论文部分内容阅读
目的 通过对布鲁氏菌属内S型与R 型菌种在小鼠和犬体内相互作用的研究,弄清我国布病防治中某些流行病学现象的机理。方法 将特定浓度的S型菌悬液分别与R 型菌液混合后注射于小白鼠和犬体内,20 ~25 天后解剖取小鼠局部淋巴结、肝、脾及犬脾进行培养、分离及鉴定。结果 在小鼠试验中,各种S型布氏菌均明显地干扰了R 型犬种菌的生存。但在犬体内进行的研究表明,104M 菌被RM6/66 菌干扰;Rev - 1 菌与RM6/66 菌则或相互干扰,或相互平衡。S2 在与RM6/66 相同菌量情况下,两者可以共存,以S2 稍占优势,呈互不干扰、相互共处之态。结论 研究结果能合理解释S型布病疫区内很难分离到R 型布氏菌的流行病学现象,并阐明其流行病学意义。同时提示人们,当某地布病流行的优势菌被控制后,很可能出现新的优势种的布氏菌传播、流行
OBJECTIVE: To study the mechanism of some epidemiological phenomena in the control of brucellosis in Brucella by studying the interaction between S and R strains in mice and dogs. Methods S-type bacterial suspension with specific concentration was mixed with R-type bacterial liquid and then injected into mice and dogs respectively. Twenty-five to twenty-five days later, local lymph nodes, liver, spleen and spleen of mice were dissected for culture, isolation and identification. Results In mouse experiments, various S. brucellosus RTI> species clearly interfered with the survival of R type canine bacteria. However, studies conducted in dogs showed that 104M was disrupted by RM6 / 66; Rev - 1 and RM6 / 66 were either interfering with each other or in equilibrium with each other. S2 and RM6 / 66 in the same amount of bacteria, the two can co-exist, with a slight advantage of S2, were non-interfering with each other and coexistence of the state. Conclusions The results of the study can reasonably explain the epidemiology of Brucella R type isolates that are difficult to isolate in the S-type cloth epidemic area and elucidate its epidemiological significance. At the same time, people are reminded that when the predominant bacteria prevailing in a certain area are controlled, it is very likely that the new predominant species will spread and prevail