닭의 호흡기성(呼吸器性) Mycoplasma 균병(菌柄)에 대한 Furamizole 의 예방시험(豫防試驗)

A number of chemotherapeutic agents, namely antibiotics, sulfonamides and nitrofuran derivatives have been used, as a fred additive, for the purposes of growth improvement of chicken, increase of feed efficiency, decrease of animal mortality, and disease prevention. In these experiments, furamizole which is one of nitrofuran derivatives and feed additive was test, in field, its antibacterial activity against Mycoplasma gallisepticum causing air sac disease, its effect on pullorum disease control, its effect on the lowering the mortality of chicken and finally the increase of feed efficiency. Throughout the studies, furamizole, in concentration of 0.025% in feed fed to baby chicken continuously resulted as following: 1. Tested chicken showed no avian mycoplasma infection compared to 3.7% outbreak in control chicken. 2. Tested chicken showed a low degree of outbreak of pullorum disease. However, its outbreak was much more surpresed compared to that of control chicken. 3. Total mortality rate of 5.5% and 30.8% were obtained in test and control chicken respectively. 4. Feed efficiency were 2.83 and 2.97 in test and control chicken respectively.