Document Detail


Microscopic alterations in jejunal epithelium of 3-week-old pigs induced by pig-specific, mouse-negative, heat-stable Escherichia coli enterotoxin.
MedLine Citation:
PMID:  3516028     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The objective of this study was to determine whether exposure of swine jejunum to crude culture filtrates containing Escherichia coli pig-specific, mouse-negative, heat-stable enterotoxin (STb) induces structural alterations in the jejunal mucosa of pigs. Two ligated intestinal loops in each of twelve 3-week-old pigs were exposed for 2 hours to sterile E coli culture filtrates from each of the following strains: 431 (STa-producing), 1261 (STa and STb-producing), and 1790 (STb-producing); recombinant strain HB101-pRAS-1 (STb-producing); the nontoxigenic K-12 variant HB101; or trypticase soy broth. Formalin-fixed sections from these loops were examined for sloughed cells around villi, and a lesion score was determined, indicating a change in villous epithelium from columnar to cuboidal or squamous cell types or to discontinuous epithelium. Villous lengths and crypt depths also were determined. For loops exposed to culture filtrates containing STa and STb or containing only STb, lesion scores and numbers of sloughed cells were greater (P less than 0.05) and villous length was shorter (P less than 0.01) than in loops not exposed to toxin. For loops exposed to culture filtrates containing STa, lesion scores, villus lengths, and numbers of sloughed cells were not different from those of loops not exposed to toxin. Therefore, exposure of swine jejunum to STb induced structural alterations in intestinal mucosa (ie, loss of villous absorptive cells and partial atrophy of villi) that were consistent with those causing compromised absorptive capacity.
Authors:
S C Whipp; S L Moseley; H W Moon
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  American journal of veterinary research     Volume:  47     ISSN:  0002-9645     ISO Abbreviation:  Am. J. Vet. Res.     Publication Date:  1986 Mar 
Date Detail:
Created Date:  1986-05-15     Completed Date:  1986-05-15     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  0375011     Medline TA:  Am J Vet Res     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  615-8     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Animals
Bacterial Toxins / toxicity*
Enterotoxins / toxicity*
Epithelial Cells
Epithelium / drug effects
Escherichia coli / isolation & purification
Jejunum / drug effects,  pathology*
Mice
Microvilli / ultrastructure
Swine
Chemical
Reg. No./Substance:
0/Bacterial Toxins; 0/Enterotoxins; 0/heat stable toxin (E coli)

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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