Nomenclature Abstract for Brachyspira hyodysenteriae (Stanton 1992) Ochiai et al. 1998 emend. Hördt et al. 2020.

2003 ◽  
Author(s):  
Charles Thomas Parker ◽  
Nicole Danielle Osier ◽  
George M Garrity
Keyword(s):  
Brachyspira Hyodysenteriae

scholarly journals Detection of Brachyspira hyodysenteriae, Lawsonia intracellularis and Brachyspira pilosicoli in feral pigs

2009 ◽  
Vol 134 (3-4) ◽  
pp. 294-299 ◽  
Author(s):  
N PHILLIPS ◽  
T LA ◽  
P ADAMS ◽  
B HARLAND ◽  
S FENWICK ◽  
...  
Keyword(s):  
Lawsonia Intracellularis ◽  
Brachyspira Pilosicoli ◽  
Brachyspira Hyodysenteriae ◽  
Feral Pigs

scholarly journals A survey on the occurrence of Brachyspira pilosicoli and Brachyspira hyodysenteriae in growing-finishing pigs

F1000Research ◽  
2019 ◽  
Vol 8 ◽  
pp. 1702
Author(s):  
Arkadiusz Dors ◽  
Ewelina Czyżewska-Dors ◽  
Grzegorz Woźniakowski
Keyword(s):  
Real Time ◽  
Real Time Pcr ◽  
Finishing Pigs ◽  
Lawsonia Intracellularis ◽  
Fecal Samples ◽  
Brachyspira Pilosicoli ◽  
Brachyspira Hyodysenteriae ◽  
Veterinary Research ◽  
Two Samples ◽  
Intestinal Pathogens

Background: The major pathogenic intestinal spirochetes affecting pigs during the growing- finishing stage of production include Brachyspira hyodysenteriae and Brachyspira pilosicoli. Infections by these pathogens, which affect the economics of pig production, can result in mortality, growth rate losses and substantial antibiotic costs. The aim of this study was to assess the current occurrence of B. hyodysenteriae and B. pilosicoli in Polish pig herds. Moreover, associations between the presence of diarrhea or other intestinal pathogens and occurrence of B. hyodysenteriae and B. pilosicoli in pigs were investigated. Methods: Between January 2017 and August 2019, a total of 401 samples of pig feces from 95 different herds were submitted to the National Veterinary Research Institute of Poland. These samples were obtained from pigs older than 7 weeks. All the received fecal samples were examined for the presence of B. hyodysenteriae, B. pilosicoli and Lawsonia intracellularis by real-time PCR. Results: For B. pilosicoli, 4.5% (95% CI, 2.5–7.0%) of samples and 13.7% (95% CI, 7.5–22.3%) of herds were positive. Out of 12 samples, B. pilosicoli was detected simultaneously with L. intracellularis, B. hyodysenteriae and B. pilosicoli were detected alone in two samples each. In terms of B. hyodysenteriae, 7.0% of samples (95% CI, 4.7–9.9%) from 18.9% of herds (95% CI, 11.6–28.3%) were positive in real time PCR. The presence of B. hyodysenteriae in fecal samples was associated with the presence of diarrhea in pigs. Conclusions: This study confirmed that B. pilosicoli infections occur in Polish pig herds, but the prevalence is at a low level and the presence of B. pilosicoli is not associated with the development of diarrhea in pigs. B. hyodysenteriae is still a common cause of diarrhea among pigs from Polish herds.

scholarly journals Detection of Swine Dysentery (SD) caused by Brachyspira hyodysenteriae via PCR in Northern Vietnam

