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  • Title: Cytologic identification of Toxoplasma gondii in bronchoalveolar lavage fluid of experimentally infected cats.
    Author: Hawkins EC, Davidson MG, Meuten DJ, Rottman JB, Kennedy-Stoskopf S, Levy JK, Ritchey JW, Cullins LD, Tompkins MB.
    Journal: J Am Vet Med Assoc; 1997 Mar 01; 210(5):648-50. PubMed ID: 9054992.
    Abstract:
    OBJECTIVE: To determine whether it was possible to retrieve organisms, by means of bronchoalveolar lavage (BAL), from cats inoculated with Toxoplasma gondii. DESIGN: Experimental study. ANIMALS: 27 cats. Sixteen of the 27 were experimentally infected with feline immunodeficiency virus. PROCEDURE: All cats were inoculated with T gondii tachyzoites. Cats were grouped on the basis of feline immunodeficiency virus status and route (IV or intra-arterial) and number of tachyzoites administered. Bronchoalveolar lavage was performed by means of a standard technique. Lavage fluid was evaluated cytologically for tachyzoites. RESULTS: Clinical signs of toxoplasmosis varied widely among individual cats, but were generally most pronounced in group-1 and -2 cats (n = 5 each) and less pronounced in group-3 (n = 5) cats. Group-4 and -5 cats (n = 6 each) did not have clinical signs of toxoplasmosis. In 14 of the 15 cats in groups 1, 2, and 3, tachyzoites were detected in BAL fluid collected 7 days after inoculation. Tachyzoites were detected 14 days after inoculation in the single cat without tachyzoites 7 days after inoculation. A necropsy was performed on 9 of these cats, and tachyzoites were identified histologically in 4 of the 9. Tachyzoites were not detected in BAL fluid collected 3 days (n = 6) or 7 days (n = 6) after inoculation from the 12 cats in groups 4 and 5. Tachyzoites were not identified histologically in any of these 12 cats. CLINICAL IMPLICATIONS: BAL may be useful in the diagnosis of toxoplasmosis, particularly in cats with signs of pulmonary involvement.
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