Abstract: In order to study the bacteriostatic effect of traditional Chinese medicines on three kinds of pathogenic bacteria causing chicken bacterial diarrhea, paper strip method was applied to carry out sensitive tests of 6 self-made traditional Chinese medicines, and the tube dilution method was taken to test the minimal inhibitory concentration of the traditional Chinese medicines. Results showed that the 6 traditional Chinese medicines have varying degrees of bacteriostasis. Among the 6 traditional Chinese medicines, Compound 4 had better bacteriostasis on Escherichiacoli, the average bacteriostasis circle diameter was 21.2 mm, and the average MIC value was 62.5 mg/mL; compound 1 had better bacteriostasis on Salmonella bacillus, the average bacteriostasis circle diameter was 19.8 mm, and the average MIC value was 41.7 mg/mL; compound 3 had better bacteriostasis on Pasteurella multocida, the average bacteriostasis circle diameter was 23.3 mm, and the average MIC value was 3.92 mg/mL. The three compounds assumed high sensitivity indicated that the traditional Chinese medicines could be used in the prevention and treatment of chicken bacterial diarrhea.

Key words: traditional Chinese medicines; chicken; bacterial diarrhea; bacteriostasis test in vitro