| prevalence of cooperia punctata, c. pectinata and c. oncophora infections in dairy calves in brazil. | cooperia is the most prevalent helminth parasitizing calves in brazil. three species of this genus occur most often: c. punctata, c. pectinata and c. oncophora. six calves from dairy farms in the south of the state of minas gerais aged six to 15 months were killed and necropsied each month over a period of two years. the cooperia species were identified, counted, and the numbers related to the calves' age. the worm burdens due to the three species of cooperia were statistically different. c. pun ... | 1990 | 2283473 |
| anthelmintic resistance in a dairy cattle farm in the state of minas gerais. | eighty-four half-blood gir +ù holstein (f1) calves aged six months who were naturally infected by gastrointestinal helminths and maintained in rotational grazing received different anthelmintic treatments. group a received anthelmintics according to the usual management in the property (eight treatments, seven including a macrocyclic lactone agent). group b received strategic treatment (ivermectin 3.15%) at the beginning and at the end of the rainy period. eggs per gram of feces (epg) counts and ... | 2011 | 21722485 |
| seasonal infection pattern of gastrointestinal nematodes of beef cattle in minas gerais state--brazil. | tracer calves were used to assess the seasonality of infections of gastrointestinal parasites in beef cattle extensively raised at a farm in the state of minas gerais, brazil. tracer calves acquired infections during all months of the year, however, highest worm burdens were observed in the rainy season. the following nematode species were recovered from tracer calves: cooperia punctata, c. spatulata, c. pectinata, haemonchus similis, h. placei, oesophagostomum radiatum, trichostrongylus colubri ... | 1998 | 9561708 |