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Koevolution von Überträger und Parasit bei Simuliiden und Nematoden 1
Author(s) -
Wenk P.
Publication year - 1976
Publication title -
zeitschrift für angewandte entomologie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.795
H-Index - 60
eISSN - 1439-0418
pISSN - 0044-2240
DOI - 10.1111/j.1439-0418.1976.tb03355.x
Subject(s) - onchocerca , biology , parasite hosting , body cavity , vector (molecular biology) , zoology , host (biology) , larva , simulium , filarioidea , anatomy , filariasis , ecology , helminths , onchocerciasis , onchocerca volvulus , immunology , genetics , world wide web , computer science , gene , recombinant dna
Coevolution of vector and parasite in simuliids and nematods Mermithids parasitizing the larvae of simuliids mostly kill their host in one of the prepupal stages when they perforate the host's skin during emergence from the body cavity. However, a certain proportion of parasites pass the pupal stage and are transported upstream within the adults inducing the flies to “oviposit” the parasite thus obviously compensating the drift by the river flow. ‐ Simulium vector species of several Onchocerca filariae parasitizing cattle, deer and roe prefer certain body regions for bloodsucking (e.g. the ears or the belly). The microfilariae of the Onchocerca species concentrate in the same skin areas attacked by the respective vector species: These are sometimes far distant from the location of adult worms, e.g. microfilariae concentrate in the ears hereas the adult worms are located subcutaneously near the tibiotarsal joints. Besides the well known coincidence of nocturnal flight activity of culicid vectors and nocturnal circulation of microfilariae in the blood ( Wuchereria and Brugia ) a similar but local coincidence apparently exists in the skin of the body regions which are attacked by the vectors and entered by the microfilariae of the appropriate Onchocerca filariae .