EFFECTS OF VARYING LEVELS OF HAEMONCHUS INFECTION ON SOME HAEMATOLOGICAL AND BIOCHEMICAL PARAMETERS OF SHEEP DURING THE DRY SEASON

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dc.contributor.authorCHIEZEY, NGOZI P.
dc.date.accessioned2014-11-10T08:06:36Z
dc.date.available2014-11-10T08:06:36Z
dc.date.issued1985-10
dc.descriptionA THESIS SUBMITTED TO THE POST-GRADUATE SCHOOL, AHMADU BELLO UNIVERSITY, IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE, DEPARTMENT OF PARASITOLOGY AND • ENTOMOLOGY, FACULTY OF VETERINARY MEDICINE, AHMADU BELLO UNIVERSITY, ZARIA, NIGERIA. OCT. 1985en_US
dc.description.abstractThe effects of varying levels of Haemonchus spp on haematological and some serum parameters of sheep were investigated, Forty-seven experimental animals with ages ranging from 6 - 1 8 months, which had previously been exposed to infection were used. They were divided into four groups, I, II, III and IV each consisting of 12 animals with the exception of group IV with 11 animals. Groups I, II and III were innoculated with 35,000, 14,000 and 2,8000 Haemonchus infective larvae respectively while Group IV served as uninfected controls. Each animal was dosed in seven instalments spreading over seven days. The results of the experiment were evaluated on haematological, serum protein and serum electrolyte changes, faecal egg output and worm recovery over a 21 - week period. The sheep showed some resistance to experimental infections of up to 35,000 larvae - as was shown by their faecal helminth egg output and worm recovery data. All animals reacted in a similar pattern irrespective of dose given. Average nematode egg counts of each group did not reflect the level of initial larvae given and was below 4,000 eggs per gram in all infected animals. Animals with the lightest infections had the highest egg counts, cummulative mean values being 626, 982 and 1173 for Groups I, II and III respectively. Packed cell volume, haemoglobin concentrations erythrocyte and leucocyte counts as well as serum iron values did not show marked changes as a result of infection but the controls had higher mean haemoglobin concentrations and total mean serum iron values significantly higher than those of the infected groups. Differential white cell counts did not show significant changes but there was slight eosirohilia in infected animals. No abnormal changes in the total serum protein and serum protein fractions were detected as a result of the infection. However, values for the controls were higher than those of the infected but these differences were not statistically significant. Albumin values for Group I were significantly (P<0.05) lower than all other groups, values being 46.9 ± 6 . 6 , 49.1±4.9, 49.9±6.0 and 49.5±5.2 percent for Groups I, II, III and IV respectively. Group IV had significantly lower globulin values than any of the infected groups. Serum sodium and Potassium values did not show any discernable patterns but Group IV had lower sodium values than any of the infected groups while Potassium did not differ significantly between the groups. At necropsy, the worm burdens did not reflect the doses given and less than two percent of helminths given to each animal was recovered. Mean numbers of worms recovered in Groups I, II and III were 357, 175 and 48 respectively. No arrested larvae were recovered in all the infected groups.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/5585
dc.language.isoenen_US
dc.subjectVARYING,en_US
dc.subjectHAEMONCHUS,en_US
dc.subjectHAEMATOLOGICAL,en_US
dc.subjectBIOCHEMICAL,en_US
dc.subjectPARAMETERS,en_US
dc.subjectSHEEP,en_US
dc.subjectDRY SEASONen_US
dc.titleEFFECTS OF VARYING LEVELS OF HAEMONCHUS INFECTION ON SOME HAEMATOLOGICAL AND BIOCHEMICAL PARAMETERS OF SHEEP DURING THE DRY SEASONen_US
dc.typeThesisen_US
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