Theses and Dissertations

Issuing Body

Mississippi State University


Kiess, Aaron S.

Committee Member

McDaniel, Christopher D.

Committee Member

Peebles, E. David

Date of Degree


Document Type

Graduate Thesis - Open Access


Agricultural Science

Degree Name

Master of Science


College of Agriculture and Life Sciences


Department of Poultry Science


Pathogenic and non-pathogenic bacteria that are commonly associated with Poultry include: Salmonella, E. coli, Campylobacter, Clostridium, Lactobacillus, and Bifidobacterium. These bacteria are often transmitted to the bird from the environment and sometimes to the offspring which may affect bird performance and health. Therefore, the objective of our first experiment was to determine if rooster semen exposed to these bacteria had an effect on sperm motility. Our results indicated that all 6 bacteria lowered sperm motility but the 2 non-pathogenic bacteria, eliminated sperm motility immediately after exposure. These results led to the second experiment which was to determine if semen exposed to different concentrations of Lactobacillus (non-pathogenic bacteria) affected overall hen fertility. The results of the second experiment indicated that hens inseminated with semen exposed to a high dose of Lactobacillus produced infertile eggs. In conclusion, pathogenic and non-pathogenic bacteria affect male fertility and overall fertility leading to reduced bird performance.