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Clotrimazole, ketoconazole, and clodinafop-propargyl inhibit the in vitro growth of Babesia bigemina and Babesia bovis (Phylum Apicomplexa)

Published online by Cambridge University Press:  17 October 2003

S. BORK ,
N. YOKOYAMA ,
T. MATSUO ,
F. G. CLAVERIA ,
K. FUJISAKI  and
I. IGARASHI
S. BORK
Affiliation:
National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido 080-8555, Japan
N. YOKOYAMA
Affiliation:
National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido 080-8555, Japan
T. MATSUO
Affiliation:
National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido 080-8555, Japan
F. G. CLAVERIA
Affiliation:
National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido 080-8555, Japan Biology Department, College of Science, De La Salle University-Manila, Taft Avenue, Manila, Philippines
K. FUJISAKI
Affiliation:
National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido 080-8555, Japan
I. IGARASHI
Affiliation:
National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido 080-8555, Japan
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Abstract

We evaluated the growth inhibitory efficacy of the imidazole derivatives, clotrimazole (CLT) and ketoconazole (KC), and the herbicide clodinafop-propargyl (CP), in in vitro cultures of Babesia bovis and B. bigemina. Clotrimazole was effective in a dose range of 15 to 60 μM (IC50: 11 and 23·5 μM), followed by KC (50 to 100 μM; IC50: 50 and 32 μM) and CP (500 μM; IC50: 265 and 390 μM). In transmission electron microscopy, extensive damage was observed in the cytoplasm of drug-treated parasites. Combinations of CLT/KC, CLT/CP and CLT/KC/CP acted synergistically in both parasites. In contrast, the combination of KC/CP was exclusively effective in B. bovis, but not in B. bigemina.

Keywords

bovine babesiosisclotrimazoleketoconazoleclodinafop-propargylin vitro culturegrowth inhibition
Type
Research Article
Information
Parasitology , Volume 127 , Issue 4 , October 2003 , pp. 311 - 315
Copyright
2003 Cambridge University Press

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