Backgrounds, there are limited choice of analgesic agent in horse medicine, and mostly because of side effects usage of analgesics is contraindicated in horses. Objectives, introduction of compounds which have little side effects whith good analgesic affects. Methods, this study was undertakan in 6 healthy horses, in control group they received normal saline. In treatment group CRI of lidocaine and xylasine has been administered, and data was recorded at the beginning of infusion and 10, 20, 30, 40 and 50 minutes after starting the infusion at time 50 infusion was stopped and 15, 30 and 60 minutes after that data was recorded as well. Analgesic effect was evaluated by algometer. NIBP, Temperature, Heart rate, respiratory rate, sedation, intestinal sounds was evaluated at each time points. Results, 30 minutes after starting the infusion analgesic effect has started and there was significant difference between control and treatment group this effect last until the end of infusion and after the CRI this effect disappeared gradually. Conclusions, simultaneous infusion of xylasine and lidocanie has significant analgesic effect. But it needs more study in fields like laminitis cases to prove the efficacy of combination of xylazine and lidocaine.

Background: Candidiasis is a fungal infection that is often caused by Candida albicans (C. albicans) and in a few cases caused by other Candida species. Infection of gastrointestinal tracts including mouth, esophagus and stomach, as well as enteritis and diarrhea are the most common form of the disease in cattle. Clinical findings: In January 2015 reduction in milk production and severe watery diarrhea were observed in a dairy farm located in Varamin city Tehran, Iran. So that 57.1% of cows with high milk production efficiency and 40% of cows with low milk production efficiency involved severe watery diarrhea. Laboratory tests: in clinical examination of affected animals vital signs such as number of breathing, heart rate, as well as the quality and number of ruminal movements were quite normal. No unusual sings were seen in CBC pattern of affected animals. In stool samples of affected animals no viruses or bacteria were detected while specimens were positive for yeast contamination RapID commercial kits used to identify the genus and species of yeast and C. famata was diagnosed as the cause of diarrhea. Final evaluation: Reports of diarrhea caused by fungal pathogens in animals is very low and Candida species, especially C. albicans and C. glabrata are known as the main causes of fungal diarrhea in animals .This study is the first repot about occurrence of C. famata diarrhea in adult cattle. So that C.famata could be considered as one of the potential causes of diarrhea in cattle.

BACKGROUND: This study was conducted to evaluate the effect of melatonin on semen quality and quantity changes and increase of reproductive efficiency in Lori-Bakhtiari ram in the non-reproductive season. OBJECTIVES: The purpose of this study was to investigate the effect of melatonin on testicular size and semen qualitative and quantitative changes in the non-breeding season is Lori-Bakhtiari rams. METHODS: This study was designed to evaluate the effects of melatonin on the quantity and quality of semen and testicular diameter in 8 Lori- Bakhtiari rams (4 control rams and 4 treatment rams) for 10 weeks during spring 2013. Each ram in the treatment group was received three tablets of 18 mg implantable melatonin subcutaneously at the base of ear after 5 weeks from the start of the trial. RESULTS: Semen parameters and testicular diameter measurements were evaluated on a weekly basis. No significant differences were observed between 2 groups before melatonin implanting. A significant difference was observed after melatonin implanting between 2 groups in the mean of testicular diameter (treatment: 33.5±0.25 and control: 30.67±0.07 cm), in semen volume (treatment: 1.34±0.03 and control: 0.87± 0.04 ml) and in sperm concentration (treatment: 1.76±0.05 and control: 1.37±0.04 109/ml) (p<0.05). However, other parameters including average of lives sperm percentage, total sperm motility, sperm progressive movement and percentage of abnormal sperm were not significant (p>0.05). CONCLUSIONS: The results of this experiment showed that the use of melatonin in the non-reproductive season resulted in increase of testicular size, semen volume and sperm concentration in Lori-Bakhtiari ram. However, the rest of the semen parameters have not been affected.

BACKGROUND: Major histocompatibility complex (MHC) comprises a group of genes, which plays a central role in immune response. The exon 2 of BuLA-DRB3 is part of the MHC class II in buffalo that highly polymorphic, found to be associated with resistance/susceptibility to infections and also with production parameters. OBJECTIVES: The purpose of the present study is to identify BuLA-DRB3 polymorphism in Khuzestan buffaloes and compare this population with other Iranian and world buffalo populations. METHODS: Blood samples were taken from 136 unrelated Khuzestan river buffaloes. After DNA extraction, second exon of BuLA-DRB3 was amplified by the seminested PCR method. Then, the fragments produced by amplifying second exon were cut by RsaI restriction enzyme according to van Eijik method. In the following, allelic frequencies, genotype frequencies, expected and observed homozygosty and heterozygosity were calculated. RESULTS: In restriction fragment analysis 13 and 24 different allelic and genotype patterns were identified for RsaI restriction enzyme, respectively. 10 out of 13 alleles were previously reported. The most frequent genotype was oo)0.1691) and then followed by hh (0.1544) ,ll(0.1103), lw (0.0955), lh (0,0808), ha (0.0661) and lo (0.0514). Also four most frequent alleles were o (0.2721), h (0.2316),l (0.2316)and w (0.1176), respectively. These seven genotypes and four alleles form 72.76% and74.29% overall genotype and allele frequency of population.  In addition, estimation of heterozygosity/homozygosty and deviation from Hardy-Weinberg equilibriumofcorresponding population revealed observed homozygosty is more than heterozygosity and departure of population from Hardy-Weinberg equilibrium. CONCLUSIONS: The results indicated that exon 2 of the BuLA-DRB3 gene is highly polymorphic among Khuzestan buffaloes and although, there is differences between buffalo’s genetic polymorphism of distinct world regions, Khuzestan buffaloes’ population is similar to Egyptian buffaloes’ population.

