Plasma samples from suckling beef calves, transport-stressed weaned calves, 500 kg feedlot cattle, and lactating dairy cows were analyzed for vitamin C, folic acid, pantothenic acid, and vitamin B12' Plasma from stressed calves also was analyzed for vitamin B6' Differences in plasma levels were detected between groups. Plasma vitamin C was highest in suckling calves, but similar for stressed ca...

Prophylactic and therapeutic antimicrobial use in food animals is questioned because of the potential for development of resistant bacteria and future inability to use some antimicrobials for human or animal disease. The objectives of this study were to determine the effect of raising preweaned dairy calves without antimicrobials in the milk and minimizing therapeutic antimicrobial treatment on...

1. An in vitro preparation was used to measure rates of oxygen consumption, Na+, K+-ATPase-dependent respiration. [14C]phenylalanine incorporation and tyrosine release of skeletal (sternomandibularis) muscle from 10-21-d-old (three) and 7-month dairy (three) calves and control (CDM; four) and extreme double-muscled (EDM; two) calves. 2. Rates of oxygen consumption was greatest (P less than 0.00...

Podhorský A., A. Pechová, r. dvořák, L. Pavlata: Metabolic Disorders in Dairy Calves in Postpartum Period. Acta vet. Brno 2007, 76: s45-s53. the aim of this study was, in terms of analysis of causes of disorders in calves on dairy farms, to evaluate occurrence of metabolic disorders in their postnatal period. In 23 agricultural farms (14 farms with the incidence of clinical forms of disease in ...

iv General Preface v Acknowledgements vi List of Tables xi List of Figures xiii List of Abbreviations xiv List of Publications xv Chapter one: Introduction 1 Chapter two: Neonatal calf diarrhoea: a literature overview 4 2.1. The principles of rearing of newborn dairy calves, with particular reference to the situation in New Zealand 4 2.2. The economic impact of neonatal calf diarrhoea 8 2.3. Ae...

BACKGROUND Bovine respiratory disease (BRD) is 1 of the 2 most important causes of morbidity and mortality in dairy calves. Surprisingly, field data are scant concerning the prevalence of respiratory pathogens involved in BRD in preweaned dairy calves, especially in small herds. OBJECTIVES To identify the main respiratory pathogens isolated from calves in Québec dairy herds with a high incide...

This study used realistic evaluation to determine how, and in which circumstances, providing dairy farmers with benchmarked data on their calves can motivate improved colostrum management practices. Dairy from British Columbia, Canada were recruited through 2 veterinary clinics that offered benchmarking of calf as part services. For approximately 8 wk, blood samples collected newborn evaluate s...

Accepted: 27/12/2015 Abstract The present investigation was conducted on sixty commercial dairy farms in Guntur and Warangal districts of Andhra Pradesh by selecting twenty dairy farmers each from small, medium and large sized dairy farms to study the calf mortality and managemental practices that are being followed by the farmers. The results indicated that high incidence of calf mortality was...

Faecal samples from 291 dairy calves from 10 dairy herds in Kerman were examined to investigate theprevalence of Cryptosporidium infection. Cryptosporidium spp. oocysts were identified by using themodified Ziehl-Neelsen staining technique in 63 (21.65%) calves. Calves were grouped according to theirage as follows: