fungal infection of uterine of dairy cattle have not been received much more attention. the aim of this study was: to investigate the uterine mycoflora of dairy cows with reproductive disorders or healthy. uterine sampling of 112 holstein dairy cows included 70 cows with reproductive disorders and 42 healthy cows were collected directly. samples were cultured in sabouraud glucose agar at 28°c f...

In pasture-based seasonal calving systems, failure to become pregnant during the breeding season results in important economic losses as maximum profit is attained by minimising costs and increasing the proportion of grass in the diet of the lactating dairy cow. In the United States, dairy producers primarily strive to maximise production potential but are becoming increasingly aware of the eco...

Productive and reproductive traits have great importance in international dairy cattle breeding objectives. Production, reproduction (days open and calving interval) and pedigree data of Iranian Holstein dairy cattles were collected between 2002 and 2012 from 47 herds in Isfahan province. The data set consisted of 30179 records from 18837 registered IranianHolstein dairy cattles. Single trait r...

Economic values of milk volume (VOL), fat yield (FYLD), protein yield (PYLD), live weight (LWT), longevity (LON), calving interval (CIV) and somatic cell score (SCS) were derived for Holstein and Jersey cattle, based on milk payment systems of four major milk buyers in South Africa. The economic value of somatic cell score was calculated for only two of the payment systems. A bio-economic model...

This study was designed to determine a reference range of haptoglobin (Hp) in Iranian Holstein cattle of different ages and of both sexes, and to evaluate Hp as marker in some inflammatory diseases in Shiraz, a tropical area in southern Iran. Blood samples were collected from the coccygeal vein of 50 clinically healthy cattle and 36 cows with various inflammatory diseases (acute diffuse traumat...

INTRODUCTION Bovine immunodeficiency virus (BIV) and bovine leukemia virus (BLV) have worldwide distributions, but their prevalences in Iran are unknown. We investigated the presence of infections in Iranian Holstein cattle and determined changes in hematological values for infected animals. METHODOLOGY Nested PCR was used on blood samples from 143 animals Holstein cattle to detect proviral B...

A total of 648 purebred Holstein and 319 backcross Holstein × Jersey dairy cattle were compared for production, reproduction, health, linear type, and growth traits. Animals were born between 2003 and 2009 and were housed in the University of Wisconsin-Madison Integrated Dairy Facility. All animals had Holstein dams; lactating dams were mated to unproven Holstein sires to produce purebred (cont...

The authors inadvertently omitted funding information for this study. following text should be included in the Acknowledgments section: This work was supported by a grant from China Agriculture Research System (CARS-36), Program Changjiang Scholar and Innovation Team University (IRT_15R62), National Agricultural Genetic Improvement (2130135), Beijing Sciences Technology (D171100002417001), Ning...

Problem statement: Imported Holstein Friesian dairy cattle are exposed to hot arid climate in feedlot management in Kuwait. Desert climate is extreme reaching high 45-50°C in summer and low -4oC in winter at day and night respectively. High calf mortality, poor reproduction and milk yields were main constraints to viable dairying. The objectives of this study were to assess the magnitude of cal...

bovine viral diarrhea virus (bvdv) is a pestivirus of the flaviviviridaefamily that infects cattle, and its widespread distribution can cause substantial economic losses worldwide. the aims of this study were: (1) to estimate the prevalence of animals persistently infected (pi) with bvdv in industrial dairy cattle herds in suburb of mashhad- iran; and (2) to compare the occurrence of persistent...