A parasitological study was undertaken to determine the health status of 15 mouse and 10 rat colonies bred in 18 Brazilian laboratory animal houses maintained under different sanitary barrier conditions which supply animals for teaching. research purposes and manufacture of biological products for medical or veterinary use. Parasitological methods were used for diagnosis of mites. lices. https://safeersappliancers.shop/product-category/rangemaster-lsk90dffss-c-longstock-dual-fuel-cooker-90cm/