BACKGROUND: In recent years, use of herbs as dietary irritant growth factors and replacing it with artificial materials in aquaculture is discussed. Rosemary (Rosmarinus officinalis) oil is one of herbal medicines which its antioxidant and antibacterial properties have been proved in humans and animals. So it can be an alternative option in order to achieve artificial growth stimulants properties. OBJECTIVES: The purpose of this study was to investigate the effect of different levels of rosemary oil as a medicinal herb on growth parameters and gut morphology of beluga juveniles (Huso huso). METHODS: Six groups (three replicate/group) of 126 fish with initial mean body weight of 130.94 ± 5.28g were fed with diets containing 0 (control), 0/01, 0/1, 1 and 2 % of rosemary oil and a group of oxytetracyclin (30mg/kg) for 8 week. At the end of the trial, the growth parameters (final weight, specific growth rate and feed conversion ratio) were calculated. Then, beluga intestinal biopsy was performed and the mean villi length, width and surface were measured in the treatments. RESULTS: Significant increase were observed in villi length (2/25±0/11mm), width (0/52±0/01mm) and surface (1/17±0/07mm) in fish fed with diets containing 1ml/kg rosemary oil (p<0/05). There were no significant differences in growth parameters between treatments. CONCLUSIONS: According to the significant increase of beluga intestinal absorption area and slight improvement of growth parameters in fish fed with diets containing rosemary extract compared to the control group, it seems that rosemary oil can act as a growth stimulant. So it can be considered as an alternative to artificial growth stimulants in aquaculture industry.

BACKGROUND: The modern dairy cows, due to intensive selection for higher milk production during past decades, have become more resistant to insulin. Accompanied with DMI depression in per parturient dairy cow, insulin resistance may lead to a massive release of non-esterified fatty acids (NEFA) to bloodstream which might act as a start point for development of other diseases. OBJECTIVES: The purpose of this study was to investigate potentiality of long chain polyunsaturated fatty acid (LCPUFA) of marine or polyunsaturated fatty acids (PUFA) of plant origin to correct the insulin resistance induced by saturated fatty acids in cultured bovine adipocytes. METHODS: Fatty acids from different oils were isolated using KOH and were mixed together with different proportions to obtain the following profiles: 1) saturated fatty acids (SFA); 2); saturated fatty acids+n-6/n-3 PUFA (medium chain) at ratio of 1:1 (SFA-MC1:1)and3) saturated fatty acids + n-6/n-3 PUFA (long chain) at ratio of 1:1 (SFA-LC 1:1). Adipocytes were cultured for 48 in the presence of treatments and after the incubation period an epinephrine challenge was applied to stimulate lipolysis. In the adjacent culture plates for each treatment insulin was added along with epinephrine challenge in different concentrations to test sensitivity of adipocytes to insulin. After conducting insulin sensitivity test, a sample was taken from culture media and analyzed for glycerol concentration as an index of lipolysis. RESULTS: Results indicated that saturated fatty acids effectively induced insulin resistance in adipocytes. Long chain polyunsaturated fatty acids from fish oil had a significant preventive effect on insulin resistance induced by saturated fatty acids so that increasing insulin concentration linearly increased the response of adipocytes to insulin in treatment LC-SFA 1:1. Shorter chain n-3 polyunsaturated fatty acids of plant origin did not show such effects on insulin sensitivity in adipocytes. ConclusionS: n-3 fatty acids from fish oil improved bovine adipocyte sensitivity to insulin but shorter chain n-3 fatty acids did not show this ability.

BACKGROUND: Heat stress is very important in poultry production. OBJECTIVES: To evaluate the effect of oral elatoninsupplementation and increasing of dark period on biochemical profile of broiler chickens under Heat Stress (HS). ETHODS: A total of 200 day- old broiler (Arian) chicks were randomly allocated in to 4 groups (dark ,melatonin, negative and ositive controls). Melatonin group  received 40 mg melatonin/kg  diet from 30-40 days of age and chickens of dark group were xposed to  a  special lighting schedule from 10-40 days of age. All groups (except negative control) were daily exposed to HS (39± 1 c) for 6 hours per day from 35-40 days of age. At the end of 6 weeks, body weight was measured. At 30, 35, and 40 days, serum uric acid, glucose, total protein, albumin, globulin, activity of AST  and creatinine were measured.  atawas analyzed by ANOVA and Tukey test in SPSS software. RESULTS: In 30 days, there was no significant difference etween groups. In the day 35, only serum uric acid of melatonin group was significantly increased in comparison with egative control. Also, serum uric acid of melatonin group  increased significantly in 40 days in comparison with other roups, as melatonin plays an important role in the antioxidant defense system and uric acid is an important antioxidant inchickens. Serum glucose of positive control compared to other groups significantly increased in 40 days. Other biochemical parameters were not significant. In this study,the mean body weight of dark group was significantly decreased. The  percentage of mortality rate in negative control, dark, melatonin and positive control  treatments was zero, 4 ,5  and 10% respectively. CONCLUSIONS: These results demonstrate that  dark period and oral melatonin supplementation  candecrease HS.

