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Herbal biosynthesis of zinc Nanoparticles and evaluation of their antifungal and antibacterial effect for buffaloes skin affections

Author: 
Hassan A. Atef., Hanan K. Mahmoud, Taha Hesham, Rasha M.H. Sayed El-Ahl and Mahmoud, H. H.
Subject Area: 
Health Sciences
Abstract: 

Herbal biosynthesis of zinc oxide nanmoparticles )ZnONPs) using extract of Corriandrum sativum plant leafs and evaluation of their antimicrobial potential against some fungal and bacterial causes of skin affection in buffaloes were investigated. Out of 100 buffaloe cases that showed skin lesions and 30 apparently healthy cases, the fungi of Trichophyton verucosum, T. mentagrophytes and C.albicans were recovered from (50%, 31% and 15%) of hair and from (65% ; 37% and 13%) of skin scales samples of affected animals, respectively. The apparently healthy animals had comparatively lower rate of infection that ranged from 0.3-1%. On the other hand, bacterial species of Dermatophilus congolensis and S. aureus were recovered from 15% and 13% of hair samples and from 17% and 14% of skin scales samples of the affected animals, respectively. Whereas, in case of apparently healthy animals, all cases were not affected by Dermatophilus congolensis and only 1.8% of hair and 6 % of skin scraping samples were affected by S. aureus, respectively. The ZnONPs was synthesized using extract of Corriandrum sativum plant, identified and characterized by visual inspection; in a UV-visible spectrophotometer and Scanning by transmission electron microscope (TEM) and scanning electron microscope (SEM) for detection of their particle size and the purity of the prepared powder. The particle size of prepared ZnO nanoparticles was 50 nm. The antimicrobial potential of prepared ZnONPs was evaluated by broth microdilution methods against recovered microbial species from skin affection of buffaloes. As the concentrations of ZnONPs increased, the optical density and turbidity of treated spore suspension decreased and reached 100% transmittance and clear medium at the MIC of ZnONPs. The MIC that inhibited 50% of the growth of T.verucosum and T.mentagrophytes was 11 -12 mg/ml and it was 17 and 14 mg/ml for MIC 100%, respectively. The MIC that inhibited 50% of the growth of D.congolenesis, S. aureus species was 12.5-25 ug/ml and it was 150 ug/ml for MIC 100%, respectively. The treated fungal and bacterial cells were subjected to SEM, the damage and rupture of their cell wall was detected or membrane damage and some pits that have been caused leakage in inter cellular components and finally cell death. Further studies are needed to investigate the efficacy of pharmaceutical preparation of ZnONPs as ointments, skin lotions and synergistic therapy with other traditional antibiotics in the treatment of animal skin diseases.

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