Additionally, to differentiate the skin-dwelling filariae " M . streptocerca " and " Onchocerca volvulus ", a nested polymerase chain reaction ( PCR ) assay was developed using small amounts of parasite material present in skin biopsies.
12.
Besides the terrible itch, this variety wrinkles and spots the skin and causes other pains and troubles, said Dr . Tore Godal, who heads a new World Health Organization project to rid Africa of onchocerca volvulus within 10 years.
13.
Cytotaxonomic analysis of larval chromosomes from the Kulfo River area has revealed the existence of two newly recognized species of S . soderense "; yet unlike other Black flies these species are not carriers of " Onchocerca volvulus ".
14.
These filarial nematodes and their animal hosts are often used as models for studies on the biology of human infection . " Acanthocheilonema viteae " shares considerable antigenic homology with the human filarial worm " Onchocerca volvulus "; this allows for rapid analysis of larval development which is essential to efforts in vaccine development ( Eisenbeiss et al ., 1991 ).
