Planta Med 2012; 78 - PF31
DOI: 10.1055/s-0032-1320578

Antibacterial activity of Thai medicinal plants against five Salmonella species isolated from diarrheal broilers

W Ketpanyapong 1, S Panthong 2, A Itharat 2
  • 1Department of Animal Science, Faculty of Agricultural Technology and Agroindustry, Rajamangala University of Technology Suvanabhumi, Muang. Ayuttaya
  • 2Applied Thai Traditional Medicine Centre, Faculty of Medicine, Thammasat University, Klongluang, Pathumthani,Thailand

The ethanolic extracts of forty Thai medicinal plants and three preparations used for antidiarrheal treatment in Thai traditional medicine were determined antibacterial activity against five Salmonella species isolated from diarrheal broilers such as S. tyhimirium, S. hadar, S. virchow, S. infantis and S. enteritidis. Disc diffusion and broth dilution method were used for testing. Surprisingly, only six plants showed antibacterial activity against these five species. Caesalpinia sappan wood extract exhibited the highest antibacterial activity against all isolated Salmonella strains with diameter of clear zone as 10.33–16.33mm and MIC values between 0.3125–1.25mg/ml following by Strephania venosa root and Tinospora crispa leaves extracts (diameter of clear zone as 8.67–11.00 and 9.00–10.33mm, MIC values of all strains as 5mg/ml on both extracts). The ethnomedical used of the positive plant results were discussed and continued the studying for product development as antidiarrheal drugs for broilers.