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Theses/Dissertations

2013

Biology

Carroll College

West Nile virus

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Full-Text Articles in Life Sciences

Blood-Feeding Behavior Of Culex Tarsalis At Medicine Lake National Wildlife Refuge, Montana, Maxwell Bernt Apr 2013

Blood-Feeding Behavior Of Culex Tarsalis At Medicine Lake National Wildlife Refuge, Montana, Maxwell Bernt

Life and Environmental Sciences Undergraduate Theses

It is known that the ornithophillic mosquito, Culex tarsalis is the primary vector of West Nile Virus (WNV) in Montana. An analysis of this mosquito’s blood feeding behavior allows researchers to identify preferred hosts and to determine the rate at which this species parasitizes humans and other tangential hosts. Additionally, an understanding of blood feeding behavior allows an assessment of WNV risk based on the regional availability of preferred hosts and the hosts’ competency in viral amplification. In this study, blood engorged Cx. tarsalis were captured at Medicine Lake National Wildlife Refuge over three one-week periods spaced through early ...


Infection Rate Of West Nile Virus In Culex Tarsalis At Medicine Lake Wildlife Refuge And Ninepipe Wildlife Refuge In 2012, Graham Unis Apr 2013

Infection Rate Of West Nile Virus In Culex Tarsalis At Medicine Lake Wildlife Refuge And Ninepipe Wildlife Refuge In 2012, Graham Unis

Life and Environmental Sciences Undergraduate Theses

This study focused on the infection rate of West Nile virus of Culex tarsalis populations at Medicine Lake Wildlife Refuge (MLWR) and Ninepipe Wildlife Refuge (NWR). My research was done in order to determine if there was a statistical difference in the infection rate between NWR and MLWR via a bias corrected ML estimate. These locations were chosen because they were ideal locations for West Nile virus (WNV) and in the case of MLWR, past positive C. tarsalis pools. My study involved trapping mosquitoes, sorting out the C. tarsalis, and isolating WNV from mosquito homogenate. Once C. tarsalis had been ...


Microsatellite Analysis Of Gene Flow Between Culex Tarsalis Populations Connected By Irrigation In Yellowstone County, Montana, Mattie Casey Apr 2013

Microsatellite Analysis Of Gene Flow Between Culex Tarsalis Populations Connected By Irrigation In Yellowstone County, Montana, Mattie Casey

Life and Environmental Sciences Undergraduate Theses

The purpose of this study was to determine whether population connectivity by irrigation enhances gene flow between Culex tarsalis populations in the state of Montana. Four populations of Cx. tarsalis were collected along the Yellowstone and Bighorn rivers and allele frequencies obtained from PCR amplification of four microsatellite loci, visualized using the QIAxcel Advanced System, were used to assess the genetic structure of the populations. Results of the four loci indicate lower pairwise FST values between only two of three populations connected through waterway, which suggests a disparity in the data. If the genetic similarity between these populations reflects rates ...