| effect of environmental temperature on the vector competence of culex pipiens and cx. torrentium for ockelbo virus. | the effects of environmental temperature on ockelbo virus infection, dissemination, and transmission were studied in culex torrentium and in the uppsala and the el gabal strains of cx. pipiens. temperatures tested included 10 degrees c, 17 degrees c, 24 degrees c, and a cyclic (10-24 degrees c, mean = 17 degrees c) regimen designed to mimic typical hourly temperatures in an area endemic for ockelbo disease in sweden during the transmission season. the vector competence of both the uppsala and th ... | 1990 | 2173433 |
| ecologic studies of mosquitoes and birds as hosts of ockelbo virus in sweden and isolation of inkoo and batai viruses from mosquitoes. | field studies were conducted in central sweden from 1983 through 1985 to obtain information on the etiologic agent of ockelbo disease, described in sweden in the 1960s and probably identical to pogosta disease in finland and to karelian fever in the western ussr. mosquitoes (63,644) collected during this 3 year period yielded 21 virus strains. ockelbo virus isolations were from culiseta morsitans (5 strains), culex pipiens and/or cx. torrentium (6 strains), and aedes cinereus (3 strains). inkoo ... | 1989 | 2572178 |
| overwintering of culex mosquitoes in sweden and their potential as reservoirs of human pathogens. | 1. culex pipiens l. and cx torrentium martini are suspected enzootic vectors in sweden of sindbis virus causing ockelbo disease in man. to estimate their potential as virus reservoirs over the winter, mosquitoes were collected from august to may from a cellar in a rural area, central sweden. the mosquitoes were dissected and examined for blood content, gonotrophic stage, parity and insemination, and tested for fructose. 2. cx pipiens, cx torrentium and cx territans walker constituted 94% of 887 ... | 1987 | 2856507 |
| seasonal activity of mosquitoes in an ockelbo disease endemic area in central sweden. | in the sässman area, province of hälsingland, sweden, mosquitoes were sampled in 1983 from aquatic habitats, overwintering sites, cattle sheds, human bait, with uv-light traps, rabbit-, guinea-pig-, hen-, dove- and unbaited suction traps and similarly baited net traps. anopheles beklemishevi, an. messeae, aedes cantans, ae. cataphylla, ae. cinereus, ae. communis, ae. diantaeus, ae. excrucians, ae. hexodontus, ae. intrudens, ae. leucomelas, ae. pionips, ae. punctor, ae. vexans, culex pipiens, cx. ... | 1986 | 2906960 |
| diel activity patterns of blood-seeking anthropophilic mosquitoes in central sweden. | 1. blood-seeking diel activity cycles of mosquitoes are described from 24 h landing catches on human bait in a field and a forest habitat during june-august in central sweden. 2. daytime activity in the field was low or absent, whilst in the forest activity was relatively even throughout the diel. 3. in both habitats, activity peaks generally occurred about sunset and sunrise and were more distinct in the field than in the forest. 4. data from this and other studies show that, in general, aedes ... | 1988 | 2908783 |
| swedish culex torrentium and cx. pipiens (diptera: culicidae) as experimental vectors of ockelbo virus. | the ability of the sibling species culex pipiens (l.) and culex torrentium (martini) from central sweden to transmit ockelbo (ock) virus was determined. both species became infected after ingesting ock virus from a viremic chicken; they transmitted this virus to chickens after 21-28 d of extrinsic incubation. in cx. torrentium, infection rates were 90% or higher, and all 10 refeeding mosquitoes transmitted virus after feeding on chickens with a viremia of at least 10(3.0) plaque-forming units (p ... | 1990 | 2167372 |