Heat stress has negative effects on biological defense mechanisms such as the immune response in chickens, and organs of the immune system, such as the spleen, are atrophied by heat stress in broiler chickens. In order to assess heat stress-induced functional changes of immune mechanisms in the spleen of broiler chickens, expression of genes encoding splenic cytokines (Th1 type, Th2 type, and p...

this experiment was conducted to investigate the effects of olive leaf (ol) on immune response and some blood metabolites of broiler chickens. a total of 400 one-day-old broiler chicks (male and female) were randomly assigned to 5 experimental treatments with 4 replicates of 20 birds each. birds of different treatments were given diets containing 0, 0.25, 0.5, 0.75 and 1% ol powder from 14 to 4...

Background: Some medicinal plants can stimulate growth in poultry. Objective: To compare the effects of dietary addition virginiamycin antibiotic and galbanum plant (Ferula gummosa) on performance, carcass characteristics, immune system, blood factors broiler chickens. Methods: A total 250 one-day-old male Ross 308 chickens were randomly assigned to five treatments with replicates (10 birds per...

this study was conducted to investigate the effects of l-carnitine and different levels of animal fat on performance, carcass characteristics and some blood parameters of broiler chickens. two hundred one-day old male broiler chicks were allotted to5 treatments in 4 replicates and 10 birds in each replicate. dietary treatments consisted of: 1) diet with 5% vegetable oil (t1), 2) diet with 5% ve...

this experiment was conducted to evaluate the effect of different levels of crude protein and threonine on performance, carcass characteristics and immune system of broiler chickens during starter (7-24) and grower (25-42) periods. a total of 288 male broiler chicks of ross 308 strain were used in a completely randomized design with factorial arrangement (2×4) with three replicates in each trea...

although preliminary studies have shown the anticoccidial effects of artemisinin in broiler chickens, there are no proofs of its pharmacokinetics. the objective of this study was to determine the serum concentration of artemisinin after single and multiple oral administration in broiler chickens. a total of 390 one-day-old healthy ross 308 chickens were divided randomly into two groups. in the ...

Zataria multiflora essential oil possesses immunomodulatory effects and the present study investigatesits effect on immune responses to live Newcastle disease (ND) vaccines and faecal shedding period ofvaccine strain virus in chickens. One hundred and eighty chickens from both sexes were divided into 6 equalgroups: group 1: unvaccinated, group 2: vaccinated (B1 vaccine followed by La Sota 10 da...

a semi-field study was carried out to evaluate the effect of two medicinal herbs, individually and in combination, on growth performance, carcass traits, nutrient digestibility and immune response of broiler chickens.  a total of 384 one-day-old straight-run arbor acres broiler chickens were allocated into 24 floor pens prepared in a commercial broiler house. pen-groups were fed one of the foll...