PMID- 17635552 OWN - NLM STAT- MEDLINE DCOM- 20070913 LR - 20220408 IS - 1462-2912 (Print) IS - 1462-2912 (Linking) VI - 9 IP - 8 DP - 2007 Aug TI - Fluorescence in situ hybridization analysis of hindgut bacteria associated with the development of equine laminitis. PG - 2090-100 AB - Carbohydrate-induced laminitis in horses is characterized by marked changes in the composition of the hindgut microbiota, from a predominantly Gram-negative population to one dominated by Gram-positive bacteria. The objective of this study was to monitor changes in the relative abundance of selected hindgut bacteria that have previously been implicated in the pathophysiology of equine laminitis using fluorescence in situ hybridization (FISH). Caecal cannulae were surgically implanted in five Standardbred horses and laminitis induced by oral administration of a bolus dose of oligofructose. Caecal fluid and faecal specimens were collected over a 48 h period at 2 to 4 h intervals post-oligofructose administration and subjected to FISH using probes specific for nine bacterial groups to determine changes in their relative abundance compared with total bacteria hybridizing to the generic EUBMIX probe. Additionally, hoof biopsies were taken over the course of the experiment at 6 h intervals and evaluated for histopathological changes consistent with laminitis, allowing changes in hindgut microbiota to be correlated with the onset of lesions in the foot. Of the microorganisms specifically targeted, streptococci of the Streptococcus bovis/equinus complex were the only bacteria that consistently proliferated in both caecal fluid and faeces immediately before the onset of histological signs of laminitis. Furthermore, lactobacilli, Enterobacteriaceae, Allisonella histaminiformans, enterococci, Bacteroides fragilis, Mitsuokella jalaludinii and Clostridium difficile did not establish significant populations in the hindgut before the onset of equine laminitis. FAU - Milinovich, Gabriel J AU - Milinovich GJ AD - Australian Equine Laminitis Research Unit, School of Veterinary Science, The University of Queensland, Brisbane, Qld, Australia. g.milinovich@uq.edu.au FAU - Trott, Darren J AU - Trott DJ FAU - Burrell, Paul C AU - Burrell PC FAU - Croser, Emma L AU - Croser EL FAU - Al Jassim, Rafat A M AU - Al Jassim RA FAU - Morton, John M AU - Morton JM FAU - van Eps, Andrew W AU - van Eps AW FAU - Pollitt, Christopher C AU - Pollitt CC LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Environ Microbiol JT - Environmental microbiology JID - 100883692 RN - 0 (Oligosaccharides) RN - 0 (oligofructose) SB - IM MH - Animals MH - Bacteria/classification/*isolation & purification MH - Cecum/*microbiology MH - Feces/microbiology MH - Foot Diseases/chemically induced/microbiology/pathology/*veterinary MH - Hoof and Claw/pathology MH - Horse Diseases/chemically induced/*microbiology/pathology MH - Horses MH - In Situ Hybridization, Fluorescence MH - Oligosaccharides EDAT- 2007/07/20 09:00 MHDA- 2007/09/14 09:00 CRDT- 2007/07/20 09:00 PHST- 2007/07/20 09:00 [pubmed] PHST- 2007/09/14 09:00 [medline] PHST- 2007/07/20 09:00 [entrez] AID - EMI1327 [pii] AID - 10.1111/j.1462-2920.2007.01327.x [doi] PST - ppublish SO - Environ Microbiol. 2007 Aug;9(8):2090-100. doi: 10.1111/j.1462-2920.2007.01327.x.