermatología, Hospital Universitario “Dr. José Eleuterio González”, Universidad Autónoma de Nuevo León, Monterrey, México
| | - Jorge Ocampo-Candiani
- Laboratorio Interdisciplinario de Investigación Dermatológica, Servicio de Dermatología, Hospital Universitario “Dr. José Eleuterio González”, Universidad Autónoma de Nuevo León, Monterrey, México
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Molina-Torres CA, Flores-Castillo ON, Carranza-Torres IE, Guzmán-Delgado NE, Viveros-Valdez E, Vera-Cabrera L, Ocampo-Candiani J, Verde-Star J, Castro-Garza J, Carranza-Rosales P. Ex vivo infection of murine precision-cut lung tissue slices with Mycobacterium abscessus: a model to study antimycobacterial agents. Ann Clin Microbiol Antimicrob 2020; 19:52. [PMID: 33222688 PMCID: PMC7680588 DOI: 10.1186/s12941-020-00399-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2019] [Accepted: 11/12/2020] [Indexed: 01/02/2023] Open
Abstract
Background Multidrug-resistant infections due to Mycobacterium abscessus often require complex and prolonged regimens for treatment. Here, we report the evaluation of a new ex vivo antimicrobial susceptibility testing model using organotypic cultures of murine precision-cut lung slices, an experimental model in which metabolic activity, and all the usual cell types of the organ are found while the tissue architecture and the interactions between the different cells are maintained. Methods Precision cut lung slices (PCLS) were prepared from the lungs of wild type BALB/c mice using the Krumdieck® tissue slicer. Lung tissue slices were ex vivo infected with the virulent M. abscessus strain L948. Then, we tested the antimicrobial activity of two drugs: imipenem (4, 16 and 64 μg/mL) and tigecycline (0.25, 1 and 4 μg/mL), at 12, 24 and 48 h. Afterwards, CFUs were determined plating on blood agar to measure the surviving intracellular bacteria. The viability of PCLS was assessed by Alamar Blue assay and corroborated using histopathological analysis. Results PCLS were successfully infected with a virulent strain of M. abscessus as demonstrated by CFUs and detailed histopathological analysis. The time-course infection, including tissue damage, parallels in vivo findings reported in genetically modified murine models for M. abscessus infection. Tigecycline showed a bactericidal effect at 48 h that achieved a reduction of > 4log10 CFU/mL against the intracellular mycobacteria, while imipenem showed a bacteriostatic effect. Conclusions The use of this new organotypic ex vivo model provides the opportunity to test new drugs against M. abscessus, decreasing the use of costly and tedious animal models.
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Affiliation(s)
- Carmen Amelia Molina-Torres
- Servicio de Dermatología, Hospital Universitario "José E. González", Universidad Autónoma de Nuevo León, Monterrey, NL, México
| | | | - Irma Edith Carranza-Torres
- Facultad de Ciencias Biológicas, Universidad Autónoma de Nuevo León, Monterrey, NL, México.,Centro de Investigación Biomédica del Noreste, Instituto Mexicano del Seguro Social, Monterrey, NL, México
| | - Nancy Elena Guzmán-Delgado
- División de Investigación en Salud, UMAE, Hospital de Cardiología #34, Instituto Mexicano del Seguro Social, Monterrey, NL, México
| | | | - Lucio Vera-Cabrera
- Servicio de Dermatología, Hospital Universitario "José E. González", Universidad Autónoma de Nuevo León, Monterrey, NL, México
| | - Jorge Ocampo-Candiani
- Servicio de Dermatología, Hospital Universitario "José E. González", Universidad Autónoma de Nuevo León, Monterrey, NL, México
| | - Julia Verde-Star
- Facultad de Ciencias Biológicas, Universidad Autónoma de Nuevo León, Monterrey, NL, México
| | - Jorge Castro-Garza
- Centro de Investigación Biomédica del Noreste, Instituto Mexicano del Seguro Social, Monterrey, NL, México
| | - Pilar Carranza-Rosales
- Centro de Investigación Biomédica del Noreste, Instituto Mexicano del Seguro Social, Monterrey, NL, México.
