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Articles by Maryam Ansari-Lari
Total Records ( 3 ) for Maryam Ansari-Lari
  Maryam Ansari-Lari
  To determine the perinatal calf mortality in the region and to study some of contributing factors, a retrospective survey was conducted in the Fars province, southern Iran. Using monthly report of 64 registered dairy herds, data about births since September 2003 to December 2004 was obtained from the Agricultural Jihad Organization of the province including parity of dam, dystocia, sex of calves, and it's survival up to one hour of birth. Dystocia was recorded as birth without assistance, with one assistant, with two assistants and with jack. Mortality rate was calculated as proportion of died calves to all births. According to number of dairy cows, study herds were categorized as less than 50 heads, 50-100 heads and more than 100 heads. Statistical analysis was done by Chi-square test, Fisher's exact test and logistic regression. The mortality rate was 3.5%. There was no significant association between parity of dam, sex of calf and season of calving with mortality. Overall dystocia rate was 9.8% with significantly highest level in heifers (p<0.001). There was strong association between degree of dystocia and mortality rate. Odds of death was 4 times in calving with one assistant (OR = 4.26, 95% CI: 1.5-11.4) and 44 times (OR = 44.5, 95% CI: 14.5-136.1) in pull with jack compared to calving without assistance. In difficult calving, there was significant trend for mortality to increase with parity (p = 0.008). Herd size had no effect on calf mortality however larger herds had significantly higher level of dystocia (p<0.001). According to this study, difficult calving is the most important factor affecting the calf mortality. Also, heifers are at greatest risk due to high level of dystocia. However, when calving is difficult, multiparous dams have more risk for calf death compared with heifers.
  Maryam Ansari-Lari
  Renal disease is not uncommon in food animals and information resulting from abattoir data is a good source for evaluation and monitoring of renal disease in livestock. In this regard daily condemnation records in an abattoir in Shiraz, Fars province, south of Iran during 20 March 1999 to 19 March 2004 was used to determine the condemnation rate of kidneys in cattle, sheep and goats in the region. A total of 844,309 animals (cattle 131,716; sheep 577,090; goats 135,233) were slaughtered and overall 5.4, 1.1 and 2.3% of kidneys were condemned in cattle, sheep and goats respectively. Nephritis was responsible for 66, 25 and 16% of total condemnation in these species respectively. There was significant downward trend for total kidney condemnation and nephritis specific condemnation in cattle and sheep during the study period. In goats, rejection due to nephritis was decreased but total rejection did not decline significantly. Implementation of intensive livestock rearing systems and replacement of many traditional small-holder farms with industrial ones in recent decades all over the country including Fars province may be an important factor in the overall improvement of health and welfare of livestock in the region. This study could provide preliminary data for monitoring kidney disease and a useful baseline for future comparison.
  Mostafa Saadat and Maryam Ansari-Lari
  Published studies have confirming or refusing an association between either glutathione S-transferase T1 (GSTT1) or M1 (GSTM1) polymorphism and asthma risk. Therefore the present meta-analysis was done. Literature-based meta-analysis was supplemented by tabular data from investigators of all relevant studies of two GST polymorphism (GSTM1 and GSTT1) available before May 2006, with investigation of potential sources of heterogeneity. Included in the resent study were 14 studies, involving a total 2292 asthma patients and 5718 controls. We found substantial evidence of heterogeneity between the studies. Exclusion of two studies with lowest quality scores resulted in a dramatic decrease in heterogeneity. The overall OR of the asthma risk associated with GSTM1 null genotype was 1.20 (95% CI: 1.08-1.35). Stratifying the meta-analysis by age and smoking status of subjects, the pooled ORs for GSTM1 null genotype were 1.56 (95% CI: 1.25-1.94) in adults and 1.95 (95% CI: 1.21-3.13) in non-smokers. The GSTT1 null genotype was associated with asthma risk in non-smoker adults (OR = 2.06, 95% CI: 1.21-3.71). To investigate whether profile of GST genotypes are associated with the risk of the asthma, further analysis combining the GSTT1 and GSTM1 genotypes were also carried out. Subjects with null genotypes for both GSTM1 and GSTT1 were at a significant higher risk for developing 2 = 12.07, df = 1, p = 0.0005). Overall, our present meta-analysis revealed that the null genotypes of GSTM1 and GSTT1 are associated with risk of asthma in adults especially in non-smoker ones. It might be suggested that chronic smoking carries such a high dose of toxins into the body that overloads the capacity of either GSTM1 or GSTT1 detoxification system. It seems that the GSTM1 and GSTT1 lack their protective values against development of asthma in adults with positive history of smoking. Present results also suggested that there is an additive effect for GSTT1 and GSTM1 genotypes.
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