Prevalence, Haematological and Molecular Studies of Haemonchus contortus Isolated from Goat at AL-Muthanna Province, Iraq.

Parasitic infections, especially helminthes infections of the gastrointestinal tract due to the latent symptoms, play a vital role in the growth and efficiency of ruminants. The current research was performed to determine the prevalence of haemonchosis in goats and the effect of some risk factors, such as age, sex, and months on the infection rate. Also, our study includes investigating the haematological and biochemical changes in the haemonchosis-infected goat, then utilizing the PCR technique to confirm the H. contortus diagnosis in goats. The result of the epidemiological study revealed that only 73 out of 693 examined goats were positive to infect with Haemonchus spp. at an infection rate of 10.53%. The incidence of Haemonchosis was related to climatic conditions, with the highest (23.07 %) and lowest (4.34 %) percentages occurring in October and June, respectively. Furthermore, the highest (14.01 %) and lowest (4.76 %) infection percentages were recorded in goats aged > 5 years and 9 months to 2 years old, respectively. According to sex, infection percentages were (14.24%) and (7.02 %) for females and males, respectively. Haematological and biochemical parameters results revealed that infected goats suffered from a gradual decline in Hb concentration, pocket cell volume, total erythrocyte count, total leucocyte count, lymphocyte, neutrophil, total serum protein and albumin, while eosinophil count was increased significantly. Also, serum enzymes ALP, ALT, and AST showed significant increases in infected goats. The result of PCR showed that specific primers (HcI-F, HcI-R) successfully amplify the ITS-2 rDNA gene with 295bp -long fragment to H. controtus. Due to the effect of age, sex and season on H. contortus infection, it is crucial to have control and prevention programs and treatment schedules in the herd.

Comparison between Antimicrobial and Antibiofilm Activity of Exopolysaccharides (EPS) Extracted from Lactobacillus reuteri and Streptococcus mitis against Oral Bacteria.

Due to the increased resistance to antibiotics and chemical biocides, the use of bacterial exopolysaccharides has been considered. The objective of the current study was to investigate the strength of the antibacterial and antibiofilm activity of EPS extracted from Lactobacillus reuteri and Streptococcus mitis because previous studies showed there were structural differences between EPS, during this study, EPS extracted from Lactobacillus reuteri and Streptococcus miti by ethanol precipitation method and estimated antibacterial and antibiofilm activity against several Oral Bacteria (Staphylococcus aureus, Staphylococcus hominis, Acinetobacter baumannii, Raoultella ornithinolytica, Streptococcus thoraltensis in different concentration as (100,150,200,250,300 mg/ml ), the results showed carbohydrates rate in extracted EPS from L. reuteri and S. mitis were recorded was 85, 80 % respectively.The concentration 100 and 150 mg/ml for EPS from L. reuteri and S. mitis, there was no inhibitory effect, except in S. aureus (1.1±0.10) and S. hominis (1.0±0.10) at 100 mg/ml, 3.1±2.01, 2.1±0.54 mg/ml respectively at 150 mg/ml concentration but no significant differences (P≤0.05). However, the antibacterial effect of that EPSs started at the concentration of 200 and upwards, where different results were recorded between the concentrations of both EPSs against all bacteria isolated (P≤0.05), On the other hand, the effect of EPS from L. reuteri and S. mitis was clear against the formation of biofilm compared with the control, worth mentioning that EPS from L. reuteri was more effective compared with EPS from S. mitis in all isolates (P≤0.05) except for S. thoraltensis where it was noted that the EPS from S. mitis is more effective than EPS from L. reuteri. Through the results obtained in this study, it was noted that the difference in the structural nature of EPS has an important role in its effectiveness as an antibacterial and anti-biofilm formation and, as it was found that the EPS from L. reuteri showed more effectiveness than EPS from S. mitis and thus the mechanism of preventing and inhibiting bacteria depending of the structural nature of EPS.

Fertility, hatchability and malformations in guinea fowl embryos as affected by dietary manganese.

1. The effects of feeding diets containing 54 mg, 60 mg, 65 mg or 70 mg manganese/kg to Guinea fowls on fertility, hatchability and the occurrence of malformed embryos were studied. 2. Dietary manganese affected fertility slightly, but significantly affected hatchability and the occurrence of malformed embryos. 3. Hatchability was most significantly depressed at the lowest dietary concentration of manganese, which also caused a highly significant increase in the proportion of malformed embryos. 4. Although increasing manganese to more than 54 mg/kg improved hatchability and reduced embryonic malformations, the increase did not completely eliminate the latter condition.