Received: 6 November 2017
Accepted: 21 December 2018
First Online: 7 January 2019
Ethics approval and consent to participate
: We obtained a valid administrative authorization No. 188 /17 / MS / DDS-ATL-LIT / ZS-AS / CHUZ / SAAE / DGAP / SGA dated 24th January 2017, before taking samples from surfaces at the University Hospital of Abomey-Calavi / So-Ava in South Benin (West Africa). No sample selected in this study for publication concerns humans. In the laboratory, protection and safety measures were guaranteed.
: Not applicable.
: The authors declare that they have no competing interests.
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