PMID- 28716191
OWN - NLM
STAT- MEDLINE
DCOM- 20180517
LR  - 20220408
IS  - 1873-1716 (Electronic)
IS  - 0167-5877 (Linking)
VI  - 144
DP  - 2017 Sep 1
TI  - Effect of immunologic solutions on sows and gilts on time to stability, and 
      production losses in breeding herds infected with 1-7-4 PRRSv.
PG  - 112-116
LID - S0167-5877(17)30103-4 [pii]
LID - 10.1016/j.prevetmed.2017.05.024 [doi]
AB  - Porcine reproductive and respiratory syndrome virus (PRRSv) is an economically 
      significant swine pathogen causing production losses in the global swine 
      industry. Clinical impact depends on many factors including the virus itself. One 
      method to sub-type PRRSv is using restriction fragment length polymorphism 
      (RFLP). The RFLP pattern 1-7-4 emerged within the United States swine industry in 
      2014 and has become prevalent since then. This was a field study that 
      prospectively followed 1-7-4-infected breeding herds (n=107) and compared time to 
      stability (TTS), time to baseline production (TTBP) and total loss per 1000 sows 
      between herds using modified-live virus vaccine (MLV) on sows and gilts 
      (MLV-MLV), MLV on sows and MLV in addition to field virus exposure on gilts 
      (MLV-MLV/FVE) or not deliberately exposing sows or gilts to PRRSv 
      (Natural-Natural). Analyses were done in SAS 9.4 and results were adjusted by 
      selected co-variates (duration of herd closure, number of previous PRRSv 
      outbreaks of last 3 years, weaning frequency/week, gilt development unit 
      location, herd size and production system). Survival analysis was conducted on 
      TTS and TTBP and regression analysis on total loss. Herds in the Natural-Natural 
      group achieved TTS and TTBP before other herds. Herds in the MLV-MLV/FVE had the 
      longest TTS and TTBP. The total loss was numerically least in MLV-MLV herds (1194 
      pigs/1000 sows) compared to MLV/MLV-FVE (1810/1000 sows) and Natural-Natural 
      (2671/1000 sows). This study provided additional information to assist 
      veterinarians deciding between methods of exposure to manage PRRSv infection from 
      breeding herds.
CI  - Copyright (c) 2017 Elsevier B.V. All rights reserved.
FAU - Linhares, D C L
AU  - Linhares DCL
AD  - Iowa State University College of Veterinary Medicine, 2221 Lloyd Veterinary 
      Medicine Center, 1600 16S Street, Ames, IA, 50010, USA. Electronic address: 
      dcl.linhares@gmail.com.
FAU - Betlach, C
AU  - Betlach C
AD  - University of Minnesota College of Veterinary Medicine, 385B Animal Science 
      Veterinary Medicine Building, 1988 Fitch Avenue, St. Paul, MN, 55108, USA.
FAU - Morrison, R B
AU  - Morrison RB
AD  - University of Minnesota College of Veterinary Medicine, 385B Animal Science 
      Veterinary Medicine Building, 1988 Fitch Avenue, St. Paul, MN, 55108, USA.
LA  - eng
PT  - Journal Article
DEP - 20170606
PL  - Netherlands
TA  - Prev Vet Med
JT  - Preventive veterinary medicine
JID - 8217463
RN  - 0 (Vaccines, Attenuated)
RN  - 0 (Viral Vaccines)
SB  - IM
MH  - Animals
MH  - *Breeding
MH  - Female
MH  - Porcine Reproductive and Respiratory Syndrome/*prevention & control/virology
MH  - Porcine respiratory and reproductive syndrome virus/*immunology
MH  - Swine
MH  - Vaccines, Attenuated
MH  - *Viral Vaccines
MH  - Weaning
OTO - NOTNLM
OT  - Control
OT  - EWMA
OT  - Elimination
OT  - Live virus exposure
OT  - Modified-live virus vaccine
OT  - PRRSv
OT  - Pigs
OT  - Statistical process control
OT  - Whole herd exposure
EDAT- 2017/07/19 06:00
MHDA- 2018/05/18 06:00
CRDT- 2017/07/19 06:00
PHST- 2017/02/01 00:00 [received]
PHST- 2017/05/01 00:00 [revised]
PHST- 2017/05/30 00:00 [accepted]
PHST- 2017/07/19 06:00 [entrez]
PHST- 2017/07/19 06:00 [pubmed]
PHST- 2018/05/18 06:00 [medline]
AID - S0167-5877(17)30103-4 [pii]
AID - 10.1016/j.prevetmed.2017.05.024 [doi]
PST - ppublish
SO  - Prev Vet Med. 2017 Sep 1;144:112-116. doi: 10.1016/j.prevetmed.2017.05.024. Epub 
      2017 Jun 6.