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Biology

Honors Theses

Survival

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Full-Text Articles in Life Sciences

The Incorporation Of Lipids Into The Cellular Membrane Of Salmonella, Betsy H. Redfern May 2019

The Incorporation Of Lipids Into The Cellular Membrane Of Salmonella, Betsy H. Redfern

Honors Theses

Salmonella is a gram negative, facultative anaerobic food borne pathogen and is the leading cause of deaths related to food borne illnesses. In order to establish an infection successfully, Salmonella must be able to survive in the presence of various stressors that it encounters, namely changes in pH, oxygen availability, osmolarity and bile. Previous research has shown that exposure to bile causes a shift in fatty acid composition in the cell membrane of the enteric bacterium Enterococcus faecalis. Thus, this led to the hypothesis that Salmonella incorporates fatty acids into its cellular membrane following exposure to bile and thereby protects …


The Effects Of Soil Ph And Texture On The Molting Success And Survival Of Blacklegged Ticks (Ixodes Scapularis): A Field Experiment, Colleen Cook Jun 2014

The Effects Of Soil Ph And Texture On The Molting Success And Survival Of Blacklegged Ticks (Ixodes Scapularis): A Field Experiment, Colleen Cook

Honors Theses

The blacklegged tick (Ixodes scapularis) is the primary vector of Borrelia burgdorferi, the causative agent of Lyme disease. When a tick is not questing or feeding, the majority of its life is spent within the soil. Abiotic factors within soil have been shown to affect tick molting and survival across all life stages. Soil pH, however, has not been heavily investigated. In this field study, I investigated the effects of soil pH and texture on engorged nymphal ticks. Two sites were chosen to encompass the extremes of soil pH in the region; the Albany Pine Bush in Albany, NY has …