A human hand holding three test tubes containing black flies. Verso: WHO/16565. AFRO. Onchocerciasis. Blackflies. The risk of onchocerciasis for the human population can be calculated by counting the blackflies captured at any one point and making an estimate of their total numbers.
Copyright:
WHO must be mentioned in accompanying text and/or given credit.
This item may be under copyright protection. Please ask copyright owner for permission before publishing.
Copyright Holder:
World Health Organization; Source: Record; Research date: 20151020