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  • Title: Anti-Dirofilaria immitis antibody levels before and after anthelmintic treatment of experimentally infected dogs.
    Author: Grieve RB, Knight DH.
    Journal: J Parasitol; 1985 Feb; 71(1):56-61. PubMed ID: 3981349.
    Abstract:
    Antibody to Dirofilaria immitis was measured in 6 dogs before and after treatment with thiacetarsamide. Antibody to microfilarial surface antigens was ascertained with an indirect fluorescent antibody assay (IFA). Various patterns of the production, or presence, of antibody to microfilarial surface antigens were observed. There was no apparent relationship between IFA results and adulticide success. Antibody to adult worm antigen was measured with an enzyme-linked immunosorbent assay (ELISA). ELISA titers increased following infection and decreased transiently at the end of the prepatent period. A marked increase in ELISA titers was noted in all dogs subsequent to an initial thiacetarsamide treatment. In general, ELISA titers returned to low levels in dogs which were successfully treated; however, in dogs with persistent infections or infections which apparently necessitated 2 adulticide treatments ELISA titers remained at pre-treatment levels during the period of observation. Since ELISA titers appeared to decrease to pre-infection levels in successfully treated dogs, the assay should have utility in subsequent antibody determinations and may permit retrospective prediction of chemotherapeutic success.
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