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Effect of eperythrozoon ovis infection on the reductive potential of sheep erythrocytes






Veterinary Parasitology 5(1): 11-16

Effect of eperythrozoon ovis infection on the reductive potential of sheep erythrocytes

Reduced glutathione (GSH) and methemoglobin were measured in sheep blood during an infection cycle of E. ovis and in uninfected control blood. The GSH levels in infected erythrocytes were significantly lower in the latter half of the infection cycle. Incubation with acetylphenylhydrazine (APH) resulted in negligible levels in infected cells whereas control cells were approximately 45% normal. Infection with E. ovis had little effect on methemoglobin levels. Incubation with APH caused a marked increase of the methemoglobin levels in infected and control blood; the control methemoglobin levels were significantly higher. E. ovis apparently interfered with maintenance of GSH erythrocytes to an extent that when challenged with an oxidizing chemical, erythrocyte membrane integrity could be lost. E. ovis probably provided some protection against oxidative damage for the heme portion of the Hb molecule or the amount of oxidative damage to Hb was further advanced in the infected cells.

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Accession: 005236406

DOI: 10.1016/0304-4017(79)90035-9



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