Clinicopathological and bacteriological studies on lamb bacterial enteritis and monitoring the oregano oil and vitamins A,D3,E effect on its treatment

Objective: The objective of the study was to assess the effect of A,D3,E (I/M) and oregano oil extract 15% on some clinicopathological parameters during lamb bacterial enteritis treatment. Materials and Methods: Sixty Barki lambs, 20 apparently healthy (control group) and, 40 suf¬fered from bacterial enteritis [enteric group (EG)], were subdivided into four treated groups (TGs): antibiotic group (AG), antibiotic + A,D3,E group (A + A,D3,E), antibiotic + oregano oil (AOG), and oregano group (OG). Fecal swabs were collected from EG then aseptically cultured, isolated, phe¬notypically identified, genotypically confirmed, and sequenced by PCR 16srRNA. Paper disk dif¬fusion test was used for estimation of oregano oil extract 15% antibacterial activity. After blood sample aspiration from all animals, they were clinicopathologically and statistically analyzed. Results: Escherichia coli, followed by Salmonella species and then Klebsiella species, was the main causative agents of lamb diarrhea and were susceptible to oregano oil extract 15%. A + A,D3,E and AOG showed significant (p < 0.05) enhancement of some clinicopathological parameters more than AG or OG. Matrix metalloproteinases (MMP-2 and MMP-9) and total antioxidant capacity (TAC), yielded area under the curve, sensitivity, negative predictive value as 1, 100% and 100% respectively, were determined in both EG and TGs. Conclusion: Oregano oil extract 15% has good antibacterial properties against enteric bacteria in vitro and in vivo. The combination between antibiotic and antioxidant vitamins or oregano plant extract of 15% has a good impact on some clinicopathological alterations in lamb bacterial enteri¬tis treatment. TAC, MMP-9, and MMP-2 may be good markers for the disease and its treatment follow-up. [J Adv Vet Anim Res 2021; 8(2.000): 291-299]