SELECTION OF A STRAIN OF CULEX-TARSALIS HIGHLY RESISTANT TO INFECTION FOLLOWING INGESTION OF WESTERN EQUINE ENCEPHALOMYELITIS VIRUS

被引:63
作者
HARDY, JL
APPERSON, G
ASMAN, SM
REEVES, WC
机构
[1] UNIV CALIF BERKELEY,SCH PUBL HLTH,DEPT BIOMED & ENVIRONM HLTH SCI,BERKELEY,CA 94720
[2] UNIV CALIF BERKELEY,DEPT ENTOMOL SCI,BERKELEY,CA 94720
关键词
D O I
10.4269/ajtmh.1978.27.313
中图分类号
R1 [预防医学、卫生学];
学科分类号
1004 ; 120402 ;
摘要
After prolonged selection, two hybrid strains of Culex tarsalis were evolved that were highly resistant to infection following ingestion of western equine encephalomyelitis virus. These strains were greater than 25,000-fold more resistant than the most susceptible parental strain when fed on viremic chicks. Resistance was associated with a mesenteronal barrier since both refractory and parental strains were equally susceptible to infection by intrathoracic inoculation. Susceptibility was dominant, possibly incompletely dominant, over resistance. Inheritance was probably polyfactorial but this could not be determined with certainty since a small proportion of individuals appeared to become infected by nongenetic mechanisms.
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页码:313 / 321
页数:9
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