an experiment was conducted to evaluate the effect of withdrawing vitamin and/or trace mineral premixes from grower and finisher diets of broilers. a 2×4 factorial arrangement of treatments, consisting of four diets and two-removal times (from 28 to 49, and from 35 to 49 days of age) was utilized. the four diets consisted of control, supplemented with vitamin (vit) and trace minerals (tm)(t1); ...

In 2012, a pertussis outbreak in Dallas County resulted in the deaths of 4 children (3, unvaccinated; 2, <60 days of age). Despite recommendations that include immunization of women preferably during the third trimester of pregnancy or postpartum, household contacts ("cocooning"), and infants as early as 42 days of age, challenges in pertussis prevention remain.

A crossbreeding experiment was carried out between two Egyptian strains of chickens namely Mandarah (MM) and ElSalam (SS). The two purebred strains and their reciprocal crosses (MS and SM) were used to estimate the effect of crossing on egg laying and egg quality parameters, direct additive and maternal additive effects as well as heterosis and direct heterosis percentages for studied traits. R...

AIM To determine an efficient vaccination schedule on the basis of the humoral immune response of cell culture adapted live classical swine fever virus (CSFV) vaccinated pigs and maternally derived antibody (MDA) in piglets of vaccinated sows. MATERIALS AND METHODS A cell culture adapted live CSFV vaccine was subjected to different vaccination schedule in the present study. Serum samples were...

The possibility of including SUB-PRO probiotic instead Maxus G feed antibiotic in the diet broiler chickens Ross 308 cross was studied to obtain products free drugs for antimicrobial resistance usage. dynamics live weight and carcass cockerels at 1-, 21-, 28-, 34-, 38- 42-days old determined. males control group (group 1) reached 2619 ± 44.9, experimental - 2739 46.2 or more by 4.38%, P?0.05 42...

Two replications of a complete diallel cross experiment were performed among four partially inbred lines of mice. These inbred lines originated from a random-bred ICR strain and were produced by 12 generations of full sibbing (F congruent to 92%). Individual body weight was recorded for each animal at 12, 21, 42 and 56 days of age. Body weight gain traits were examined for intervals 12-21, 21-4...

This study was designed to investigate the effects of the interaction among genetic group, sex and age on the frequencies and cross-sectional areas of myofiber types in rabbits. A total of 48 straightbred and crossbred Botucatu rabbits, males and females, were involved in a split plot design with a 2 × 2 (genetic groups × genders) factorial arrangement. Young rabbits were weaned at 35 days of a...