Background: Dicrocoeliasis is caused by digenean trematode of Dicrocoelium dendriticum, small liver fluke, a hepatic parasitic disease in ruminants and human, throughout the world. D. dendriticum infection has been considered to be correlated with the economic and veterinary aspects. Objectives: The aim of the present study was to determine the prevalence and intensity of infection with D. dend...

The present study was designed to investigate the prevalence of Eimeria spp. in Zabol, east of Iran. The samples were examined microscopically for the presence of oocysts from February 2015 to December 2016. Out of 196 cattle, 124 (63.26%) were identified to be positive for Eimeria species. Eight species of Eimeria were found as follows: E. bovis (42.54%), E. zuernii (38.67%), E. subspherica (5...

The study objective was to determine the effects of two treatment regimens on quantities of ceftiofur and tetracycline resistance genes in feedlot cattle. The two regimens were ceftiofur crystalline-free acid (CCFA) administered to either one or all steers within a pen and subsequent feeding/not feeding of therapeutic doses of chlortetracycline. A 26-day randomized controlled field trial was co...

In the present study the efficacy Botulism vaccine (formalinised aluminum hydroxide gel adsorbed toxoid of Clostridium botulinum types C and D) was evaluated in four Danish dairy cows under field conditions. Other four dairy herds were unvaccinated. Blood serum of all animals was analyzed for specific C. botulinum types A, B, C, D and E antibodies using a developed ELISA. Feces of all animals w...

In the United States, the Center for Disease Control and Prevention (CDC) estimates that the number of foodborne illnesses annually is approximately 76 million cases, resulting in 325,000 hospitalizations and 5,000 deaths. Of those, almost 14 million cases of foodborne illness, 60,854 hospitalizations, and 1,800 deaths are caused by known foodborne pathogens (Mead et al., 1999). The cost of hum...

We compared fecal samples with samples collected with rectoanal mucosa swabs (RAMS) to determine the prevalence of Escherichia coli O157 in feedlot cattle (n = 747). Escherichia coli O157 was detected in 9.5% of samples collected with RAMS and 4.7% of samples tested by fecal culture. Pulsed-field gel electrophoresis analysis of isolates suggested that the strains colonizing the rectoanal juncti...

Escherichia coli O157 is an important foodborne pathogen affecting human health and the beef cattle industry. Contamination of carcasses at slaughter is correlated to the prevalence of E. coli O157 in cattle feces. Many associations have been made between dietary factors and E. coli O157 prevalence in cattle feces. Preharvest interventions, such as diet management, could reduce the fecal preval...

The reduction of foodborne pathogens in cattle destined for human consumption will require knowledge of the factors that impact the carriage and shedding of these organisms. The objective of this work was to investigate the effects of heat and handling stress levels on the fecal shedding of Escherichia coli O157:H7 and generic E. coli by feedlot cattle. In year 1, 128 feedlot heifers were evalu...

BACKGROUND Giardia duodenalis is a ubiquitous protozoan parasite that has emerged as a significant opportunistic human pathogen. G. duodenalis may have a deleterious effect on animal growth and performance, therefore its potential as a production limiting organism should not be discounted. We therefore undertook this study to determine management and environmental factors in feedlots that influ...

We designed polymearse chain reaction (PCR) primers to distinguish Campylobacter jejuni from Campylobacter coli and to differentiate Arcobacter from other species of Campylobacter. We applied these PCR methods to estimate their prevalence in feces of healthy cattle and hogs and to identify risk factors for infection. For cattle, C. jejuni (23%), Arcobacter (11%), and C. coli (1.57%) were detect...