BACKGROUND: Dietary nucleotide has been shown to improve growth indices, nutritional function and higher vertebrates in fish. OBJECTIVES: We investigated the effect of different levels of dietary nucleotide on growth parameters, whole-body composition and fluctuations of cortisol and glucose due to acute stress in Snow trout (Schizothorax zarudnyi). METHODS: One-hundred-twenty Snow trout fingerlings with average weight 7.58±0.05g, were fed with four levels of dietary nucleotides including 0 (control), 0.15, 0.25, and 0.5 percent for 8 weeks. Ten fingerlings were stocked into each 300l tank with triplicate in four treatments and fed three times daily at 3-5% body weight rate. At the end of feeding trial, weight gain, Weight gain rate, feed efficiency, Food efficiency ratio and survival were computed. Also, the numbers of fish that were exposed to acute stress (temperature and pH). RESULTS: The results showed that none of the nucleotide-supplemented diets had any significant effect on growth indices (p>0.05). None of the dietary treatments resulted in any significant changes to dry matter, ash and protein. The only significant difference was observed in the fat (p>0.05). The fish fed 0.25% nucleotide showed higher whole lipid compared to other dietary treatments. Stress test results showed no significant difference at the beginning of the experiment, whereas after, acute stress cortisol levels were significantly higher in trials. The lowest response was observed in trial with 0.50% nucleotide and the highest was in control groups. Glucose levels were not significantly different, neither before nor after acute stress. CONCLUSIONS: The nucleotide composition used in the present study failed to provide significant effects on growth of Snow trout juveniles but could improve response to acute stress.

BACKGROUND: Following the ban on the use of growth stimulant antibiotics in many countries, interest has arisen in finding  a suitable alternative for antibiotics in poultry production. OBJECTIVES: The aim of this study was to investigate the effect of supplementation of two levels of nano-copper (0 and 100 mg/kg) and two levels of mannan oligosaccharide (0 or 1 g/kg) as natural growth stimulants on digestibility of nutrients and performance in broiler chicks. METHODS: At the end of the second week of breeding, 160 Cobb-500 broiler chicks were assigned in four treatment groups. For each treatment, four replicates (10 chicks per replicate) were considered. Experiment was conducted as a 2×2 factorial model in a completely randomized design. Results: No significant differences in digestibility of nutrients and growth performance between birds that ate the supplements with control group were observed (p>0.05). CONCLUSIONS: Mannan oligosaccharides and nano-copper on growth performance and nutrient digestibility in broiler chicks had no significant effect. At the doses used, concomitant supplementation of copper and mannan oligosaccharide did not have a positive effect on traits that were studied in broilers.

BACKGROUND: Vitamin A is a lipid soluble vitamin which can be stored in the body organs (especially in liver) and its supply is only through ration. Objectives: The present study has been conducted to evaluate vitamin A status of feedlot cattle in the city of Garmsar and impact of season and nutritional management on it. Methods: During the study 100 blood samples were taken from feedlot cattle of 6 farms in cold seasons of one year and 100 samples from 5 farms in warm seasons of the same year. Also, 50 blood and liver samples of slaughtered feedlot cattle were taken from Garmsar slaughter house in each of the mentioned seasons. Serum and hepatic tissue concentrations of vitamin A and beta carotene were measured by using standard biochemical methods. Student’s t-test and Tukey’s HSD tests were used for analysis  of the results and  pResults: The results of present study showed that mean serum and hepatic concentration of vitamin A in feedlot cattle in the city of Garmsar was in defined normal range for cattle and these animals did not show any vitamin A deficiency, but mean serum beta carotene concentration was at a very low level and lower than defined normal range for this species. Mean serum vitamin A concentration of feedlot cattle in cold seasons was significantly higher than that in warm seasons (p<0.05), conversely serum beta carotene concentration of feedlot cattle during warm seasons was significantly higher than that in cold seasons (p<0.05). However, comparing vitamin A concentration of liver tissues of feedlot cattle in cold and warm seasons did not show any significant difference (p>0.05).  ConclusionS: From the results of the present study it can be concluded that serum and hepatic concentration of vitamin A in feedlot cattle of the city of Garmsar was in normal reference range of cattle, and in spite of very low concentration of serum beta carotene concentration, due to supplementation of this vitamin in feed, vitamin A deficiency did not occur in these cattle.