2021 ◽  
Vol 4 (3) ◽  
pp. 1109-1116
Author(s):  
Nguyen Thi Thu Hang ◽  
Truong Quang Lam ◽  
Dao Le Anh ◽  
Nguyen Thi Hoa ◽  
Nguyen Thi Lan ◽  
...  
Keyword(s):  
Clinical Signs ◽  
Mesenteric Lymph Nodes ◽  
Swine Dysentery ◽  
Brachyspira Hyodysenteriae ◽  
Northern Vietnam ◽  
Hygiene Practices ◽  
Mesenteric Lymph ◽  
Gross Lesions ◽  
Pcr Method ◽  
Weaning Pigs

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%).

scholarly journals Changes in the expression of galanin and galanin receptors in the wall of the colon in pigs experimentally infected with Brachyspira hyodysenteriae

2014 ◽  
Vol 58 (1) ◽  
pp. 23-28 ◽  
Author(s):  
Krzysztof Wąsowicz ◽  
Piotr Podlasz ◽  
Małgorzata Chmielewska ◽  
Katarzyna Łosiewicz ◽  
Jerzy Kaleczyc ◽  
...  
Keyword(s):  
Real Time ◽  
Real Time Pcr ◽  
Experimental Colitis ◽  
Expression Level ◽  
Colonic Wall ◽  
Brachyspira Hyodysenteriae ◽  
Expression Levels ◽  
Gapdh Expression ◽  
Galanin Receptors ◽  
Different Levels

Abstract The expression of galanin (GAL) and its three receptors (GalR1, GalR2, and GalR3) were studied with real-time PCR in the colonic wall of pigs suffering from experimental colitis caused by the infection with Brachyspira hyodysenteriae. The expression was studied in the muscular membrane, mucosa/submucosa layer, and in lymphocytes isolated from mucosa/submucosa. The expression levels were normalized to glyceraldehyde-6-phosphate dehydrogenase (GAPDH) expression and compared to expression levels in control animals. GAL expression was found in all three studied compartments of the colonic wall. A significant decrease in GAL expression level was found in the mucosa/submucosa and in isolated lymphocytes, whereas the decrease was much less profound in the muscular membrane. In the case of galanin receptors their expression was found in all studied compartments of the colonic wall, however at different levels, as compared to GAPDH expression. The decrease of galanin receptors expression was found in all studied compartments of the colonic wall of the sick animals.

Serologic detection ofBrachyspira (Serpulina) hyodysenteriaeinfections

2001 ◽  
Vol 2 (1) ◽  
pp. 45-52 ◽  
Author(s):  
T. La ◽  
D.J. Hampson
Keyword(s):  
Cross Reactivity ◽  
Whole Cell ◽  
Brachyspira Hyodysenteriae ◽  
Serologic Tests ◽  
Cell Surface Structures ◽  
Outer Membrane Lipoprotein ◽  
Membrane Lipoprotein ◽  
Different Strains ◽  
Serologic Assay ◽  
Important Disease

AbstractSwine dysentery (SD) caused by the intestinal spirocheteBrachyspira hyodysenteriaeis an economically important disease in pig-producing countries throughout the world. To date, no specific serologic assay is commercially available for the diagnosis of pigs with SD. Several serologic techniques have been identified in the past; however, these tests have all used either whole-cell proteins or lipopolysaccharide (LPS) as the antigen. Whole-cell antigens are plagued with false-positive reactions due to cross-reactivity with common proteins shared with other spirochetes. LPS antigens produce fewer false-positives; however, false-negatives may result due to LPS components being serogroup-specific. Generally, these techniques are useful for detecting infected herds, but are unreliable for the detection of individual infected pigs. In order to develop improved serologic tests it will be necessary to identify suitable diagnostic antigens, in particular immunogenic cell-surface structures which are specific toB. hyodysenteriaebut common amongst different strains of the species. Recently, we identified and cloned a 30-kDa outer membrane lipoprotein (BmpB) which is specific toB. hyodysenteriaeand is recognized by experimentally and naturally infected pigs. In this review we summarize the available serologic tests for SD, and speculate on the use of recombinant BmpB as an antigen for future development of an improved serologic test for SD diagnosis.

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