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Survey and Experimental Infection of Enteropathogenic Escherichia coli in Common Marmosets (Callithrix jacchus).

Survey and Experimental Infection of Enteropathogenic Escherichia coli in Common Marmosets (Callithrix jacchus).

Authors :
Nobuhito Hayashimoto
Takashi Inoue
Hanako Morita
Masahiko Yasuda
Masami Ueno
Kenji Kawai
Toshio Itoh
Source :
PLoS ONE, Vol 11, Iss 8, p e0160116 (2016)
Publication Year :
2016
Publisher :
Public Library of Science (PLoS), 2016.

Abstract

Common marmosets (Callithrix jacchus) are frequently used for biomedical research but can be afflicted with diarrhea-a serious and potentially lethal health problem. Enteropathogenic Escherichia coli (EPEC) is thought to be the causative pathogen of hemorrhagic typhlocolitis in common marmosets, but the actual incidence of the disease and the relationship between EPEC and hematochezia are unknown. This study investigated the prevalence of EPEC infection in common marmosets and the association between EPEC and hematochezia. A total of 230 stool or rectal swab samples were collected from 230 common marmosets (98 clinically healthy, 85 diarrhea, and 47 bloody stool samples) and tested by culture-based detection and PCR amplification of VT1, VT2, LT, ST, eae, and bfp genes. Healthy animals were divided into three groups (n = 4 each for high and low concentration groups and n = 2 as negative control), and those in the experimental groups were perorally inoculated with a 2-ml of suspension of EPEC R811 strain adjusted to 5 × 108 (high concentration) and 5 × 104 (low concentration) CFU/ ml. Two animals in each group were examined 3 and 14 days post-inoculation (DPI). EPEC was detected in 10 of 98 clinically healthy samples (10.2%), 17 of 85 diarrhea samples (20%), and all 47 bloody stool samples (100%), with a significant difference detected between presence of EPEC and sample status (P < 0.01). Acute hematochezia was observed in all animals of the high-concentration group but not in other groups at 1 or 2 DPI. A histopathological examination revealed the attachment of gram-negative bacilli to epithelial apical membranes and desquamated epithelial cells in the cecum of animals in the high-concentration group at 3 DPI. These findings suggest that EPEC is a causative agent of hemorrhagic typhlocolitis in common marmosets.

Subjects

Subjects :
Medicine
Science

Details

Language :
English
ISSN :
19326203
Volume :
11
Issue :
8
Database :
Directory of Open Access Journals
Journal :
PLoS ONE
Publication Type :
Academic Journal
Accession number :
edsdoj.ba719d0f04ec4d1baaa6b3044e6b4348
Document Type :
article
Full Text :
https://doi.org/10.1371/journal.pone.0160116