Relationship between season, lactation number and incidence of clinical mastitis in different stages of lactation in a Holstein dairy farm

Relationship between season, lactation number and incidence of clinical mastitis in different stages of lactation in a Holstein dairy farm

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 2005 to March 2008 was conducted on 884 clinical mastitis cas...

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Bibliographic Details
Main Authors: Maede Moosavi, Abdolah Mirzaei, Mohsen Ghavami, Amin Tamadoد
Format: Article
Language:English
Published: Urmia University 2013-12-01
Series:Veterinary Research Forum
Subjects:
School of Veterinary Medicine
Shiraz University
Shiraz
Iran 2Private Veterinary practitioner
Nemoneh Dairy Farm of Astan-e-Ghods
Mashhad
Iran 3Transgenic Technology Research Center
Shiraz University of Medical Sciences
Iran Abstract 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 2005 to March 2008 was conducted on 884 clinical mastitis cases of 7437 lactations. Data of each case including calendar-date of mastitis onset
days in milk (DIM) of mastitis onset (early: 0-74 DIM; middle: 75-150 DIM
and late ≥ 150 DIM)
duration of mastitis
and parity (1
2
and ≥ 3) 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 = 0.005). In early lactation period
the first-parity cows suffered clinical mastitis in days earlier than two other parity groups (p < 0.001). Moreover
in late lactation period
the first-parity cows had clinical mastitis in days later than cows in the third and more parities (p = 0.002). Occurrence of clinical mastitis in summer increased in late lactation period but in winter increased in early lactation period (p = 0.001). In addition
occurrence time of clinical mastitis in summer were in days later than in spring (p = 0.02) and winter (p = 0.03) in early lactation period. In conclusion
Clinical mastitis; Dairy cow; Lactation; Season
Online Access:http://www.urmia.ac.ir/vrf/Shared%20Documents/pdf/vol-5%20no-1/13-19-0386.pdf

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http://www.urmia.ac.ir/vrf/Shared%20Documents/pdf/vol-5%20no-1/13-19-0386.pdf

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