Seroprevalence of Antibody to Procine Reproductive and Respiratory Syndrome Virus in Diagnostic Submissions

Kim, Su Mi; Han, Tae Uk; Kang, Shien-Young; Shin, Kihyun; Kim, Chul-Joong; Kim, Jong Taik; Kim, Hyun Soo

doi:10.4142/jvs.2002.3.3.159

Cited by 4 publications

(4 citation statements)

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“…The results of PRRS monitoring in Russia in 1997-2006 according to the laboratory test data of our Centre indicate that PRRSV is widespread on Russian pig farms including the examined regions (Table 1). Four regions (Vladimirskaya Oblast, Moscovskaya Oblast, Tverskaya Oblast, Belgorodskaya Oblast) are situated in the central part of the country, and (Kim et al 2002). In Denmark the herd PRRS status classification by the indirect ELISA was validated in 47 herds by the collection of blood samples from the herds and 29 herds (61.7%) were classified as PRRS seropositive (Mortensen et al 2001).…”

Section: Resultsmentioning

confidence: 99%

Investigation of wild boar (Sus scrofa) for porcine reproductive and respiratory syndrome in some territories of Russia

et al. 2007

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Samples of blood sera and internal organs were collected from 90 shot wild boars (Sus scrofa) in five regions of Russian Federation. Blood sera were tested for antibodies against porcine reproductive and respiratory syndrome virus (PRRSV) using enzyme-linked immunosorbent assay (ELISA). In addition, samples of internal organs (lungs, lymph nodes, spleen) were tested by polymerase chain reaction (nested PCR) for PRRSV antigen. The result of our investigation showed that all samples were negative. However, PRRSV is widespread in domestic swine throughout Russia including the examined regions. Since the results show the absence of PRRSV infection in wild boars in the five examined regions of Russia, wild boars seem not to play any role in the epidemiology of PRRSV in Russia.

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Section: Resultsmentioning

confidence: 99%

Investigation of wild boar (Sus scrofa) for porcine reproductive and respiratory syndrome in some territories of Russia

et al. 2007

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“…Based on a field survey in 2001, 230 of 256 pig farms in Korea tested positive (89.8%) for PRRSV antibodies [25], indicating that PRRSV has spread throughout the country. Thus, for preventive purposes, MLVs costing as much as 2.5 billion KRW per year are used in South Korea.…”

Section: Discussionmentioning

confidence: 99%

“…The total annual economic impact of PRRS on the US swine producers is estimated at $66.75 million in breeding herds and $493.57 million in growing pig populations [ 7 ]; the situation in South Korea is the same. Based on a field survey in 2001, 230 of 256 pig farms in Korea tested positive (89.8%) for PRRSV antibodies [ 25 ], indicating that PRRSV has spread throughout the country. Thus, for preventive purposes, MLVs costing as much as 2.5 billion KRW per year are used in South Korea.…”

Section: Discussionmentioning

confidence: 99%

The assessment of efficacy of porcine reproductive respiratory syndrome virus inactivated vaccine based on the viral quantity and inactivation methods

Kim

Jung³

et al. 2011

Virol J

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BackgroundThere have been many efforts to develop efficient vaccines for the control of porcine reproductive and respiratory syndrome virus (PRRSV). Although inactivated PRRSV vaccines are preferred for their safety, they are weak at inducing humoral immune responses and controlling field PRRSV infection, especially when heterologous viruses are involved.ResultsIn all groups, the sample to positive (S/P) ratio of IDEXX ELISA and the virus neutralization (VN) titer remained negative until challenge. While viremia did not reduce in the vaccinated groups, the IDEXX-ELISA-specific immunoglobulin G increased more rapidly and to significantly greater levels 7 days after the challenge in all the vaccinated groups compared to the non-vaccinated groups (p < 0.05). VN titer was significantly different in the 106 PFU/mL PRRSV vaccine-inoculated and binary ethylenimine (BEI)-inactivated groups 22 days after challenge (p < 0.05). Consequently, the inactivated vaccines tested in this study provided weak memory responses with sequential challenge without any obvious active immune responses in the vaccinated pigs.ConclusionsThe inactivated vaccine failed to show the humoral immunity, but it showed different immune response after the challenge compared to mock group. Although the 106 PFU/mL-vaccinated and BEI-inactivated groups showed significantly greater VN titers 22 days after challenge, all the groups were already negative for viremia.

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“…Reproductive failure is mainly characterized by increased premature farrowings (between 100 and 112 days) and late-term abortions (between 107 and 112 days of gestation), low farrowing rate, increased numbers of abnormal piglets born (mummified, stillborn, weak and splay-legged), and low numbers of live born and weaned piglets (Meredith, 1995;Chung et al, 1997). After an acute outbreak of PRRS, herds may undergo chronic loss of production in fatteners and sometimes recurrent reproduction problems in sows (Stevenson et al, 1993;Kim et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Long‐term administration of a commercial porcine reproductive and respiratory syndrome virus (PRRSV)‐inactivated vaccine in PRRSV‐endemically infected sows

Papatsiros¹,

Alexopoulos²,

Kritas

et al. 2006

Journal of Veterinary Medicine, Series B

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The purpose of this study was to investigate the safety and efficacy of a commercial European porcine reproductive and respiratory syndrome virus (PRRSV)-inactivated vaccine after 18-month use in gilts/sows at a farm with high seroprevalence. In a farrow-to-finish farm with 1100 sows, all sows and gilts were systematically vaccinated with the PRRS-inactivated PROGRESSIS vaccine for a period of 18 months. Farm's reproductive and litter characteristics were longitudinally recorded for this period and historically compared with those of the year prior to vaccination. Serology, employing immunoperoxidase monolayer assay, had confirmed a high prevalence of PRRS-specific antibodies in most age groups within the farm prior to vaccination. Seroprevalence during the experiment ranged between 0% and 100% in weaners and growers, but remained at stable high levels (> 93%) in finishing pigs and gilts throughout all 2-year period of serology measurements. No local or systemic vaccine side effects were noted throughout the trial period. Vaccinations had resulted over time in a significant improvement of sow reproductive performance (e.g. reduction of premature farrowings, abortions and increase of farrowing rate) and litter characteristics (e.g. increase of the number of live born and weaned pigs and decrease of stillborn, mummified, weak and splay-legged piglets). It has also been observed that the higher the degree of immunization of a sow, the better the improvement of her reproductive parameters. Sows after vaccination have shown improved characteristics compared to homoparous sows prior to the application of vaccinations in the farm.

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Seroprevalence of Antibody to Procine Reproductive and Respiratory Syndrome Virus in Diagnostic Submissions

Cited by 4 publications

References 0 publications

Investigation of wild boar (Sus scrofa) for porcine reproductive and respiratory syndrome in some territories of Russia

Investigation of wild boar (Sus scrofa) for porcine reproductive and respiratory syndrome in some territories of Russia

The assessment of efficacy of porcine reproductive respiratory syndrome virus inactivated vaccine based on the viral quantity and inactivation methods

Long‐term administration of a commercial porcine reproductive and respiratory syndrome virus (PRRSV)‐inactivated vaccine in PRRSV‐endemically infected sows

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