جستجوی مقالات مرتبط با کلیدواژه "laying" در نشریات گروه "دامپزشکی"

Infection with the Salmonella genus of bacteria causes chronic and acute diseases in poultry leading to significant economic losses to the poultry industry. The aim of the present study was to evaluate the antibiotic resistance pattern of Salmonella serotypes isolated from a number of laying poultry flocks in the northwest of the country and to investigate its relationship with the performance of those farms. Eighty samples were taken from 20 flocks suspected of salmonellosis .The samples were cultured in selective and differential cultures of Salmonella. After isolation of Salmonella serotypes, the antibiogram test was performed to determine the antibiotic sensitivity. In order to check the performance of suspicious flocks, the history of the flock was obtained and the amount of mortality and production drop was calculated by statistical methods.The results indicated that 40% of the flocks were positive in terms of the presence of Salmonella, with 30% of the flocks affected by Salmonella gallinarum, 5% by Salmonella enteritidis, and 5% by concurrent presence of both Salmonella enteritidis and Salmonella gallinarum. The highest antibiotic sensitivity of Salmonella serotypes was recorded from fosfomycin and danofloxacin with a frequency of 100% and soltrim with a frequency of 78.6%. The highest antibiotic resistance was observed against erythromycin with a frequency of 75% and chlortetracycline with a frequency of 53.6%. Based on the results, there was a statistically significant difference in  the amount of flock mortality and production drop between Salmonella negative and Salmonella positive herds (p<0.05). Also, more vigilant use of antibiotics is required due to the high levels of resistance shown by Salmonella against various antibiotic drugs.

The purpose was to investigate the insecticidal and reusable properties of Chery leaf leaves against Menopon gallinae and Megninia gynglimura parasites. To this end, 250 pieces of native fowl that were naturally contaminated with two infected parasites, and were evaluated with an extract of Cheryh tree 3% against poultry parasites. Meanwhile, powder, seed, half pelletite and 2% malathion were used. Semi seed powder in 0.5% and 1% doses of poultry slaughter were evaluated in 5 groups of 50 broiler breeders with 8 weeks of age, totaling 250 units. The data obtained in the analysis were multiplied. The results of this study showed that after 30 days of the last treatment, the effect of the drug was 100% with 3 treatments. There was no statistical difference with control group as chemical control. After 2 weeks, the exits used with seminal powder had a decrease in fertility in the number of domestic flies (p