جستجوی مقالات مرتبط با کلیدواژه "1" در نشریات گروه "دامپزشکی"

This study was conducted to investigate the effect of dietary supplementation of selenium nanoparticles (SeNP) and selenium yeast (SY) on ruminal protozoan population and ammonia nitrogen of Baluchi male lambs. Thirty Baluchi lambs with an average initial body weight of 21.56±0.33 kg were used in a completely randomized design with 5 treatments and 6 repetitions for 70 days (14 days of adaptation and 56 days of data collection). The experimental groups were 1) control (without selenium supplement), 2), 3) and 4) were feeding with 0.4, 0.8 and 1.2 mg Se/kg of diet as SY respectively, and 5) feeding with 0.4 mg Se/kg of diet as SeNP. The results showed that the number of protozoa in the ruminal fluid of lambs receiving 0.8 and 1.2 mg of Se/kg of diet as SY and 0.4 mg of Se/kg of diet as SeNP was higher than that of the control group (P<0.05). In addition, both SY and SeNP sources significantly increased the number of Ophryoscolex species, while 0.4 mg of Se as SeNP resulted in a significant increase in Dasytricha species (P<0.05). Furthermore, dietary supplementation of 0.8 mg of Se as SY and 0.4 mg of Se as SeNP increased the number of Diplodinium species (P<0.05). However, the populations of Entodinium and Isotricha species were not affected by the experimental treatments. Feeding with 0.8 and 1.2 mg of Se as SY/kg of diet and 0.4 mg of Se as SeNP/kg of diet led to decreased ruminal ammonia nitrogen quantity (P<0.05). The results of this research indicated that dietary selenium supplementation as Nano selenium and selenium yeast, can increase the protozoa population and decrease the concentration of ammonia nitrogen in the ruminal fluid of Baluchi fattening lambs.

Contamination of food by microorganisms is a serious public health concern that can cause foodborne diseases. The purpose of this study was to investigate the contamination with Staphylococcus aureus, Escherichia coli, Listeria and Yersinia in sausages and sausages offered in Karaj city. In this study, 191 sausage samples and 192 sausage samples were randomly sampled from the supply centers of this product in Karaj city and transferred to the laboratory under sterile conditions. The samples were tested according to the standard method for contamination evaluation. SPSS software and chi-square method for statistical analysis of data and (p<0.05) was considered as the significance level. The results showed that the most contamination in sausages was related to Staphylococcus aureus. Out of a total of 384 samples, the average contamination in sausages and sausages sold in Karaj county was Escherichia coli 77.6%, Salmonella 7.29%, Staphylococcus aureus 40.36% and Yersinia enterocolitica 0.78%. The results showed that there is no significant relationship between the contamination of sausages and sausages (p>0.05). Considering the high level of contamination among the samples, it is necessary and necessary for the authorities to monitor the quality of food as much as possible in order to prevent the occurrence of infections and food poisoning that endanger human health.

Macrorhabdosis, also known as Megabacteriosis, is a wasting disease in birds caused by the fungus Macrorhabdus ornithogaster. This study aimed to detect the fungus using PCR from the feces of birds showing clinical signs of infection, and to perform a phylogenetic analysis of the collected isolates. In this study, 54 positive samples were detected among the 300 suspicious birds referred to the wet smear method. Subsequently, the polymerase chain reaction (PCR) technique was employed for the final diagnosis. Positive samples were then subjected to PCR analysis using panfungal primers. For phylogenetic evaluation, 15 samples were sequenced, and the resulting sequences were compared with entries in the World GeneBank to assess their similarity and overlap. A total of 300 stool samples were subjected to analysis using the wet smear technique, of which 54 were found to be positive. Furthermore, 33 samples were identified as positive using the PCR method. Sequencing revealed the presence of M. ornithogaster in only two samples from lovebirds. Phylogenetic analysis showed an 86.76%-100% similarity between the isolates from budgerigars and finches and sequences recorded in the NCBI database. These findings highlight that PCR is an effective diagnostic tool for M. ornithogaster due to its speed, accuracy, and sensitivity.