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Articles by A. Nematollahi
Total Records ( 4 ) for A. Nematollahi
  Sh. Golzar Adabi , Gh. Moghaddam , A. Taghizadeh , A. Nematollahi and T. Farahvash
  The effect of two dietary levels of L-carnitine and vegetable fat powder on broiler breeder fertility, hatchability, egg yolk and serum cholesterol and triglyceride was studied. Two hundred fifty female and twenty five male (Classic Hubbard parent stock) were distributed randomly in five groups of 50 with five replicate of 10 females and one male. Two levels of L-carnitine 0, 60 ppm (for females) and 0, 500 ppm (for males) and vegetable fat powder (0, 1.5%) and a diet with high lysine and methionine (0.3%) fed for both of male and female within one of treatment were used in a complete random design of treatments. The parameters as hatchability, fertility, egg weight, albumen height, Haugh unit, color of yolk, shell thickness, shell strength, yolk weights, egg yolk and serum cholesterol and triglyceride were measured. No significant differences were observed in external and internal egg quality. Supplemented diet with L-carnitine had effect on hatchability (P< 0.05) and fertility (P< 0.01). L-carnitine had no effect on egg production except on fifth and sixth weeks (P< 0.01). None of experimental diet had no effect on male serum cholesterol, serum triglyceride in both sex and total yolk cholesterol but L- carnitine had effect on female serum cholesterol (P< 0.05). L- carnitine had decreased egg yolk cholesterol (mg/gr) (P< 0.05). Yolk weight increase in response to dietary supplementation of L-carnitine(P< 0.05) and L-carnitine content of egg yolk increase with L-carnitine supplementation (P< 0.05).
  A. Nematollahi , Gh. Moghaddam and F. Nyiazpour
  This survey was designed to study the parasitological features and clinical symptoms due to the infestation of gastrointestinal nematodes in sheep. Two sheep naturally infested to gastrointestinal nematodes were obtained and were selected as egg donors. For experimental infestation eight free worm lambs (5-6 months old) were selected and 50000 of third stage larvae of gastrointestinal nematodes that were obtained from eggs of donor sheep were fed to each of them. Four other lambs received placebo (control group). Daily stools from infected sheep were taken for parasitological examinations. Body weight and clinical symptoms were recorded. Twelve, 21, 35 and 60 days after infestation two lambs were slaughtered and established worms from fed larvae were counted. Results were analyzed by ANOVA. No clinical symptoms (except anemia) were found in the animals during this study however body weight is monitored during 60 days post infestation and indicated a significantly difference between live weight in infested and control groups. The adult worms occurred from fed larvae were 2665 (5.3%) and maximum E.P.G at 35th day post infestation was recorded. The lengths of male and female worms in the abomasums were 13.2 and 20.8 mm respectively. Also worms at 35th day post infestation had high size.
  A. Nematollahi , S.H. Hosseini and A.Eslami
  For determination the inducing factors of arrested development of 3th stage larvae of Haemonchus contortus as early L4 in sheep in 2 out of 4 climatic conditions of Iran, 24, six month old native sheep (shall breed) were randomly allocated into 3 equal groups I, II and III.Each sheep in each group received 10000 local isolate of H.contortus larvae not known to exhibit hypobiosis as follow: (i)Freshly collected larvae were given to group I, (control group).(ii)Larvae stored at 8-10 oc and 70% humidity for six weeks (simulating autumn climatic conditions of zone I) to group II.(iii)-larvae exposed to 30-350oc and 40% humidity for six weeks (simulating autumn climatic conditions of zone III) to group III.Two Iambs in each group at 12, 21, 35 and 60 days post infection were necropsies and the number of adult and larvae were counted. Our findings suggest that the rate of arrested larvae in group II were statistically significant (p< 0.01), whereas in two other groups only a very small number of larvae were subjected to hypobiosis. Meanwhile the number of adult worms recovered from group I receiving fresh larvae was higher than the other two groups.
  A. Nematollahi , Gh. Moghaddam and F. Niyazpour
  This study was conducted on 1090 chicks (2-6 weeks of age) from 218 broiler farms stayed in Tabriz northwest of Iran. These chicks were submitted for post-mortem and parasitological examinations. Five Eimeria sp. were identified: E. acervulina, E. tenella, E. necatrix, E. maxima and E. mitis. The overall prevalence of Eimeria sp. among examined farms was 55.96% (122 of 218 farms). E. acervulina was the most prevalent species (23.58%). Prevalences did not vary by flock size. Also, neither the use of coccidiostat nor previous coccidiosis clinical outbreaks were associated with the prevalence of infestation. The prevalence of infestation increased with the age of the chickens. Chickens with 5 weeks of age showed the highest prevalence of infestation.
 
 
 
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