Devriese L A, Hommez J, Pot B, Haesebrouck F
Faculty of Veterinary Medicine, University of Gent, Belgium.
J Appl Bacteriol. 1994 Jul;77(1):31-6. doi: 10.1111/j.1365-2672.1994.tb03040.x.
Streptococcus suis was the most frequent Streptococcus spp. in pig tonsils, followed by the beta-haemolytic porcine 'equisimilis' ecovar of Strep. dysgalactiae. The intestinal streptococcal flora was composed of Strep. bovis, Strep. hyointestinalis and Strep. suis. Many of these intestinal Strep. suis belonged to a beta-glucuronidase-negative biotype which is infrequent in lesions. Nearly half of the strains presumptively identified as Strep. alactolyticus produced acid from lactose. This species was not found in tonsils and intestines but was about equally prevalent as Strep. hyointestinalis in pig faeces and rectal swabs. Other streptococci were rare in this material. Enterococci were much less frequently identified than streptococci in tonsils and faeces. In intestinal samples Enterococcus faecalis, Ent. faecium, Ent. hirae and Ent. cecorum were most frequently found. In faeces Ent. faecium was the most prevalent enterococcus. The characteristics of the less well known species Strep. alactolyticus and Strep. hyointestinalis are described in detail, and guidelines for their differentiation from Strep. bovis and Strep. suis given.
猪链球菌是猪扁桃体中最常见的链球菌属菌种，其次是β-溶血猪源“似马链球菌”生态变种（停乳链球菌）。肠道链球菌菌群由牛链球菌、猪肠道链球菌和猪链球菌组成。这些肠道猪链球菌中许多属于β-葡萄糖醛酸酶阴性生物型，在病变中不常见。近一半初步鉴定为不解乳糖链球菌的菌株可利用乳糖产酸。该菌种在扁桃体和肠道中未发现，但在猪粪便和直肠拭子中的流行程度与猪肠道链球菌大致相同。其他链球菌在该样本中很少见。在扁桃体和粪便中，肠球菌的鉴定频率远低于链球菌。在肠道样本中，最常发现的是粪肠球菌、屎肠球菌、海氏肠球菌和盲肠肠球菌。在粪便中，屎肠球菌是最常见的肠球菌。详细描述了鲜为人知的不解乳糖链球菌和猪肠道链球菌的特征，并给出了将它们与牛链球菌和猪链球菌区分开来的指导原则。
