RESUMO
BACKGROUND: Tuberculosis (TB) and drug-resistant TB (DR-TB) are national health burdens in Vietnam. In this study, we investigated the prevalence of rifampicin (RIF) and/or isoniazid (isonicotinic acid hydrazide, INH) resistance in patients with suspected TB, and applied appropriate techniques to help rapidly target DR-TB. METHODS: In total, 1,547 clinical specimens were collected and cultured using the BACTEC MGIT system (Becton Dickinson and Co.). A resazurin microtiter assay (REMA) was used to determine the proportions of RIF and/or INH resistance. A real-time polymerase chain reaction panel with TaqMan probes was employed to identify the mutations of rpoB and katG associated with DR-TB in clinical isolates. Genotyping of the identified mutations was also performed. RESULTS: A total of 468 Mycobacterium tuberculosis isolates were identified using the REMA. Of these isolates, 106 (22.6%) were found to be resistant to 1 or both antibiotics. Of the resistant isolates, 74 isolates (69.8%) were resistant to isoniazid (INH) only, while 1 isolate (0.94%) was resistant to RIF only. Notably, 31 isolates (29.24%) were resistant to both antibiotics. Of the 41 phenotypically INH-resistant isolates, 19 (46.3%) had the Ser315Thr mutation. There were 8 different rpoB mutations in 22 (68.8%) of the RIF-resistant isolates. The most frequently detected mutations were at codons 531 (37.5%), 526 (18.8%), and 516 (6.3%). CONCLUSION: To help prevent new cases of DR-TB in Vietnam, it is crucial to gain a comprehensive understanding of the genotypic DR-TB isolates.
RESUMO
Objective: Our study aimed to summarize symptoms and laboratory findings of bacterial meningitis at a Vietnam tertiary care hospital. Methods: We performed a retrospective study and enrolled 33 children diagnosed with bacterial meningitis admitted at the Pediatric Center, Hue Central Hospital, between January 2019 and July 2021. Results: Only 24.2% (8 out of 33) cases can determine etiology of bacterial meningitis. Streptococcus pneumonia was the most common pathogen. The mortality in this study was 12.1%. The most commn symptoms were fever (93.9%) and vomiting (60.6%). Loss of consciousness and poor appetite were predominant among patients who died (75%); seizures and local paralysis accounted for a half. For cerebrospinal fluid (CSF), the cloudy or turbid color was the most common in bacterial meningitis (54.5%), CSF leucocytes in a half of patients were greater than 500 cells/mm3 (48.5%). CSF white blood cells count was higher among children who died. Conclusion: Streptococcus pneumonia was the most common pathogen. Fever, vomiting, loss of consciousness, local paralysis, and increased leucocytes, neutrophils of CSF were more common in severe cases.
