A cross-sectional study was conducted to determine prevalence and risk factors of cryptosporidiosis in bovine from two contrasting production system in and around Tanga municipality between May 2003 and January 2004. The study populations comprised 117 calves aged ≤3 months, randomly selected from 44 smallholders dairy and traditional managed herds, respectively. Individual calf and herd-level ...

This study was conducted to estimate the additive genetic components of calf mortality in the first month of age, calving difficulty, and birth weight in Holstein dairy cows in the central regions of Iran. The records comprised 61,200 calves born between 1990 and 2011 from 60 dairy herds. Different threshold-linear models in three groups of univariate, bivariate, and multivariate models were us...

Between February 1995 and June 1999, specimens from seven aborted bison (Bison bison) fetuses or stillborn calves and their placentas, two additional placentas, three dead neonates, one 2-wk-old calf, and 35 juvenile and adult female bison from Yellowstone National Park (USA) were submitted for bacteriologic and histopathologic examination. One adult animal with a retained placenta had recently...

In beef cattle breeding, unlike dairy farming, the only product is a calf. Therefore, industry's competitiveness directly depends on annual retention from each cow and heifer calf, preservation of calves, high growth energy young animal throughout rearing period. These indicators are influenced by many factors, one which breeding technology. The colostrum period most critical; newborn calves th...

Livestock production, and more particularly ruminants, is criticized for its low conversion efficiency of natural resources into edible food. The objectives this paper are to propose an evaluation the contribution food security different European cattle farms through three criteria: 1) production assessed by amount human-edible protein (HEP) energy (HEE) produced at farm level, 2) feed-food com...