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Molina-Torres CA, Tamez-Peña L, Castro-Garza J, Ocampo-Candiani J, Vera-Cabrera L. Evaluation of the intracellular activity of drugs against Mycobacterium abscessus using a THP-1 macrophage model. J Microbiol Methods 2018; 148:29-32. [PMID: 29626567 DOI: 10.1016/j.mimet.2018.03.020] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Revised: 03/27/2018] [Accepted: 03/27/2018] [Indexed: 11/28/2022]
Abstract
We evaluated the antimicrobial effectiveness against M. abscessus in a THP-1 cell line model. No intracellular activity was observed when using amikacin or imipenem. A bacteriostatic effect was observed for cefoxitin, clarithromycin and azithromycin. Tigecycline showed the best antibacterial effect by decreasing the intracellular growth up to bactericidal level.
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Affiliation(s)
- Carmen Amelia Molina-Torres
- Servicio de Dermatología, Hospital Universitario, Universidad Autónoma de Nuevo León, Monterrey, N.L., Mexico.
| | - Lorena Tamez-Peña
- Servicio de Dermatología, Hospital Universitario, Universidad Autónoma de Nuevo León, Monterrey, N.L., Mexico
| | - Jorge Castro-Garza
- Centro de Investigación Biomédica del Noreste, IMSS, Monterrey, N.L., Mexico
| | - Jorge Ocampo-Candiani
- Servicio de Dermatología, Hospital Universitario, Universidad Autónoma de Nuevo León, Monterrey, N.L., Mexico
| | - Lucio Vera-Cabrera
- Servicio de Dermatología, Hospital Universitario, Universidad Autónoma de Nuevo León, Monterrey, N.L., Mexico
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Molina-Torres CA, Castro-Garza J, Ocampo-Candiani J, Monot M, Cole ST, Vera-Cabrera L. Effect of serial subculturing on the genetic composition and cytotoxic activity of Mycobacterium tuberculosis. J Med Microbiol 2010; 59:384-391. [PMID: 20056774 DOI: 10.1099/jmm.0.015966-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Continuous subculture has been observed to produce changes in the virulence of micro-organisms, e.g. rabies virus, poliovirus and Mycobacterium bovis BCG. The latter has been used as a vaccine for tuberculosis for the last 100 years; however, in some instances its efficacy has been observed to be very low. In order to determine whether similar changes can be produced in Mycobacterium tuberculosis, we selected four isolates, M. tuberculosis H37Rv, a Beijing strain (DR-689), and two more isolates with deletion of the phospholipase C locus (plcA-plcB-plcC ), and subjected them to serial culturing on Middlebrook 7H9 medium, with or without ox bile. After 100 passages, we performed RFLP-IS6110 analysis to determine whether genomic changes were produced. We also checked their genomic composition by microarray analysis. Changes in virulence were studied by measuring the cytotoxic effect of parental and subcultured isolates on a THP-1 macrophage monolayer. The most visible change was the change of position of an IS6110 band of approximately 1400 bp to approximately 1600 bp in the Beijing isolate subcultured in the ox bile medium. Analysis by microarray and PCR confirmation did not reveal any genomic changes. Cytotoxic activity was decreased in the isolates at levels close to that of BCG, and more consistently in those subcultured in the presence of ox bile.
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Affiliation(s)
- C A Molina-Torres
- Servicio de Dermatología, Hospital Universitario 'JoséE. González', Monterrey NL, Mexico
| | - J Castro-Garza
- División de Biología Celular y Molecular,Centro de Investigación Biomédica del Noreste, IMSS, MonterreyNL, Mexico
| | - J Ocampo-Candiani
- Servicio de Dermatología, Hospital Universitario 'JoséE. González', Monterrey NL, Mexico
| | - M Monot
- Global Health Institute, Ecole Polytechnique Fédéralede Lausanne, EPFL SV/GHI/UPCOL, Station no. 15, CH-1015 Lausanne,Switzerland
| | - S T Cole
- Global Health Institute, Ecole Polytechnique Fédéralede Lausanne, EPFL SV/GHI/UPCOL, Station no. 15, CH-1015 Lausanne,Switzerland
| | - L Vera-Cabrera
- Servicio de Dermatología, Hospital Universitario 'JoséE. González', Monterrey NL, Mexico
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