جستجوی مقالات مرتبط با کلیدواژه « intensity » در نشریات گروه « دامپزشکی »

Due to the lack of an international standard method to determine the frequency, prevalence and intensity of nosemosis, the researchers are still using individual or composite sampling methods. This study was aimed to compare the frequency and intensity of nosemosis based on the above mentioned methods in the apiaries of East Azerbaijan province. To this end, 5 apiaries from 5 cities of East Azerbaijan province were randomly selected. Three hives from each apiary and 10 bees from each hive (equally from inside and outside) were sampled. To determine the frequency, the spore presence in the samples was evaluated. To determine the intensity, the spore count in one bee was calculated in the individual samples and mean spore count per bee in the composite samples. In both methods, 100% frequency was obtained for all samples. To compare infection intensity in both sampling methods, one-way analysis of variance and Tukey's post hoc test were used. To compare the results of two methods, generally, and also in each city, separately, independent T-test was used. In both methods, the highest intensity was related to samples from Tabriz (p<0.05). However, in the individual sampling method, the infection intensity in Osku samples was significantly lower (p<0.001). Also, in comparison of the two sampling methods, there was generally no statistical difference between the sampling methods and even in one city (p>0.05). In individual samples, overall, the intensity was higher in bees outside of the hive. Based on the average results, the intensity of nosemosis in composite samples was much higher than individual samples.

Dicrocoeliasis is caused by digenean trematode of Dicrocoelium dendriticum, small liver fluke, a hepatic parasitic disease in ruminants and human, throughout the world. D. dendriticum infection has been considered to be correlated with the economic and veterinary aspects.
The aim of the present study was to determine the prevalence and intensity of infection with D. dendriticum in sheep and cattle in Guilan, Mazandaran and Golestan provinces from Caspian Sea Littoral, Northern part of Iran.
For this purpose, 4 cities in every province, 4 villages in each city, and 4 districts in each village were chosen for sampling. Totally, 1344 faecal samples of sheep and cattle were examined. It should be taken in to consideration that the number of eggs per gram of feces (E.P.G) was determined by flotation technique.
The results suggested that sheep was infected 4-5 times more than cattle in all three provinces. The average of prevalence of D. dendriticum infection in sheep and cattle were 38.43% and 9.37%, respectively in Guilan province. The average of prevalence in Mazandaran province was determined to be 21.35% and 4.16% in sheep and cattle, respectively. It is worth noting that the highest infection rates were occurred in Chalus and Noor from Mazandaran province. The average of D. dendriticum infection was determined to be 6.87% in sheep and 1.87% in cattle from Golestan province.
Our results indicated that not only the prevalence but also the intensity of infection were higher in sheep compared to cattle Furthermore, the rate of infection was about two fold higher in both hosts from Guilan province. Therefore, according to the higher prevalence of infection in two provinces of Guilan and Mazandaran and the importance of sheep in distribution of infection, sever control program are required by providing comprehensive plans.