Date Received: Oct 22, 2020
Date Published: Oct 29, 2021
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Detection of Swine Dysentery (SD) caused by Brachyspira hyodysenteriae via PCR in Northern Vietnam
,
Truong Quang Lam
1
,
Dao Le Anh
1
,
Nguyen Thi Hoa
1
,
Nguyen Thi Lan
1
,
Nguyen Thi Thuy Dung
1
Keywords
Swine dysentery, Brachyspira hyodysenteriae, PCR, Vietnam
Abstract
This study aimed to diagnose swine dysentery (SD) caused by Brachyspira hyodysenteriae in pigs by the PCR method in Vietnam. Of the 250 samples, 29 isolates of B. hyodysenteriae (11.60%) were identified by PCR in seven provinces of Northern Vietnam, and the infection rate differed from region to region. From the positive cases of B. hyodysenteriae, we analyzed B. hyodysenteriae infected cases according to the ages of the pigs, farm sizes, and veterinary hygiene practices to get more information about the disease in Vietnam. The results showed that the positive B. hyodysenteriae samples were commonly seen in post-weaning pigs (32.14%) in households (20.73%) with poor hygiene (24.69%). Clinical signs of SD included high fever (100%); anorexia (100%); watery, bloody diarrhea, usually gray to brown in color (100%); and weight loss (86.42%). Gross lesions of SD were limited to the large intestine were described as having a fibrinous, blood-flecked membrane covering the mucosa (93.75%), swollen with hemorrhaged colon and cecum (75.00%), and mesenteric lymph nodes (81.25%).
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