Kavitha, RValli, CKarunakaran, KVijayarani, KAmutha, RTANUVAS2020-07-292020-07-292020-07http://krishikosh.egranth.ac.in/handle/1/5810150039TNV_IJCMAS_2020_9(7)17-24Sixteen traditional medicinal herbs that are used in Indian traditional medicine and which are commonly available in Tamil Nadu were collected for the study. Different medicinal parts of the herbs were selected and dried and grounded under aseptic condition. To determine the in vitro antimicrobial effect, aqueous and ethanol extracts were prepared and tested against Staphylococcus aureus, Escherichia coli, Salmonella entitidis and Clostridium perfringens. Allium sativum bulbs (Garlic) showed significantly higher zone of inhibition against Staphylococcus aureus, Escherichia coli and Salmonella entitidis when compared with Syzygium aromaticum bud (Clove). Other extracts evinced no zone of inhibition. In the case of Clostridium perfringens, Syzygium aromaticum bud (clove) was the only herb showed zone of inhibition. Among the ethanol extracts tested Syzygium aromaticum bud (Clove) showed significantly (p<0.05) higher zone of inhibition against Staphylococcus aureus, Escherichia coli and Salmonella entitidis. Murraya koenigii leaves (Curry leaves) was found to have highest zone of inhibition against Clostridium Perfringens.enVeterinary ScienceArticle