Abstract:
BACKGROUND:To investigate the genetic diversity of Haemophilus influenzae positive samples among French pilgrims attending the 2018 Hajj pilgrimage. METHOD:After screening by qPCR, multilocus sequence typing was performed for all H. influenzae-positive samples. The following housekeeping genes were amplified and assigned: adk, atpG, frdB, fucK, mdh, pgi and recA. RESULTS:121 pilgrims were included. H. influenzae was positive in 35.5% pre-Hajj samples, 12.4% at day five post-arrival, 15.7% at day 12 post-arrival, and 43.0% post-Hajj. Of the 129 positive swabs for H. influenzae, only one sample at D12 was negative for all seven genes amplified by standard PCR. The adk, atpG, frdB, mdh, pgi, recA and fucK genes were positive in 123, 107, 122, 70, 127, 118 and 69 samples, respectively. One sequence of atpG and two of recA genes were not possible to assign. None of the sequences of fucK gene was successfully obtained. Consequently, a complete sequence type characterisation was not possible. Of the 128 obtained strains, 111 had distinct patterns of alleles. CONCLUSION:H. influenzae genotypes acquired were completely different from those present at pre-Hajj. We observed a great biodiversity and a lack of clonality of H. influenzae among French pilgrims during the 2018 Hajj. Further studies aiming at studying the genome of Hajj-acquired H. influenzae isolates are needed to define the clinical burden of H. influenzae infection during Hajj and to evaluate the potential interest of vaccination in Hajj pilgrims.
journal_name
Travel Med Infect Disjournal_title
Travel medicine and infectious diseaseauthors
Hoang VT,Dao TL,Ly TDA,Belhouchat K,Larbi Chaht K,Yezli S,Alotaibi B,Raoult D,Parola P,Pommier de Santi V,Fournier PE,Gautret Pdoi
10.1016/j.tmaid.2020.101883subject
Has Abstractpub_date
2020-01-01 00:00:00pages
101883eissn
1477-8939issn
1873-0442pii
S1477-8939(20)30379-3journal_volume
38pub_type
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