Given the fact that numerous microbial species can be detected in pregnant female dogs, the objective of this study was to assess the transplacental transmission of Brucella canis, Ehrlichia canis, Neospora caninum and Toxoplasma gondii in stillborn puppies. This study involved 41 stillborn puppies, 78.6% of which were positive for T. gondii, 52.4% for N. caninum and 59.5% for B. canis. E. canis was not detected in any of the analyzed puppies. Pregnancy is an important physiological condition for the transmission of infectious agents to puppies and transplacental transmission may be epidemiologically relevant in the spread of these opportunistic agents.
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