Posterior fossa tuberculoma in a Huichol native Mexican child: a case report.

Background: Tuberculosis is a major health concern in Mexico, especially among the native population. Tuberculomas are a frequent and severe complication of pediatric tuberculosis, these are observed as tumors in neuroimaging studies but are often not diagnosed adequately.

Case Presentation: We present a case of a 12-year-old native Mexican girl Huichol ethnicity diagnosed with a large posterior fossa tuberculoma found by imaging.

Molecular identification of Mycobacterium bovis and the importance of zoonotic tuberculosis in Mexican patients.

Setting: The epidemiology of zoonotic tuberculosis (ZTB) in humans in Mexico is poorly known.

Objective: To identify isolates of Mycobacterium bovis in humans and cattle by polymerase chain reaction (PCR), and establish the clinical and epidemiological importance of ZTB in humans.

Design: From 1995 to 2009, 124 isolates from patients with TB and 60 isolates from cattle were analysed.

Molecular analysis of Mycobacterium isolates from extrapulmonary specimens obtained from patients in Mexico.

Background: Little information is available on the molecular epidemiology in Mexico of Mycobacterium species infecting extrapulmonary sites in humans. This study used molecular methods to determine the Mycobacterium species present in tissues and body fluids in specimens obtained from patients in Mexico with extrapulmonary disease.

Methods: Bacterial or tissue specimens from patients with clinical or histological diagnosis of extrapulmonary tuberculosis were studied.

Nested polymerase chain reaction in the diagnosis of cervical tuberculous lymphadenitis in Mexican children.

Setting: Cervical tuberculous lymphadenitis (CTBL) diagnosis is a critical problem due to the difficulty in culturing Mycobacterium tuberculosis.

Objective: To evaluate a nested polymerase chain reaction (nPCR) for the diagnosis of CTBL.

Design: Thirty-eight children initially diagnosed on the basis of clinical and laboratory criteria as suffering from chronic cervical lymphadenitis were included in the study.

Epidemiologic Study of Pseudomonas aeruginosa in critical patients and reservoirs.

Background: Pseudomonas aeruginosa is a common cause of nosocomial infections, particularly in intensive care units (ICUs). The aim of this study was to characterize P. aeruginosa clinical isolates by comparing antimicrobial susceptibility patterns with the presence of plasmids and to establish the clonal relatedness by pulsed-field gel electrophoresis (PFGE) typing.