Phagocytosis of Streptococcus uberis by bovine mammary gland macrophages

被引:19
作者
Grant, RG [1 ]
Finch, JM [1 ]
机构
[1] Inst Anim Hlth, Compton Lab, Newbury RG20 7NN, Berks, England
关键词
D O I
10.1016/S0034-5288(97)90184-3
中图分类号
S85 [动物医学(兽医学)];
学科分类号
0906 ;
摘要
The ability of macrophages isolated from the bovine mammary gland to phagocytose and kill Streptococcus uberis was investigated. The strains of S uberis used were selected on the basis of their known resistance (C197C) or sensitivity (EF20) to phagocytosis by bovine peripheral blood neutrophils in the same assay system. Macrophages isolated from mammary secretions collected during the mid-dry period were capable of phagocytosing both strains of S uberis in the presence of serum and skimmed milk. The removal of complement from serum by brat-inactivation did not influence the opsonization of S uberis for phagocytosis by mammary macrophages and both IgG1 and IgG2 isotypes were found to opsonise both strains. The uptake of S uberis into the cells was confirmed by electron microscopy. Potential mechanisms by which S uberis could resist phagocytosis by neutrophils but not by macrophages are discussed.
引用
收藏
页码:74 / 78
页数:5
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