03078naa a2200517 a 450000100080000000500110000800800410001902400550006010000200011524501080013526000090024350000250025252016030027765000110188065000130189165000100190465000310191465000180194565000100196365000150197365000130198865000170200165000190201865000160203765000120205365000250206565000290209065000150211965000230213465000180215765300110217565300380218665300230222465300310224765300320227865300250231065300150233565300200235065300180237070000210238870000200240970000200242970000190244970000250246877300670249315153782023-08-17       2000    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.1016/S0304-4017(99)00207-12DOI1 aCOSTA, C. A. F.  aVariability of resistance in goats infected with Haemonchus contortus in Brazil.h[electronic resource]  c2000  aShort communication.  aAbstract: The variability between and within breeds with respect to nematode egg counts (EPG), packed cell volume (PCV) and hemoglobin (Hb) was studied in 36 yearling female goats of the Caninde (15), Bhuj (6) and Anglo-Nubian (15) breeds, exposed to Haemonchus contortus. Nematode-free goats were turned to a contaminated paddock in late February. From then on, fecal egg per gram counts (EPG), packed cell volume (PCV) and hemoglobin (Hb) were determined at 2-week intervals up toWeek 18. The EPG, transformed as [log(EPGC75)], varied (P&lt0.01) between goats within breeds and between weeks of exposure, but not between goat breeds (P &gt 0.05). PCV and Hb were affected by goat breeds (P&lt0.05), by goats within breeds (P&lt0.01) and by weeks of exposure (P&lt0.01). Anglo-Nubians had higher (P&lt0.01) PCV and Hb than Caninde; Bhuj had intermediate values. There were two EPG rises; one betweenWeeks 6 and 10 and the other betweenWeeks 14 and 16. The within breed variability was marked during the EPG rise on Week 6, when individual egg counts ranged from 130 to 2500. The EPG rises coincided with drops in Hb. PCV presented a similar trend, though not as marked. Haemonchus was responsible for more than 95% of nematode eggs counted. Considering the goat as experimental unit, the correlation coefficients (r) were: ?0.45, PD0.0064, between log(EPGC75) and PCV; and ?0.53, PD0.0009, between log(EPG C75) and Hb. The negative correlation between egg counts and blood values suggested breed differences in PCV and Hb were related to resistance to H. contortus infection and/or to its effects.  aBrazil  aBreeding  aFeces  aGastrointestinal nematodes  aGoat diseases  aGoats  aImmunology  aNematoda  aParasitology  aSemiarid zones  aVariability  aCaprino  aHaemonchus Contortus  aHelminto gastrintestinal  aNematóide  aParasito de Animal  aParasitologia  aBrasil  aGenetic predisposition to disease  aNatural resistance  aNematódeo gastrintestinal  aResistance to anthelmintics  aResistência natural  aSemiárido  aTherapeutic use  aVariabilidade1 aVIEIRA, L. da S.1 aBERNE, M. E. A.1 aSILVA, M. U. D.1 aGUIDONI, A. L.1 aFIGUEIREDO, E. A. P.  tVeterinary Parasitologygv. 88, n. 1/2, p. 153-158, Feb. 2000.