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Brucellosis is an important disease of public health significance that leads to severe losses. The current study was carried out to identify the recovered Brucella species , and its prevalence in cows and ewes in Dakahlia and Damietta Governorates during May 2018 to March 2019, with the hemato-biochemical analyses in the positive cases. In the current study, B. melitensis biovar 3 was identified with a total prevalence of 8.75% and 6.98% in cows and ewes, respectively. Hematological results denoted a normocytic normochromic anemia in infected cows and ewes at the 2 nd and 4 th weeks after abortion group (GP) 2 and GP.3, respectively, with leucocytosis especially in GP.3. Significant hypoproteinemia and hypoalbuminemia were detected in infected cows at the 2 nd week after abortion, with non-significant changes at 4 th week after abortion. While Brucellosis-infected ewes showed a significant (P < 0.05) hypoproteinemia and hypoalbuminemia at both 2 nd and 4 th weeks post abortion. The serum AST, ALT, ALP and LDH activities and levels of IL-6 and TNF-α were markedly elevated (P < 0.05) in both infected cow and ewes with markedly lowered serum urea level. Whereas serum glucose level was significantly decreased (P < 0.05) in infected cows (GPs 2 and 3), as well as, infected ewes of GP. 2, with non-significant changes in infected ewes of GP3. The serum creatinine level showed non-significant changes in all infected cows and ewes. Serum immunoglobulin M was significantly increased in both infected cows and ewes of GPs 2 and 3, while immunoglobulin G was significantly elevated in both infected cow and ewes of GP3. Moreover, phagocytic percent and index showed a significant decrease in both infected cows and ewes (GPs2 and 3). Thus, evaluations of hematological, biochemical and immunological parameters together with specific diagnostic tests are necessary to obtain more reliable results for the diagnosis of Brucellosis in cows and ewes.

Nigella sativa oil (NSO) possesses antioxidant activity. However, its protective role against the hazards of fungicides has been poorly studied. Therefore, the present work aimed at determining the ameliorative potential of NSO against hepatotoxicity induced by carbendazim (CBZ) and/or mancozeb (MNZ) in female rats. In the present study, about 120 adult female Sprague-Dawley rats were randomly divided into eight equal groups. One group of animals was kept as a negative control (Gp. 1); groups 2, 3 and 4 orally received CBZ (200 mg/kg body wt) and/or MNZ (300 mg/kg body wt) daily for 2 weeks (positive groups). In order to assess the hepatoprotective potential of NSO, in comparison with NSO-treated rats (Gp. 5), groups 6, 7 and 8 were CBZ- and/or MNZ-exposed groups pre-treated orally with NSO (2 ml/kg body wt) daily for 2 weeks (prophylactic groups). All groups were kept further for 15 days without medications to observe the withdrawal effect. At the end of exposure and withdrawal periods, the body weight of all experimental rats was recorded and blood samples were collected for hematological, clinico-biochemical, and micronucleus assays. The animals were then sacrificed, and the liver and bone marrow were harvested for oxidative stress bioassay, chromosomal aberrations, DNA fragmentation, and histopathological examinations. The results suggested that pre-treatment with NSO remarkably diminished CBZ- and MNZ-induced macrocytic hypochromic anemia, leukocytosis, lymphocytosis, eosinophilia, and neutropenia. Besides, it also minimized the elevated liver enzymes, lipid peroxidation, micronucleus incidence, DNA damage, and chromosomal aberration frequency. Conversely, NSO significantly stimulated the CBZ- and/or MNZ-induced antioxidant system suppression. The NSO also normalized the hepatic structural architecture. As far as withdrawal effect is concerned, there was almost disappearance of the bad effects of these fungicides and the values were close to the normal range especially with the use of NSO. Ultimately, the results revealed that N. sativa oil is an effective hepatoprotective agent due to its genoprotective and free radical scavenging activities.

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