Relationship between season, lactation number and incidence of clinical mastitis in different stages of lactation in a Holstein dairy farm
محل انتشار: گفتمان پژوهش دامپزشکی، دوره: 5، شماره: 1
سال انتشار: 1393
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 44
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شناسه ملی سند علمی:
JR_VRFAN-5-1_003
تاریخ نمایه سازی: 25 آبان 1402
چکیده مقاله:
The aim of the present study was to compare the occurrence and duration of clinical mastitis in different seasons, stages of lactation period and parities in a Holstein dairy farm in Iran. A retrospective epidemiological survey from April ۲۰۰۵ to March ۲۰۰۸ was conducted on ۸۸۴ clinical mastitis cases of ۷۴۳۷ lactations. Data of each case including calendar-date of mastitis onset, days in milk (DIM) of mastitis onset (early: ۰-۷۴ DIM; middle: ۷۵-۱۵۰ DIM, and late ≥ ۱۵۰ DIM), duration of mastitis, and parity (۱, ۲, and ≥ ۳) were recorded. Based on date of mastitis onset, cases were classified into stages of lactation. Moreover, beginning of mastitis was seasonally categorized. Duration of clinical mastitis after treatment in early lactation was less than late lactation in the first-parity cows (p = ۰.۰۰۵). In early lactation period, the first-parity cows suffered clinical mastitis in days earlier than two other parity groups (p < ۰.۰۰۱). Moreover, in late lactation period, the first-parity cows had clinical mastitis in days later than cows in the third and more parities (p = ۰.۰۰۲). Occurrence of clinical mastitis in summer increased in late lactation period but in winter increased in early lactation period (p = ۰.۰۰۱). In addition, occurrence time of clinical mastitis in summer were in days later than in spring (p = ۰.۰۲) and winter (p = ۰.۰۳) in early lactation period. In conclusion, occurrence of mastitis in winter and spring during early lactation and in summer during late lactation period were more prevalent especially in lower parities.
کلیدواژه ها:
نویسندگان
Maede Moosavi
Department of Clinical Sciences, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
Abdolah Mirzaei
Department of Clinical Sciences, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
Mohsen Ghavami
Private Veterinary practitioner, Nemoneh Dairy Farm of Astan-e-Ghods, Mashhad, Iran
Amin Tamadon
Transgenic Technology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
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