Pharmacokinetics and therapeutic efficacy of levamisole in Ascaridia galli experimentally infected ducks
Mohaddeseh Abouhosseini Tabari; Błażej Poźniak; Seyedeh Talayeh Mostafavi Niaki; Alireza Salehi; Mohammad Reza Youssefi
Veterinary Parasitology
Ministerial score = 140.0
Journal Impact Factor (2022) = 2.821 (Q1)
This study investigated the pharmacokinetics and therapeutic efficacy of levamisole (LVS) after intravenous (i.v.) and oral administrations to healthy and Ascaridia galli-infected ducks by developing an infection model. Twenty-four two-week old ducklings were experimentally infected with A. galli. The ducks were monitored for the development of infection and after 8 weeks they were administered with LVS at a single dose of 30 mg/kg by oral or i.v. administration. Sixteen healthy ducks were subjected to the same treatment and served as control. Serial blood samples were taken for LVS determination with HPLC-UV and pharmacokinetic analysis was carried out based on the non-compartmental approach. The LVS therapeutic efficacy was determined 1 week post drug administration by intestinal worm count at necropsy. In vivo data on development of ascariasis in ducks showed that 8 weeks post inoculation the number of eggs per gram of feces reached at least 100 in each bird. After a single dose of LVS, no parasites were recovered upon necropsy. Results of the pharmacokinetic study showed no statistical differences between infected and non-infected birds for both routes of administration. The mean oral bioavailability was slightly below 50% in both experimental groups. In conclusion, the pharmacokinetics of LVS in ducks was not affected by experimentally-induced ascariasis. A single dose of LVS was found to be efficient against experimental ascariasis in ducks induced by in field isolates of A. galli.
DOI:10.1016/j.vetpar.2022.109838
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