Histopathological and cytopathological findings in minipigs infected with Streptococcus suis serotype 2

Author:

Xie Chun1,Hou Yi-Xuan1,Zhao Yu-Ting1,Cai Xue-Hui2,Li Cai-Ying13,Li Pei-Feng3,Li Yun-Zhang3,Su Xue13,Yue Xiu-Wei1,Wang Shu-Jie2,Liu Yong-Gang2,Yang Wei-Jun13,Yuan Cong-Li1,Cu Li1,Hua Xiu-Guo1,Yang Zhi-Biao1

Affiliation:

1. Shanghai Key Laboratory of Veterinary Biotechnology, School of Agriculture and Biology, Shanghai Jiaotong University, Shanghai 200240, China

2. Division of Swine Infectious Diseases, National Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute of Chinese Academy of Agricultural Sciences, Harbin 150001, China

3. College of Veterinary, Inner Mongolia Agriculture University, Huhhot 010018, China

Abstract

Abstract Five pathogen-free miniature pigs (minipigs) were infected with the virulent strain SH08 of Streptococcus suis 2 (SS2) by intramuscular injection. The pigs died consecutively within 72 h after the challenge. An additional five non-infected pigs were euthanised and used as controls. Microstructural observations showed that degeneration, bleeding, congestion, cellular necrosis, and an increase in inflammatory cells were present in all organs and tissues except the brain. Ultrastructural observations revealed mitochondrial vacuolation and malformed or missing cristae, indicating that infection of minipigs with strain SH08 of SS2 can lead to extensive lesions in major internal organs and tissues. The findings also demonstrated that the minipig is a useful model for the study of SS2 infection.

Publisher

Walter de Gruyter GmbH

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