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Full-Text Articles in Life Sciences

Impact Of Reducing Ammonia Concentration By Ozone Technology And Its Potential Improvement On Broiler Performance, Odilpio Quintana Ortega Dec 2023

Impact Of Reducing Ammonia Concentration By Ozone Technology And Its Potential Improvement On Broiler Performance, Odilpio Quintana Ortega

Graduate Theses and Dissertations

The employment of ozone in livestock production as a means of mitigating ammonia is used for enhancing air quality within animal confinement facilities, such as swine or poultry barns. Ammonia is a byproduct of animal excrement. Elevated ammonia concentrations can adversely affect the well-being of both animals and humans. The aim of this thesis was to investigate the effects of Ozone Technology Machine Unit (OTMU) utilization in poultry barns regarding ammonia concentration and its potential benefit in terms of broilers performance and welfare. In recent years, there has been a significant boom in technological advances. New devices that help mitigate …


In Vitro And In Vivo Evaluation Of Antimicrobial Activity, Oocyst Sporulation Rate, Oocyst Integrity And Oocyst Infectivity In Eimeria Maxima M6 Oocyst Suspensions Treated With Chlorhexidine Salts In Comparison With Potassium Dichromate, Lauren Laverty Dec 2023

In Vitro And In Vivo Evaluation Of Antimicrobial Activity, Oocyst Sporulation Rate, Oocyst Integrity And Oocyst Infectivity In Eimeria Maxima M6 Oocyst Suspensions Treated With Chlorhexidine Salts In Comparison With Potassium Dichromate, Lauren Laverty

Graduate Theses and Dissertations

Eimeria species oocysts cause coccidiosis, one of the costliest diseases in the poultry industry. Coccidiosis infections cause significant economic losses due to reduced performance in chickens and turkeys. The objective of this thesis was to determine fecal bacterial recovery from chlorhexidine (CHX) salt suspensions containing Eimeria maxima M6 oocysts and evaluate the effect of CHX salts on oocysts during long-term cold storage. For bacterial recovery experiments, CHX digluconate and CHX gluconate were tested at different concentrations on poultry fecal slurries during oocyst shedding. Eimeria maxima M6 oocysts were evaluated in CHX salt suspensions to test the effect on oocyst degradation …


Assessment Of Dietary Energy And Amino Acid Diet Formulation In The Modern Broilers, Matheus Freitas Costa Dec 2023

Assessment Of Dietary Energy And Amino Acid Diet Formulation In The Modern Broilers, Matheus Freitas Costa

Graduate Theses and Dissertations

As a result of the advancement of genetics, understanding broiler requirements for dietary energy and amino acids is essential for improving live performance and carcass characteristics. The energy system used to formulate diets in poultry is based on metabolizable energy (ME); this equation can be described as the total amount of energy in the feed minus gases and feces. However, the net energy (NE) system may be the best depiction of the energy utilized by birds for production and maintenance purposes once the heat increment (HI) is measured. Thus, a series of studies were conducted to establish the responsiveness of …


Evaluation Of The Effect Of Enterococcus Cecorum Exposure During Late Embryogenesis On Systemic Disease And Early Performance In Broiler Chickens, Marcela Arango May 2023

Evaluation Of The Effect Of Enterococcus Cecorum Exposure During Late Embryogenesis On Systemic Disease And Early Performance In Broiler Chickens, Marcela Arango

Graduate Theses and Dissertations

The objective of this thesis was to investigate the effects of Enterococcus cecorum (EC) administration into the amnion at day 18 of embryogenesis on performance and septicemia development in broiler chickens. Chapter I consists of a brief overview of the thesis. Chapter II provides a literature review on EC-related disease in broiler chickens and methods to isolate, detect, and differentiate between commensal and pathogenic strains of EC. Chapter III consists of a study conducted to determine if different EC strains isolated from field cases that exhibited septicemia and high mortality impacted hatchability, livability, organ colonization, and early performance in broiler …


Fulfilling Koch’S Postulates And Evaluation Of Different Administration Routes In Poults Challenged With Streptococcus Gallolyticus, Latasha Gray May 2023

Fulfilling Koch’S Postulates And Evaluation Of Different Administration Routes In Poults Challenged With Streptococcus Gallolyticus, Latasha Gray

Graduate Theses and Dissertations

Streptococcus gallolyticus (SG) is a Gram-positive found as commensal gut flora in animals and humans. SG has been associated with acute mortality in poults 2 to 3 weeks of age, with lesions mainly consisting of splenomegaly, hepatomegaly, and pericarditis. The objective of this thesis was to reproduce disease in poults caused by SG recovered from clinical field isolates and evaluate different routes of administration. Three field isolates from geographically disparate areas in Arkansas and Missouri were used for the experiments contained in this thesis. Antibiotic sensitives of the three field isolates revealed sensitivity to penicillin as well as a wide …


Approaches For Mitigating Woody Breast In Commercial Broilers Through Nutritional And Management Strategies, Clay Maynard May 2023

Approaches For Mitigating Woody Breast In Commercial Broilers Through Nutritional And Management Strategies, Clay Maynard

Graduate Theses and Dissertations

Breast myopathies have caused significant economic losses to the poultry industry over the last decade. The induction of woody breast (WB), white striping (WS), and spaghetti meat (SM) have caused textural issues, functional issues, and a decline in consumer acceptance. Of these three myopathies, WB causes the most pronounced effects on product quality and reduces functional use. Woody breast is also commonly associated with expansive breast meat growth/high performing broilers. However, progress in reducing these myopathies has been limited without hindering other aspects of poultry rearing. Generally, production performance reduces as myopathy occurrence or incidence reduces. This response is primarily …