Abstract: A total of 50 does were used to determine selected hematological and biochemical parameters with special references to oxidative stress markers, acute phase protein profiles, and proinflammatory cytokines in healthy and gangrenous mastitis affected does. Animals were divided into two equal groups represented as clinically healthy (control) and diseased groups, respectively. The bacteriological examination of milk samples from diseased does revealed many types of bacterial infection. The isolated bacteria were Staphylococcus aureus (N=23/25), Escherichia coli (N=11/25), and Clostridium perfringens (N=4/25). There was a significant increase in the levels of β-hydroxybutyrate, non-esterified free fatty acids, triglyceride, low density lipoprotein cholesterol (LDL-C), aspartate aminotransferase, and alanine aminotransferase and a significant reduction in the levels of glucose, cholesterol, and high density lipoprotein cholesterol (HDL-C) in does with gangrenous mastitis compared to healthy does. Moreover, there was a significant increase in the levels of malondialdehyde and uric acid with a significant decrease in the levels of reduced glutathione, super oxide dismutase, and catalase in does with gangrenous mastitis compared to healthy does. In addition, there was a significant increase in the haptoglobin, serum amyloid A, fibrinogen, interleukin 6 (IL-6), IL-1β, and tumor necrosis factor-α (TNF-α) in does with gangrenous mastitis compared to healthy ones. Conclusively, oxidative stress biomarkers, acute phase proteins, and proinflammatory cytokines play an essential task as biomarkers for gangrenous mastitis in does. Mastitis may be considered as one of the ketotic stressors in does after parturition.

Key words: Haptoglobin, Serum amyloid A, Malondialdehyde, Interleukin 1β, Interleukin 6, Tumor necrosis factor-α

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