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. 1998 Sep;17(9 Suppl):S192-4.
doi: 10.1097/00006454-199809001-00023.

The etiology of bacterial pneumonia and meningitis in Vietnam

T T Tran  1 , Q T Le, T N Tran, N T Nguyen, F K Pedersen, M Schlumberger
Affiliations

The etiology of bacterial pneumonia and meningitis in Vietnam

T T Tran et al. Pediatr Infect Dis J. 1998 Sep.

Abstract

Background: To date no studies on the incidence of Haemophilus influenzae type b (Hib) disease, Hib carrier rates in infants and children or the proportion of bacterial meningitis cases caused by Hib in Vietnam have been performed. The availability of safe and highly effective Hib vaccines makes such information important.

Methods: The bacterial etiology of a sample of infants and children with pneumonia and meningitis seen at Pediatric Hospital No. 1 in Ho Chi Minh City was studied by culture and latex agglutination of blood, cerebrospinal fluid, urine and pleural fluid. The carriage rate of pneumococci and Hib was studied in a sample of outpatient children.

Results: Hib caused 53% of 34 culture-proven bacterial meningitis cases and pneumococci caused 18%. Of 31 meningitis cases diagnosed by latex agglutination, 39% were caused by Hib and 55% by pneumococci. Ninety percent of cases of Hib meningitis occurred in children <1 year of age. Fifty percent of meningitis cases were associated with acute respiratory infection. In 213 bacteremic pneumonia cases 92.5% of blood cultures grew Streptococcus pneumoniae and only 1% grew Hib. The carrier rate of Hib in outpatients <5 years of age with upper respiratory tract infection increased from 2% to 7.6% between 1993 and 1996.

Conclusion: Hib is the most frequent cause of meningitis in infants and children admitted to hospitals in South Vietnam. Ninety percent of Hib meningitis cases occur in patients < 1 year of age. Bacteremic Hib pneumonia in Vietnam is rare. The results suggest that Hib is the major cause of meningitis in Vietnam but do not permit conclusions regarding its true incidence. The carrier rate of Hib in children <5 years of age in Vietnam has increased to approximately 7% since 1993.

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