Skip to Main content Skip to Navigation
Journal articles

Analysis of Haemophilus species in patients with respiratory tract infections in Yaoundé, Cameroon

Abstract : Objectives: To identifyHaemophilus species and characterize antimicrobial susceptibility of isolates from patients with respiratory tract infections (RTIs) in Cameroon. Methods: Isolates (n = 95) were from patients with RTIs obtained from two Hospitals in Yaoundé, Cameroon. Isolates were identified by biochemical assay, PCR-based method, MALDI-TOF and whole genome sequencing. Antibiotic minimum inhibitory concentrations were determined by E-test. Results: H. influenzae was the most prevalent species varying from 76.8% to 84.2% according to different methods. The isolates were mainly nontypable (n = 70, 96%). Three isolates of H. influenzae were capsulated (b, e and f). The isolates were genetically diverse and 40 unique sequence types were identified including 11 new ones. Resistance to ampicillin was observed among 55.3% (52/94) and 9% (14/52) produced TEM-1 β-lactamase. PBP3 mutations occurred in 57.7% of ampicillin resistant isolates (30/52). Eleven isolates were chloramphenicol resistant with 80% producing chloramphenicol acetyltransferase (8/10). Four Haemophilus isolates were rifampicin resistant with two mutations in rpoB gene. Five isolates were ciprofloxacin resistant and harbored mutations in the quinolone resistance determining regions of gyrA and parC genes. Conclusion: H. influenzae isolates are highly diverse and show high levels of antibiotic resistance. H. influenzae serotype b is still circulating in the post-vaccination era.
Document type :
Journal articles
Complete list of metadata

https://hal-pasteur.archives-ouvertes.fr/pasteur-03261553
Contributor : Ala-Eddine Deghmane <>
Submitted on : Tuesday, June 15, 2021 - 5:46:33 PM
Last modification on : Monday, June 28, 2021 - 1:02:06 PM

File

Tchatchouang et al2020.pdf
Publication funded by an institution

Licence


Distributed under a Creative Commons Attribution - NonCommercial - NoDerivatives 4.0 International License

Identifiers

Collections

Citation

Serges Tchatchouang, Ariane Nzouankeu, Eva Hong, Aude Terrade, Mélanie Denizon, et al.. Analysis of Haemophilus species in patients with respiratory tract infections in Yaoundé, Cameroon. International Journal of Infectious Diseases, Elsevier, 2020, 100, pp.12-20. ⟨10.1016/j.ijid.2020.08.040⟩. ⟨pasteur-03261553⟩

Share

Metrics

Record views

35

Files downloads

81