Juniper Publishers Journal of Dairy and Veterinary Sciences

  Journal of Dairy & Veterinary Sciences - Juniper Publishers Introduction Mastitis caused by Coagulase-negative Staphylococci (CNS) usually remains subclinical or mildly clinical [1], however it was reported that CNS mastitis could be aggravated to severe clinical cases [2], but most CNS mastitis cases are chronic [3] based on their intramammary persistence for lactation milk exceeding periods, even extended to the upcoming ones [4]. CNS mastitis is a hidden but serious threat to dairy herd including further horizontal transmission to lactating cows and vertical to suckling calves because of environmental origin of most CNS and hidden subclinical nature [5]. CNS mastitis hazards aren’t exclusive to the dairy herds, but also extended to public health due to possible horizontal transmission of resistance genes (Soares et al., 2012) to other human pathogens or direct transmission to humans because of shared zoonotic virulent CNS species between animal and humans [6]. Pathogenicity of

  Journal of Dairy & Veterinary Sciences - Juniper Publishers Abstract The availability of indicators that would help to avoid the overvaluation of one of the characteristics involved in the assessment of a good dairy cow over others that are important as well would also allow identifying the most adapted biotypes to the different environments existing at the place of the evaluation This article aims to discuss the need to use several productive and reproductive indicators when measuring the biological efficiency of a dairy cow in grazing systems. It was used retrospective data corresponding to the lactations of 300 primiparous and multiparous cows of the Holstein breed - American-Canadian biotype, along with records of their entire productive life, from their incorporation into the system until their sale or death. The animals were divided into two categories: pure cows (PC, n = 120) and cows in the breeding record (CBR, n = 180). It is observed that there are two different strate

  Journal of Dairy & Veterinary Sciences - Juniper Publishers Abstract The environment of the Bahía Blanca estuary is considered a hot spot in terms of pollution. Bioindicators should have the ability to react relatively fast to certain pollutants and environmental disturbances. Therefore, an exploratory study was carried out determining and quantifying the concentrations of cadmium (Cd), chromium (Cr), copper (Cu), lead (Pb) and zinc (Zn) in the muscle and liver of Mustelus schmitti narrownose smooth-hound and were compared with the values obtained from their respective helminth assemblies. In most of the fishes analyzed, the concentration of heavy metals was higher in the infra communities of cestodes compared to the host. Our results position the cestodes as efficient sentinel species of pollution by bioaccumulating higher concentrations of heavy metals than the host tissues, thus behaving in excellent early warnings of environmental pollution, more real than quantifications in

  Journal of Dairy & Veterinary Sciences - Juniper Publishers Abstract Milk composition and production are the interaction of many elements within the cow and her external environment. Composition of milk influenced by many factors such as genetic and breeds differences, stage of location, milking interval, seasonal variation, disease and nutrition. Nutrition is the major factor on both milk yield and composition. The three factors: Genetic makeup, nutrition and management decide the productivity of dairy cows. Improvement of genetic make up only contributes up to 30% to production, while the 70% is dependent on nutrition and management. Unfortunately, indigenous of tropical dairies are low milk producers because of the shortage of nutrition. Poor nutritive values of feeds lower the production capacity and fertility potential of dairies. If fed well, with supplementary feeds and under good management, more milk could be produced from them. So, supplementary feed with optimum dietar