BACKGROUND: The application of medicinal herbs with high anti-oxidant properties could reduce the detrimental effects of oxidative stress and free radicals under heat stress and improve the performance of broilers. OBJECTIVES: The effects of rosemary powder and extract on growth performance, carcass characteristics and blood parameters of broilers were evaluated under heat stress. METHODS: For studying the effect of experimental treatments including control, different levels of rosemary powder (5, 10 and 15 g/kg), rosemary extract (3.5,7 and 10.5 g/kg) and Vit-Asp (1 g/L) on growth performance (feed intake, body weight and feed conversion ratio), carcass characteristics and blood parameters (cholesterol, triglyceride, hematocrit, glucose and heterophil to lymphocyte ratio), 160 one-day old chicks (Ross male-308) were used applying a randomized complete block design with 8 treatments, 4 replicates and 5 chicks per replicate during a 42-day period. Heat stress schedule was 32±2ºC as cyclic from 10.00 AM to 6.00 PM. RESULTS: Rosemary had significant effects on feed intake and final live weight of chicks (p<0.05) but not on feed conversion ratio (p>0.05). Significant effects from rosemary on glucose and heterophil to lymphocyte ratio were found (p<0.05). The effects of rosemary on carcass characteristics, cholesterol, triglyceride and hematocrit were not significant (p>0.05). CONCLUSIONS: In general, inclusion of rosemary in broilers diet under heat stress improved the performance because of anti-oxidant effects.Keyword: Rosemary, performance, blood parameters, heat stress, broilers

BACKGROUND: Salmonella Enteritidis in poultry is one of the main causes of illness that can be controlled effectively by some plant compounds, antibiotics and probiotics. OBJECTIVES: This study compares the effect of rosemary, thyme, propolis, antibiotic and probiotic on the immune system and blood parameters of broilers challenged with Salmonella Enteritidis.  Methods: Four hundred and twenty 1-day- old male broiler chicks Cobb strain were divided into seven groups: including rosemary ethanol extract, ethanol extract of propolis, ethanol extract of thyme, and probiotics, virginiamycin (10%) and positive and negative controls, and were reared for 6 weeks. At the end of experiment chickens were sampled and slaughtered. RESULTS: The results showed that plant extracts with probiotics can improve the immune system, reduce serum lipids, reduce harmful bacteria such as Salmonella and E.coli and increase the beneficial bacteria such as lactic acid bacteria. CONCLUSIONS: This study showed that the herbal extracts and probiotics can be used as an alternative to antibiotics in broiler diets.

Rosmarinus officinalis, L. (Lamiaceae) offers medicinal potential against hepatotoxicity and nephrotoxicity Due to its antioxidant and anti-toxicity properties. The objective, of this research is to explore into the ethanol extract of Rosmarinus officianalis leaves and its efficacy against&nbsp; cypremethrin induce toxicity in The liver and&nbsp; The kidney of male rabbits. Forty male rabbits were employed in this experience, group one ( without exposure); rabbits received corn oil ( 1 ml) group two; rabbits oral exposure to cypermethrin with dose (66.5 mg/kg/b.w ( 1/10 of LD50) dissolved in corn oil , group three( protective group) received rosemary extract with dose 100mg/kg plus cypermethrine with dose 66.5 mg/kg/b.w., group four received rosemary extract with dose 200mg/kg plus cypermethrine with dose 66.5 mg/kg/b.w. the above doses once per day for 6 weeks respectively.In accordance with the current study's findings, liver enzyme levels significantly increased. ALT,ALSand ALP),Lipid profile (TC,TG.LDL-cand VLDL_c) and&nbsp; kidney function tests&nbsp; (urea, a creatinine, uric acid and blood urea, nitrogen concentrations ) but significant decrease in (Total protein and HDL_ c value&nbsp; ) in the treated group with cypermethrin , .whereas the animals received rosemary extract in both dose plus cypermethrin produced notable decrease in the&nbsp; levels of the vital parameters of the liver and kidneys are with&nbsp; the normal level. : the current study displayed that the Rosmarinus officinalis has antitoxicity activities as seen via decreasing liver enzymes, lipid profile and kidney function tests&nbsp;&nbsp; is accompanied by elevated the levels of&nbsp; total protein .&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;

The aim of the study to evaluate the enhanced effect of aqueous extract ofrosemary on testis tissue in male rats after inducing hyperthyroidism by L&ndash;thyroxin andcompare with propylthiouracil effect. The animals (32 male rats) were divided into twogroups. The first group was a control group consists of 8 male rats that were treated withdistilled water for 12 days and the rest of the animals induced with hyperthyroidism bylevothyroxine 0.5 mg / kg subcutaneously for 12 days. After the induction, the animalswere divided into four groups each consists of eight male rats. The first group was thecontrol group and they were treated with distilled water for another 12 days, the secondgroup included male rats induced hyperthyroidism were treated with distilled water for 12days orally, while the third group included male rats induced hyperthyroidism that weretreated with propylthiouracil at a dose of 10 mg / kg for 12 days orally, and the fourthgroup included male rats induced hyperthyroidism that were treated with rosemary extractat a dose of 12 mg / kg for 10 days, orally. The results showed that rosemary extract led tocomplete healing of testicular tissue, unlike propylthiouracil.