The long-term objective of this project is to gain a sufficient knowledge of the ecology of arboviruses for development of effective strategies to control those arboviral diseases that are of public health and veterinary importance in North America. Six areas of research are proposed currently to attain this objective: laboratory studies to elucidate instrinsic factors and mechanisms that control the competence of selected mosquito species to vector arboviruses that cause epidemics; controlled laboratory studies to determine the effect of temperature on the extrinsic incubation of arboviruses in their mosquito vectors and parallel field studies to evaluate the role of temperature as an environmental factor that influences the seasonal and yearly patterns of western equine encephalomyelitis and St. Louis encephalitis viruses; in-depth field studies on the ecology of WEE virus and its vectors in rural agricultural and riparian/marshland habitats in Kern County, California to identify basic foci of viral transmission and patterns of dissemination from such foci; study of alternative hypotheses to explain the overwintering of 6 enzootic arboviruses in their arthropod vectors and vertebrate hosts in Kern County, California; to develop statistical-epidemiological models that will integrate the variables that control mosquito population growth and associated arboviral transmission cycles including the impact of alternative strategies for control of vector populations; and to summarize research accomplishments during the past 40 years in the form of a monograph on """"""""The Epidemiology of the Arthropod-borne Viruses in California, 1943-1984.""""""""

Agency
National Institute of Health (NIH)
Institute
National Institute of Allergy and Infectious Diseases (NIAID)
Type
Unknown (R22)
Project #
2R22AI003028-27
Application #
3444412
Study Section
Tropical Medicine and Parasitology Study Section (TMP)
Project Start
1974-09-01
Project End
1990-08-31
Budget Start
1985-09-01
Budget End
1986-08-31
Support Year
27
Fiscal Year
1985
Total Cost
Indirect Cost
Name
University of California Berkeley
Department
Type
Schools of Public Health
DUNS #
094878337
City
Berkeley
State
CA
Country
United States
Zip Code
94704
Kramer, L D; Hardy, J L; Presser, S B (1998) Characterization of modulation of western equine encephalomyelitis virus by Culex tarsalis (Diptera: Culicidae) maintained at 32 degrees C following parenteral infection. J Med Entomol 35:289-95
Reisen, W K; Lothrop, H D; Presser, S B et al. (1997) Landscape ecology of arboviruses in southeastern California: temporal and spatial patterns of enzootic activity in Imperial Valley, 1991-1994. J Med Entomol 34:179-88
Reisen, W K; Hardy, J L; Presser, S B (1997) Effects of water quality on the vector competence of Culex tarsalis (Diptera: Culicidae) for western equine encephalomyelitis (Togaviridae) and St. Louis encephalitis (Flaviviridae) viruses. J Med Entomol 34:631-43
Fulhorst, C F; Bowen, M D; Hardy, J L et al. (1996) Geographic distribution and serologic and genomic characterization of Morro Bay virus, a newly recognized bunyavirus. Am J Trop Med Hyg 54:563-9
Fulhorst, C F; Hardy, J L; Eldridge, B F et al. (1996) Ecology of Jamestown Canyon virus (Bunyaviridae: California serogroup) in coastal California. Am J Trop Med Hyg 55:185-9
Reisen, W K; Lothrop, H D; Hardy, J L (1995) Bionomics of Culex tarsalis (Diptera: Culicidae) in relation to arbovirus transmission in southeastern California. J Med Entomol 32:316-27
Eisenberg, J N; Reisen, W K; Spear, R C (1995) Dynamic model comparing the bionomics of two isolated Culex tarsalis (Diptera: Culicidae) populations: model development. J Med Entomol 32:83-97
Reisen, W K; Smith, P T; Lothrop, H D (1995) Short-term reproductive diapause by Culex tarsalis (Diptera: Culicidae) in the Coachella Valley of California. J Med Entomol 32:654-62
Reisen, W K; Hardy, J L; Lothrop, H D (1995) Landscape ecology of arboviruses in southern California: patterns in the epizootic dissemination of western equine encephalomyelitis and St. Louis encephalitis viruses in Coachella Valley, 1991-1992. J Med Entomol 32:267-75
Reisen, W K (1995) Effect of temperature on Culex tarsalis (Diptera: Culicidae) from the Coachella and San Joaquin Valleys of California. J Med Entomol 32:636-45

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