PMID- 18554826
OWN - NLM
STAT- MEDLINE
DCOM- 20090622
LR  - 20090408
IS  - 1873-2232 (Electronic)
IS  - 0378-4320 (Linking)
VI  - 112
IP  - 3-4
DP  - 2009 Jun
TI  - Effect of clinical mastitis and other diseases on reproductive performance of 
      Holstein cows.
PG  - 273-82
LID - 10.1016/j.anireprosci.2008.04.024 [doi]
AB  - The objective of this study was to evaluate the effect of clinical mastitis and 
      (or) other diseases on reproductive performance in lactating Holstein cows. Cows 
      (n=967) from a commercial dairy farm were divided into four groups 
      retrospectively: cows with clinical mastitis and other diseases (MD, n=54), 
      clinical mastitis only (M, n=154), other diseases only (D, n=187), and cows with 
      no record of clinical mastitis or other diseases (H, n=572). Days in milk at 
      first service (DIMFS), services per conception (S/C), days not pregnant (DNP), 
      the rate at which animals became pregnant over time and the proportion of cows 
      that remained non-pregnant during 224 days of lactation were evaluated. Groups MD 
      and M had greater (P<0.05) DNP compared with H (155+/-15 and 140+/-5 vs. 88+/-2, 
      respectively). Moreover, MD and M had greater (P<0.05) S/C compared with H 
      (3.0+/-0.4 and 2.1+/-0.1 vs. 1.6+/-0.1, respectively). The rate at which animals 
      became pregnant over time was less (P<0.05) for MD and M and tended (P=0.1) to be 
      less for D when compared with H. In addition, proportion of cows that remained 
      non-pregnant by 224 days of lactation was greater (P<0.05) in MD, M, and D 
      compared with H. Cows with mastitis were also divided into three groups according 
      to the day of occurrence of the first case of clinical mastitis: (1) clinical 
      mastitis occurred before 56 days postpartum (MP1); (2) clinical mastitis occurred 
      between 56 and 105 days after parturition (MP2); and (3) clinical mastitis 
      occurred after 105 days postpartum (MP3) Regardless of the time of occurrence, 
      DNP was greater (P<0.05) for cows with mastitis compared with H. Time of mastitis 
      occurrence affected S/C in that cows in MP2 and MP3 had a greater S/C compared 
      with H cows (P<0.05). Reproductive efficiency was decreased by the presence of 
      clinical mastitis alone because a greater proportion of cows with mastitis 
      remained non-pregnant over time. Moreover, a greater proportion of cows with 
      mastitis or diseases remained non-pregnant by 224 postpartum. Furthermore, the 
      negative effects on reproduction were exacerbated when cows experienced both 
      clinical mastitis and other diseases.
FAU - Ahmadzadeh, A
AU  - Ahmadzadeh A
AD  - Animal and Veterinary Science Department, University of Idaho, P.O. Box 442330, 
      Moscow, ID 83844, USA. amin@uidaho.edu
FAU - Frago, F
AU  - Frago F
FAU - Shafii, B
AU  - Shafii B
FAU - Dalton, J C
AU  - Dalton JC
FAU - Price, W J
AU  - Price WJ
FAU - McGuire, M A
AU  - McGuire MA
LA  - eng
GR  - P20 RR15587/RR/NCRR NIH HHS/United States
PT  - Journal Article
PT  - Research Support, N.I.H., Extramural
PT  - Research Support, Non-U.S. Gov't
DEP - 20080503
PL  - Netherlands
TA  - Anim Reprod Sci
JT  - Animal reproduction science
JID - 7807205
SB  - IM
MH  - Animals
MH  - Cattle/*physiology
MH  - Cattle Diseases/epidemiology/*physiopathology
MH  - Dairying
MH  - Efficiency
MH  - Female
MH  - Incidence
MH  - Lactation/physiology
MH  - Mastitis, Bovine/complications/epidemiology/*physiopathology
MH  - Pregnancy
MH  - Pregnancy Rate
MH  - Reproduction/*physiology
MH  - Retrospective Studies
MH  - Time Factors
EDAT- 2008/06/17 09:00
MHDA- 2009/06/23 09:00
CRDT- 2008/06/17 09:00
PHST- 2007/12/20 00:00 [received]
PHST- 2008/03/24 00:00 [revised]
PHST- 2008/04/25 00:00 [accepted]
PHST- 2008/06/17 09:00 [pubmed]
PHST- 2009/06/23 09:00 [medline]
PHST- 2008/06/17 09:00 [entrez]
AID - S0378-4320(08)00154-1 [pii]
AID - 10.1016/j.anireprosci.2008.04.024 [doi]
PST - ppublish
SO  - Anim Reprod Sci. 2009 Jun;112(3-4):273-82. doi: 
      10.1016/j.anireprosci.2008.04.024. Epub 2008 May 3.