DOI: 10.17151/biosa.2018.17.2.1
How to Cite
Cabello Vílchez, A. M., & Núñez Ato, R. G. (2018). Isolation and molecular characterization of nontuberculous mycobacteria in the water distribution system in a hospital of Lima (Perú). Biosalud, 17(2), 7–24. https://doi.org/10.17151/biosa.2018.17.2.1

Authors

Alfonso Martín Cabello Vílchez

PhD. Ciencias Bio-Farmacéuticas. Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia. Lima, Perú. 

Universidad Peruana Cayetano Heredia
amcabello_v@yahoo.com
https://orcid.org/0000-0003-2284-6042
Ronald G. Núñez Ato

Licenciado Tecnólogo Medico, Laboratorio Clínico. Universidad Peruana Cayetano Heredia. Lima, Perú.

Universidad Peruana Cayetano Heredia
ronaldupch@hotmail.com
https://orcid.org/0000-0002-3256-5183

Abstract

Introduction: Mycobacterial infections can cause skin and lung lesions. Mycobacteria can be found in intra-hospital water sources which can reach immuno-suppressed patients and cause severe disease. Objective: To isolate and characterize non-tuberculous mycobacteria in the water distribution system in a hospital in Lima. Materials and Methods: Mycobacteria were isolated in conventional culture egg-based media and biochemical tests and molecular tools such as polymerase chain reaction (PCR) and sequencing were used for their identification. The GenBank was used for sequencing analysis and MEGA 6 was used for the phylogenetic tree. Results: Isolation of acid-fast bacilli was possible in samples of cold drinking water, although not in the hospital hot water. Several species of non-tuberculous mycobacteria were isolated and identified in the water samples being a 100% of rapid growth such as Mycobacterium canariasense, M. frederiksbergense, Mycobacterium fortuitum, Mycobacterium chelonae, and M. mucogenicum. Conclusions: This is the first time that mycobacteria are isolated in drinking water at a hospital in Perú. It is concluded that the existence of mycobacteria in hospital water could be a potential source of nosocomial outbreaks and should be analyzed periodically.

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