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Morphology of Nonperiodic Form of Brugia malayi, Causative Agent of Human of Filariasis in East Kalimantan (Morfologi Brugia malayi Nonperiodik Penyebab Filariasis di Kalimantan Timur)
Morphological observations were made on the adult filaria worms of nonperiodic from of B.malayi (32 worms), the new subspecles of the causative agent of filariasis in East Kalimanan (3,4). The filaria parasites were compared to the old subspecies of noctumally subperiodic form of B. malai (25 worms) from Kendari and the animal filaria B. pahangi (20 worms) which were also sympatic in East Kalimantan. The adult filarial worms (orginated from human/animal carrier) were available from dissection of artificially infected laboratory animal of Mariones ungiiculatus. For the artificial, Aedes togoi Theobald mosquito were used as laboratory vector. The observations revealed a morphological gap, between B.malayi (nonperiodic form) and B. pahangi coexisting in East Kalimanan showed a reproductive isolation as a differerent species. Morphologically, the B. malayi from East Kalimantan should be put in the same species category with the nocturnaly subperiodic form of B. malayi from Kendari. Showing more anthropo or zoophilic (cf 1,2) properties of parasite intraspecific variabilities in morphology, were also recorded from the filarial worms with an average of the nonperiodic form shorter than the nocturnally subperiodic form of B. malayi, but longer than the animal parasites of B. pahangi.
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