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Related Experiment Videos

Bovine abortion associated with Anaplasma marginale.

W M Correa, C N Correa, A F Gottschalk

    Canadian Journal of Comparative Medicine : Revue Canadienne De Medecine Comparee
    |April 1, 1978
    PubMed
    Summary

    Anaplasma marginale was identified in Brazilian bovine fetuses from brucellosis-free herds. This finding highlights potential vertical transmission of Anaplasmosis in cattle.

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    Area of Science:

    • Veterinary Pathology
    • Parasitology
    • Bovine Medicine

    Background:

    • Anaplasmosis is a significant tick-borne disease affecting cattle worldwide.
    • Understanding transmission routes, including potential vertical transmission, is crucial for disease control.
    • Previous studies on bovine fetal anaplasmosis in Brazil are limited.

    Purpose of the Study:

    • To investigate the presence and pathological findings of Anaplasma marginale in bovine fetuses from Brazil.
    • To determine if Anaplasma marginale can be detected in fetuses from brucellosis-free herds.

    Main Methods:

    • Necropsy of five bovine fetuses (7-9 months gestation) from brucellosis-free herds.
    • Histopathological examination of tissues.
    • Microscopic examination of cardiac blood smears using Pappenheim's panoptic stain.
    • Detection of Anaplasma marginale using acridine orange and immunofluorescence.

    Main Results:

    • Gross necropsy revealed liver enlargement, splenic congestion, and petechial hemorrhages in multiple fetuses.
    • Anaplasma marginale was identified in 2-20% of red blood cells in cardiac blood smears from all fetuses.
    • Acridine orange and immunofluorescence confirmed Anaplasma marginale in the initial fetus examined.

    Conclusions:

    • Anaplasma marginale infection was confirmed in Brazilian bovine fetuses.
    • The presence of the parasite in fetuses from brucellosis-free herds suggests a potential for vertical transmission.
    • Further research is warranted to elucidate the role of vertical transmission in bovine anaplasmosis epidemiology.

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