Relationship between season, lactation number and incidence of clinical mastitis in different stages of lactation in a Holstein dairy farm
| Autor: | Maede Moosavi, Abdolah Mirzaei, Mohsen Ghavami, Amin Tamadoد |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
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 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 Veterinary medicine SF600-1100 |
| Zdroj: | Veterinary Research Forum, Vol 5, Iss 1, Pp 13-19 (2013) |
| Druh dokumentu: | article |
| ISSN: | 2008-8140 |
| Popis: | 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, occurrence of mastitis in winter and spring during early lactation and in summer during late lactation period were more prevalent especially in lower parities. |
| Databáze: | Directory of Open Access Journals |
| Externí odkaz: |
|