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To develop a environment friendly control measure against cattle tick, Rhipicephalus (Boophilus) microplus, medicinally important plants were identified and extracts were prepared. Twelve 95% ethanolic, thirteen 50% hydroethanolic and nine hot water extracts were prepared and tested against laboratory reared homogenous colony of R. (B.) microplus. Amongst the 34 extracts, 26 extracts showed no mortality...
Abstract An extrachromosomal circular DNA of approximately 50-kb size was amplified in the hydroxyurea-resistant variant of Leishmania mexicana amazonensis. The amplicon carried the M2 gene of ribonucleotide reductase as part of the gene encoding resistance to hydroxyurea. The amplicon was unstable. It disappeared rapidly as shown in pulse-field gradient electrophoresis gels after reversion of the...
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