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© Perrine Bomme, Guillaume Duménil, Jean-Marc Panaud.
Coloured scanning electron micrograph (SEM) of Neisseria meningitidis on epithelial cells
Publication : International journal of infectious diseases : IJID : official publication of the International Society for Infectious Diseases

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

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in International journal of infectious diseases : IJID : official publication of the International Society for Infectious Diseases - 20 Aug 2020

Tchatchouang S, Nzouankeu A, Hong E, Terrade A, Denizon M, Deghmane AE, Ndiang SMT, Pefura-Yone EW, Penlap Beng V, Njouom R, Fonkoua MC, Taha MK,

Link to Pubmed [PMID] – 32827751

Link to DOI [DOI] – S1201-9712(20)30669-X10.1016/j.ijid.2020.08.040

Int J Infect Dis 2020 Aug; 100(): 12-20

To identifyHaemophilus species and characterise the antimicrobial susceptibility of isolates from patients with respiratory tract infections (RTIs) in Cameroon.Isolates (n = 95) were from patients with RTIs obtained from two hospitals in Yaoundé, Cameroon. Isolates were identified by biochemical assay, a polymerase chain reaction (PCR)-based method, matrix-assisted laser desorption ionization-time of flight (MALDI-TOF), and whole genome sequencing. Antibiotic minimum inhibitory concentrations were determined by E-test.Haemophilus influenzae (H. influenzae) was the most prevalent species, varying from 76.8 to 84.2% according to the different methods. The isolates were mainly non-typeable (n = 70, 96%). Three H. influenzae isolates 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 52 of 94 (55.3%), and 14 of the 52 (26.9%) produced TEM-1 β-lactamase. PBP3 mutations occurred in 40 of 52 (76.9%) ampicillin-resistant isolates. Eleven isolates were chloramphenicol-resistant, with eight of 10 (80%) producing chloramphenicol acetyltransferase. Four Haemophilus isolates were rifampicin-resistant, with two mutations in rpoB gene. Five isolates were ciprofloxacin-resistant and harboured mutations in the quinolone-resistance-determining regions of gyrA and parC genes.TheH. influenzae isolates were highly diverse and showed high levels of antibiotic resistance. H. influenzae serotype b is still circulating in the post-vaccination era.

https://pubmed.ncbi.nlm.nih.gov/32827751