Abstract
Porcine parvovirus (PPV) is one of the causative agents in reproductive disorders in swine that causes great economic losses. The objective of our research was to determine prevalence of this infection on farms with intensive breeding in 5 municipalities in Vojvodina. The research encompassed 19 herds with a total of 344 blood samples screened for the presence of antibodies against PPV (gilts, breeding sows and boars). Serological examination was carried out by haemagglutination inhibition test (HI test). After the analyses of the results, seropositive animals were detected on the farms and there were no PPV-free farms. The determined antibody titre against PPV ranged from 1:64 to 1:16384. Out of 344 examined animals, there were 305 (88.66%) with a high antibody titre (1:1024 to 1:16384). The highest level of antibodies (1:16384) was detected in 145 animals, what is 42.15% of total number. In 24 animals (6.97%) titre antibody was 1:512 and these animals were of low seropositivity. Simultaneously, a comparison of antibodies in blood sera was carried out on 20 gilts (Table 3, farm 2) originating from a farm where the animals were vaccinated against PPV and 20 unvaccinated gilts (Table 4, farm 1) originating from a farm without vaccination against PPV. In unvaccinated animals antibody titre was unequal and ranged from 1:256 to 1:16384, in unvaccinated animals the values were considerably higher and ranged from 1:4096 do 1:16384, and in 17 out of 20 vaccinated pigs (85%) the highest antibody titre was 1:16384.
Highlights
Porcine parvovirus (PPV) je jedan od najznaåajnijih uzroånika reproduktivnih poremeñaja u zapatima svinja u intenzivnom uzgoju koji izaziva ozbiljne ekonomske gubitke
U naãim krajevima oboljenje je prvi put zabeleæeno 70. godina proãlog veka i od tada je stalno prisutno, naroåito meœu kliniåki zdravim svinjama u intenzivnom uzgoju u vidu inaparentne infekcije perzistentnog karaktera
Kod nevakcinisanih æivotinja nivo antitela je neujednaåen i kreñe se u rasponu od 1:256 do 1:16384, dok su kod vakcinisanih ove vrednosti viãe i koncentrisane u intervalu od 1:4096 do 1:16384, a kod 17 od 20 vakcinisanih svinja utvrœeni nivo titra antitela iznosio je 1:16384
Summary
Parvovirus svinja (PPV) je jedan od znaåajnih uzroånika reproduktivnih poremeñaja svinja koji izaziva velike ekonomske gubitke. Analizom rezultata pregledanih uzoraka seruma, seropozitivne æivotinje utvrœene su na svim ispitanim farmama, a nijedna farma nije bila slobodna od infekcije. Utvrœene vrednosti titra specifiånih antitela protiv parvovirusa svinja kod svih jedinki bile su u rasponu od 1:64 do 1:16384. Kod 24 jedinke (6,97%) titar antitela bio je £1:512 i ove æivotinje su svrstane u nisko seropozitivne. Uporedno je izvrãeno i poreœenje nivoa antitela u krvnim serumima 20 nazimica sa farme koja sprovodi profilaktiåke mere vakcinacije protiv PPV (tabela 3, farma 2) i 20 nevakcinisanih nazimica (tabela 4, farma 1) sa farme gde se vakcinacija ne sprovodi, gde se jasno uoåava razlika u rasporedu titra antitela. Kod nevakcinisanih æivotinja utvrœene vrednosti titra antitela bile su neujednaåene i kretale su se u rasponu od 1:256 do 1:16384, dok su kod vakcinisanih ove vrednosti bile viãe i koncentrisane u intervalu od 1:4096 do 1:16384, a kod 17 od 20 vakcinisanih svinja (85%) utvrœen je najviãi nivo antitela od 1:16384
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