Munstermann L E, Wesson D M
Department of Biological Sciences, University of Notre Dame, IN 46556.
J Am Mosq Control Assoc. 1990 Jun;6(2):235-43.
Aedes albopictus collected in the East St. Louis, Illinois, area were found infected with the gregarine protozoan, Ascogregarina taiwanensis. Infection rates varied from 67 to 95% at 4 sites and 0 to 10% at 2 others. Lower infection levels were found in Ae. epactius (42%) and Culex restuans (one larva). Four mosquito species were cross-infected in the laboratory with gregarines isolated from field-collected hosts. Aedes atropalpus was 90% susceptible to A. taiwanensis (100% in Ae. albopictus), with abnormal development and some melanization of trophozoites and gametocysts. In Ae. aegypti and Cx. restuans, the experimental infection was much lower (12-56%) and exhibited abnormalities similar to the Ae. atropalpus infections. Ascogregarina oocysts recovered from both Ae. aegypti and Ae. atropalpus hosts were subsequently infective to Ae. albopictus. In Ae. triseriatus, A. taiwanensis infection was very low (25%, 1-2 trophozoites per larva); gametocysts were not observed nor were infectious oocysts obtained. We conclude that A. taiwanensis, newly introduced to the USA with Ae. albopictus, can develop in 4 indigenous mosquito species and can produce deleterious effects in at least 2, Ae. aegypti and Ae. atropalpus.
在伊利诺伊州东圣路易斯地区采集的白纹伊蚊被发现感染了簇虫原生动物台湾簇虫。在4个地点，感染率在67%至95%之间，而在另外2个地点则为0至10%。在骚扰伊蚊（感染率42%）和环跗库蚊（1只幼虫）中发现了较低的感染水平。在实验室中，从野外采集的宿主中分离出的簇虫对4种蚊虫进行了交叉感染。棕黑伊蚊对台湾簇虫的易感性为90%（白纹伊蚊为100%），滋养体和配子囊出现发育异常和一些黑化现象。在埃及伊蚊和环跗库蚊中，实验感染率要低得多（12% - 56%），且表现出与棕黑伊蚊感染相似的异常情况。从埃及伊蚊和棕黑伊蚊宿主中回收的台湾簇虫卵囊随后对白纹伊蚊具有感染性。在三带喙库蚊中，台湾簇虫的感染率非常低（25%，每只幼虫有1 - 2个滋养体）；未观察到配子囊，也未获得感染性卵囊。我们得出结论，随着白纹伊蚊新引入美国的台湾簇虫能够在4种本土蚊虫物种中发育，并至少对2种蚊虫，即埃及伊蚊和棕黑伊蚊产生有害影响。
