PMID- 8546019
OWN - NLM
STAT- MEDLINE
DCOM- 19960212
LR  - 20190914
IS  - 0514-7166 (Print)
IS  - 0514-7166 (Linking)
VI  - 42
IP  - 4
DP  - 1995 Jun
TI  - Pattern of infection with the porcine reproductive and respiratory syndrome virus 
      on swine farms in Belgium.
PG  - 209-15
AB  - On four closed breeding-fattening farms, 17 sows and their litters were examined 
      for porcine reproductive and respiratory syndrome virus (PRRSV) antibodies in the 
      blocking enzyme-linked immunosorbent assay (ELISA). On each farm, the pigs were 
      born within the same week and remained together for 12 weeks. The pigs were 
      followed serologically to determine the antibody profile with the purpose of 
      establishing the infection pattern of PRRSV. A total of 13 sows had antibodies 
      and a positive correlation existed between their titre and the maternal antibody 
      titre of their litters at 2 weeks of age. The maternal antibodies were detectable 
      until 4-10 weeks of age. On two farms, no infection occurred during the time of 
      the experiment as no seroconversion was observed in the eight litters. On the two 
      other farms, infection was observed in eight of the nine litters between 4 and 12 
      weeks of age while one litter became infected during the fattening period. In 
      some litters, a few pigs seroconverted between 6 and 8 weeks, others between 8 
      and 10 weeks and still others between 10 and 12 weeks. This observation indicated 
      a rather slow spreading pattern of PRRSV. At the time of entry on four commercial 
      fattening farms, which is 10-11 weeks of age, 15%, 50%, 75% and 60%, 
      respectively, of the pigs had antibodies to PRRSV. Based on the rate of decline 
      of maternal antibodies as determined by the studies on the closed 
      breeding-fattening farms, it was indicated that these positive pigs had already 
      been infected on the farm of origin.(ABSTRACT TRUNCATED AT 250 WORDS)
FAU - Houben, S
AU  - Houben S
AD  - Laboratory of Virology, Faculty of Veterinary Medicine, University of Gent, 
      Belgium.
FAU - van Reeth, K
AU  - van Reeth K
FAU - Pensaert, M B
AU  - Pensaert MB
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - Germany
TA  - Zentralbl Veterinarmed B
JT  - Zentralblatt fur Veterinarmedizin. Reihe B. Journal of veterinary medicine. 
      Series B
JID - 0331325
RN  - 0 (Antibodies, Viral)
SB  - IM
MH  - Animals
MH  - Antibodies, Viral/*blood
MH  - Belgium/epidemiology
MH  - Female
MH  - Immunity, Maternally-Acquired
MH  - Infertility, Female/epidemiology/immunology/*veterinary/virology
MH  - Lung Diseases/epidemiology/immunology/*veterinary/virology
MH  - Swine
MH  - Swine Diseases/epidemiology/immunology/*virology
MH  - Syndrome
MH  - Time Factors
EDAT- 1995/06/01 00:00
MHDA- 1995/06/01 00:01
CRDT- 1995/06/01 00:00
PHST- 1995/06/01 00:00 [pubmed]
PHST- 1995/06/01 00:01 [medline]
PHST- 1995/06/01 00:00 [entrez]
AID - 10.1111/j.1439-0450.1995.tb00704.x [doi]
PST - ppublish
SO  - Zentralbl Veterinarmed B. 1995 Jun;42(4):209-15. doi: 
      10.1111/j.1439-0450.1995.tb00704.x.