Maintenance and transmission of Keystone virus by Aedes atlanticus (Diptera: Culicidae) and the gray squirrel in the Pocomoke Cypress Swamp, Maryland.
نویسندگان
چکیده
0 J. Med. Entomol. 25(6): 493-500 (1988) CJ ABSTRACT -Ecological studies were done in the Pocomoke Cypress Swamp, Worchester Co., Md., to clarify the role of Aedes atlanticus and gray squirrels as enzo6tic hosts of Keystone (KEY) virus. Among 43 seronegative squirrels, 65% were infected with KEY virus during July, August, and September 1975, coincident with the emergence and activity of KEY virus-infected Ae. atlantlcus. Minimum infection rates for this mosquito increased from 2.7 to 11.2/1,000 from July to October, but we could not conclude that KEY virus-infected squirrels served as an amplifying host. Although Ae. atlanticus was infected readily following per os exposure to KEY virus, only I of 83 infected mosquitoes transmitted virus to a suckling mouse. In contrast, 33 of 46 (72%) parenterally infected Ae. atlanticus transmitted virus to mice. KEY virus also was transmitted vertically by Ae. atlanticus to F, progeny, and one of two vertically infected females transmitted virus to suckling mice by bite. Preliminary data suggested that the per os-infected mosquitoes failed to transmit KEY virus because of a midgut escape, salivary gland barrier(s), or both.
منابع مشابه
Serologic Evidence of Jamestown Canyon Anc Keystone Virus Infection in Vertebrates T - ' Te of the Delmarva Peninsula
Serological data accumulated during the past decade indicated that a variety of feral and domestic animals of the Delaware-Maryland-Virginia (DelMarVa) Peninsula were infected with Jamestown Canyon (JC) and/or Keystone (KEY) viruses (Bunyaviridae, California serogroup). Neutralizing (N) antibody to JC virus was most prevalent in white-tailed deer, sika deer, cottontail rabbits and horses. KEY v...
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Serological data accumulated during the past decade indicated that a variety of feral and domestic animals of the Delaware-Maryland-Virginia (DelMarVa) Peninsula were infected with Jamestown Canyon (JC) and/or Keystone (KEY) viruses (Bunyaviridae, California serogroup). Neutralizing (N) antibody to JC virus was most prevalent in white-tailed deer, sika deer, cottontail rabbits and horses. KEY v...
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عنوان ژورنال:
- Journal of medical entomology
دوره 25 6 شماره
صفحات -
تاریخ انتشار 1988