Impact of Mastitis Incidence during Early Postpartum on Reproductive Efficiency, Antioxidant Status, Hormonal Profile, and Trace Elements in Lactating Egyptian Buffaloes
Impact of Mastitis Incidence during Early Postpartum on Reproductive Efficiency, Antioxidant Status, Hormonal Profile, and Trace Elements in Lactating Egyptian Buffaloes
Mohamed Abd El-Fattah Abo-Farw1, Maged Ahmed Aboul-Omran1, Abdel-Khalek El-Sayed Abdel-Khalek2*
ABSTRACT
This study aimed to determine the influence of early postpartum clinical mastitis on the reproductive performance, antioxidant, hormonal profile and trace elements in Egyptian buffaloes. A total of 90 multiparous lactating Egyptian buffaloes (500-600 kg live body weight, 5-7 years old, 3-5 parities, and 10.75 ± 2.66 kg/day milk yield were used in this study. The buffaloes were managed and feed at similar traditional conditions. Mastitis diagnosis was performed 21 days after calving, then animals (n=90) were grouped to normal (n= 75), and clinical mastitis (n=15) groups. Results show that interval from calving to first estrus (31.60±0.86 vs. 33.10±0.98 d) or first service (55.20±0.97 vs. 61.00±1.96) was not affected (P≥0.05). Mastitis decreased (P<0.05) estrus/mating (93.3 vs. 80.0%) and pregnancy rates (86.66 vs. 53.33%), prolonged (P<0.001) days open (63.45±3.25 vs. 104.10±3.92 d), and increased services number required for conception (1.35±0.11 vs. 2.800±0.25 services). Mastitis decreased (P<0.0001) reduced glutathione (5.66±0.182 vs. 4.71±0.302 mmol/l) and total antioxidant capacity (1.64±0.046 vs. 0.76±0.049 mmol/l), and increased (P<0.0001) in malondialdehyde (0.80±0.043 vs. 1.68±0.064 mmol/ml). Mastitis significantly decreased serum concentration of progesterone (P4), estrogen (E2), thyroxin (T4), zinc (Zn), and selenium (Se) by about 24.05, 13.80, 5.36, 2.50, and 3.44%, respectively, while triiodothyronine (T3) concentration showed non-significant decrease by about 3.77%. Mastitis incidence at early postpartum in lactating Egyptian buffaloes delayed the resumption of estrous and ovarian activity and decreased pregnancy rate, antioxidant status, thyroid and reproductive hormones and trace elements such as Zn and Se.
Keywords | Mastitis, Buffaloes, Pregnancy rate, Antioxidant, Trace elements.
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