Document Detail

Experimental infection of pregnant cows with Bacillus licheniformis bacteria.
MedLine Citation:
PMID:  10332827     Owner:  NLM     Status:  MEDLINE    
To study the abortifacient potential and fetoplacental tropism of Bacillus licheniformis bacteria, eight cows in the sixth to eighth month of gestation were inoculated intravenously either once (n = 4) or on four successive days (n = 4) with B. licheniformis at doses ranging from 10(9) to 10(12) colony-forming units. Cows were euthanatized and necropsied prior to abortion (n = 2), at the time of abortion (n = 2), or at calving (n = 4). Live-born calves (n = 5) were euthanatized immediately after delivery and necropsied. B. licheniformis was reisolated from placentomes/endometrium in six of eight (75%) cows and from one fetus aborted 43 days after inoculation. Lesions associated with B. licheniformis were restricted to the pregnant uterus, with the exception of one cow, which developed pneumonia. Necrosis in the fetal compartment of the placenta were present in three of four (75%) cows of both inoculation groups. Lesions were mainly restricted to fetal membranes and especially to the fetal side of the placentomes. Necrosis and diffuse neutrophil infiltrations of both villi and intervillous areas occurred in the fetal part of the placenta, and the placentomal interface was distended by bacteria, neutrophils, erythrocytes, and debris. Within trophoblasts, bacteria were located both free in the cytoplasm and in cytoplasmatic vesicles. Inflammation was present in three of eight (38%) calves. Placental and fetal lesions were similar to those found in cases of spontaneous abortions associated with B. licheniformis. The abortifacient potential of B. licheniformis and the tropism for the bovine placenta is demonstrated here for the first time.
J S Agerholm; N E Jensen; V Dantzer; H E Jensen; F M Aarestrup
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Veterinary pathology     Volume:  36     ISSN:  0300-9858     ISO Abbreviation:  Vet. Pathol.     Publication Date:  1999 May 
Date Detail:
Created Date:  1999-08-03     Completed Date:  1999-08-03     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0312020     Medline TA:  Vet Pathol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  191-201     Citation Subset:  IM    
Department of Pathology, Danish Veterinary Laboratory, Copenhagen, Denmark.
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MeSH Terms
Abortion, Veterinary / microbiology*
Animals, Newborn
Bacillaceae Infections / complications,  microbiology,  veterinary*
Bacillus / pathogenicity*
Bacteremia / veterinary
Cattle Diseases / microbiology*
Leukocyte Count / veterinary
Microscopy, Electron / veterinary
Placenta / microbiology,  pathology
Trophoblasts / microbiology,  pathology

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

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