作者：
Deng Zhibang*;Gong Qianlong;Wang Naidong;Yuan Anwen;Yu Xing Long
期刊：
TURKISH JOURNAL OF VETERINARY & ANIMAL SCIENCES,2013年37(4):475-478 ISSN：1300-0128
通讯作者：
Deng Zhibang
作者机构：
[Gong Qianlong; Yu Xing Long; Deng Zhibang; Wang Naidong; Yuan Anwen] Hunan Agr Univ, Coll Vet Med, Changsha, Hunan, Peoples R China.
通讯机构：
[Deng Zhibang] H;Hunan Agr Univ, Coll Vet Med, Changsha, Hunan, Peoples R China.
关键词：
PCV2b DNA-positive semen;artificial insemination;PCV2b transmission to fetuses;reproductive failure;Kunming mice
摘要：
In order to investigate whether porcine circovirus 2b (PCV2b) can be replicated in the spermatids of mice and whether semen from PCV2b-infected male mice can induce reproductive failure in female mice, 10 male Kunming mice were intraperitoneally inoculated with PCV2b, and 10 female Kunming mice were artificial inseminated with semen from the PCV2b-inoculated male mice. Semen from inoculated male mice and newborn mice or dead fetuses from inseminated female mice were tested for PCV2b by polymerase chain reaction, transmission electron microscopy, and immunofluorescent histochemistry. The results showed that PCV2b was capable of being replicated in spermatids in Kunming mice and could be transmitted from semen to fetuses by artificial insemination, causing reproductive failure in pregnant Kunming mice and PCV2b vertical infection to the newborn mice.
作者机构：
[Gong, Qian Long; Xue, Li Qun; Wang, Nai Dong; Yu, Xing Long; Deng, Zhi Bang; Luo, Wei; Yuan, An Wen] Hunan Agr Univ, Coll Vet Med, Changsha 410128, Hunan, Peoples R China.
通讯机构：
[Xue, Li Qun] H;Hunan Agr Univ, Coll Vet Med, Changsha 410128, Hunan, Peoples R China.
关键词：
Porcine circovirus;PCV2b transmission;contact and vertical infection;Kunming mice
摘要：
To investigate porcine circovirus type 2b (PCV2b) transmission by contact and vertical infection in Kunming mice (an outbred mouse stock deriving from Swiss albino mice with a high ratio of gene heterozygosis), four mice in cage 6 were inoculated with PCV2b and 25 mice without any treatment were placed into cages 1 to 5 (five mice in each cage). Seven days after being infected, the PCV2-binoculated mice were co-mingled with non-inoculated mice from cages 1 to 5 successively at 7, 14, 21, 28 and 35 days post infection (dpi), respectively, for 3 days. In addition, eleven pregnant mice were injected with PCV2b. Samples were collected from non-inoculated mice and three newborn mice from each litter for PCV2b detection by polymerase chain reaction (PCR) and immunohistochemistry (IHC). The PCR results showed that PCV2b transmission rate among mice in cages 1, 2, 3, 4 and 5 was 0/5, 2/5, 5/5, 5/5 and 1/5, respectively. PCV2b antigen signals generally appeared in most organs of the non-inoculated mice in which viruses were detected by PCR. PCV2b DNA was also detected in newborn mice of PCV2b-infected litters, and viral antigen signals were observed in their organs as well. PCV2b was transmitted in Kunming mice by contact, and it also caused vertical infection through the placenta.
通讯机构：
[Xue, Li-Qun] H;Hunan Agr Univ, Coll Vet Med, Changsha 410128, Hunan, Peoples R China.
关键词：
Mouse model;PCV-2b;Histopathological lesions;Viral distribution
摘要：
The viral distribution and lesions in Kunming mice experimentally infected with porcine circovirus type 2b (PCV-2b) were investigated. Seventy special pathogen free mice were divided into 2 groups with 35 mice in each group. The test group (TG) was infected with PCV-2b, the control group (CG) was inoculated with sterile cell cultures. Five mice in each group were sacrificed at 3, 7, 14, 21, 28, 35 and 42 dpi (day post infection), respectively. Necropsies were performed on all mice and tissues were collected for testing by histopathology, immunohistochemistry, transmission electron microscope (TEM) and polymerase chain reaction (PCR). Apoptosis and necrosis in lymphoid organs were observed in virus-infected mice, and became severe from 14 to 28 dpi. The proportion of PCV-2b antigen-positive cells was moderate in lung, heart, thymus, liver or kidney, and low in brain from TG. In spleen and cervical lymph node, the proportions of PCV-2b antigen-positive cells were low to high from 7 to 28 dpi, and moderate from 35 to 42 dpi. PCV-2b DNA was detected in all tissues examined in TG from 7 to 42 dpi. Viral inclusion bodies presented in the cytoplasm of lymphocytes, macrophages, hepatocytes, podocytes, neurocytes, spermatids and uterine epithelial cells in TG. In CG, no viruses and viral lesions were detected. PCV-2b could replicate in mice, and PCV-2b associated lesions in mice were similar to those observed in pigs. The present results indicate that it is possible to use Kunming mouse as an animal model for PMWS research.
