Suárez Víctor H, Lifschitz Adrián L, Sallovitz Juan M, Lanusse Carlos E
Estación Experimental Agropecuaria Anguil, INTA, CC 11, Anguil, La Pampa, Argentina.
Ecotoxicol Environ Saf. 2009 Jul;72(5):1551-8. doi: 10.1016/j.ecoenv.2007.11.009. Epub 2008 Jan 14.
Dung invertebrate colonization and degradation levels of faeces from cattle treated with endectocides were studied. Faeces of control and doramectin (DRM) (subcutaneous) and moxidectin (MXD) (subcutaneous and topical) treated animals were deposited on the field from 3 to 21 days post-treatment (pt). Pats were recovered after 6 to 42 days post-deposition (pd). Faecal weight, dry matter, arthropods number, and drugs concentrations were determined. Total arthropods number was higher in control (P<0.0001) than in the other groups from days 3 to 21 pt. Total number of insects recovered on days 3, 11, and 21 pt from control pats was significantly (P<0.001) higher than in treated-animal pats during all the trial. At day 21 pt, the insects' number in dung voided by DRM-treated cattle was (P<0.05) lower than in the other groups. Comparisons of dung degradation among treatments were inconclusive. A lower adverse effect was observed for MXD compared with DRM. No significant degradation of MXD or DRM was observed during the present trial.
研究了用体内外寄生虫药处理过的牛粪便中无脊椎动物的定殖情况和粪便降解水平。在处理后3至21天（pt），将对照动物以及皮下注射多拉菌素（DRM）和皮下及局部使用莫昔克丁（MXD）处理的动物的粪便放置在田间。在粪便放置后6至42天（pd）回收粪堆。测定了粪便重量、干物质、节肢动物数量和药物浓度。在处理后3至21天，对照粪堆中的节肢动物总数高于其他组（P<0.0001）。在整个试验期间，在处理后第3、11和21天从对照粪堆中回收的昆虫总数显著高于处理动物的粪堆（P<0.001）。在处理后第21天，用DRM处理的牛排出的粪便中的昆虫数量低于其他组（P<0.05）。各处理间粪便降解的比较尚无定论。与DRM相比，观察到MXD的不良影响较小。在本试验期间，未观察到MXD或DRM有显著降解。
