Poutrel B
Am J Vet Res. 1983 Mar;44(3):490-2.
A total of 144 strains of mastitis streptococci (groups B, C, and D) were grouped by conventional technique (Lancefield precipitin test) latex agglutination (LA), and coagglutination (CA). The LA correctly grouped 98% and the CA grouped 100% of strains on the test when the instructions of the manufacturers were followed. Sensitivity of both tests was improved for strains belonging to group D when extracts from colonies grown on sheep blood agar plates were used for grouping. Nonspecific reactions between groups C and B were observed only with one kit of LA reagents, whereas cross-reactions were recorded with all groups when CA reagents were used.
采用传统技术（兰斯菲尔德沉淀试验）、乳胶凝集试验（LA）和协同凝集试验（CA）对总共144株乳腺炎链球菌（B、C和D组）进行分组。按照制造商的说明进行操作时，LA对98%的菌株分组正确，CA对100%的菌株分组正确。当使用在绵羊血琼脂平板上生长的菌落提取物进行分组时，两种试验对D组菌株的敏感性均有所提高。仅在一套LA试剂中观察到C组和B组之间的非特异性反应，而使用CA试剂时，所有组之间均记录到交叉反应。
