1921
Volume 20, Issue 1
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645
USD

Abstract

Abstract

In 1966 and 1967, from a freshwater swamp in northwest Hillsborough County, Florida, 165,354 mosquitoes were collected in CDC light traps supplemented with Dry Ice. Virus isolation was attempted from species pools of all collections. There were 128 isolations of the California group arboviruses Keystone and trivittatus: 99 from , 28 from , and 1 from . Keystone virus was most abundant (119 isolations) and was found most often in ; 8 of 9 isolations of trivittatus virus were from . In both years, isolation of virus was made from the first generation of that appeared after the first heavy spring rain. The largest number of isolations was made in August, when peak densities of these mosquitoes occurred. Oviparity rates and minimum infection rates of both species appeared to be related; precipitin tests indicated that they fed mainly on wild mammals. The higher rates of feeding of on rodents may be significant in view of the consistently higher infection rate in this species and the recent isolation of Keystone virus from two wild-caught cotton rats (). Moreover, a marked increase in the infection rate with California group viruses of in 1967 over 1966 corresponds with a doubled rate of feeding on rodents. No evidence of transovarian transmission of virus was found in nulliparous mosquitoes of both species.

Loading

Article metrics loading...

/content/journals/10.4269/ajtmh.1971.20.139
1971-01-01
2017-09-22
Loading full text...

Full text loading...

http://instance.metastore.ingenta.com/content/journals/10.4269/ajtmh.1971.20.139
Loading
  • Accepted : 07 Sep 1970

Most Cited This Month

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error