Dirofilaria magnilarvatum Price, 1959 (Nematoda: Filarioidea) from Macaca irus Cuvier. IV. Notes on Larval Development in Mansonioides Mosquitoes

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Abstract
The development of the microfilariae of Dirofilaria magnilarvatum from Macaca irus was observed in Mansonia (Mansonioides) longipalpis and M. uniformis. A monkey infected with both D. magnilarvatum and Wuchereria malayi was used in most experiments. Microfilariae of D. magnilarvatum were ingested by M. longipalpis and M. uniformis, but the number ingested was not related to the estimated micro-filarial density in the blood as in the case of W. malayi. Development of the larvae took place in the Malpighian tubules. In M. longipalpis some stage III larvae were found 10.5 days after the infecting blood meal, and most larvae were stage III by 12.5 days. The development of larvae of D. magnilarvatum was slightly slower in M. uniformis than in M. longipalpis in that no stage HI larvae were present in the former mosquitoes examined 10.5 days after the infecting blood meal. Microfilaria of W. malayi were nearly all stage III after 10.5 days in M. uniformis. The stage III larvae resembled D. immitis, the only difference observed being in the form of the terminal papillae. Stage III larvae were 960 to 1095 [mu] in length, much shorter than W. malayi larvae in the same mosquitoes which were 1335 to 1725 [mu].

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