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Protection of pigs against post-weaning multisystemic wasting syndrome by a recombinant adenovirus expressing the capsid protein of porcine circovirus type 2.
Vet Microbiol. 2007 Apr 15; 121(3-4):215-24.VM

Abstract

Post-weaning multisystemic wating syndrome (PMWS) associated with PCV2 was one of the most costly diseases currently faced by the swine industry. In order to develop a vaccine to control this disease, we previously constructed a recombinant adenovirus expressing the capsid of PCV2. Here, we examined the protection of swine against PMWS by the recombinant adenovirus. Eighteen 32-day-old pigs were assigned to three groups each with six. Group 1 was vaccinated subcutaneously with rAd-Cap and boosted 2 weeks later. Thirty-seven days after first vaccination, Groups 1 and 2 were oronasally challenged with virulent PCV2 isolate, 4 and 7 days later, intramuscularly exposed to keyhole limpet hemocyanin (KLH). Group 3 remained unchallenged but with KLH. The results showed that high level of PCV2-specific ELISA antibody and neutralizing antibody could be induced at 37 days after first vaccination. After challenge, pigs in vaccinated group had no clearly clinical signs, although some of them had increased rectal temperatures (>/=40 degrees C) for short time. The pyrexic phase in vaccinated group was significantly lighter than that in challenge-control group (P<0.05). The relative daily weight gain in vaccinated-challenged group was similar to that in empty control group. But it was significantly high compared to the challenge-control group (P<0.05). Mean while the pathological lesions and virema presented in vaccinated group were milder than those in control group. It indicated that the recombinant adenovirus was able to confer significant protection against clinical disease and reduce pathogenic lesions induced by PCV2 challenge, even though it could not provide complete virological protection. The recombinant adenovirus might be an attractive candidate vaccine for preventing the disease associated with PCV2 infection.

Authors+Show Affiliations

Key Laboratory of Animal Diseases Diagnostic and Immunology, College of Veterinary Medicine, Nanjing Agricultural University, Ministry of Agriculture, Nanjing 210095, China.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17215092

Citation

Wang, Xianwei, et al. "Protection of Pigs Against Post-weaning Multisystemic Wasting Syndrome By a Recombinant Adenovirus Expressing the Capsid Protein of Porcine Circovirus Type 2." Veterinary Microbiology, vol. 121, no. 3-4, 2007, pp. 215-24.
Wang X, Jiang P, Li Y, et al. Protection of pigs against post-weaning multisystemic wasting syndrome by a recombinant adenovirus expressing the capsid protein of porcine circovirus type 2. Vet Microbiol. 2007;121(3-4):215-24.
Wang, X., Jiang, P., Li, Y., Jiang, W., & Dong, X. (2007). Protection of pigs against post-weaning multisystemic wasting syndrome by a recombinant adenovirus expressing the capsid protein of porcine circovirus type 2. Veterinary Microbiology, 121(3-4), 215-24.
Wang X, et al. Protection of Pigs Against Post-weaning Multisystemic Wasting Syndrome By a Recombinant Adenovirus Expressing the Capsid Protein of Porcine Circovirus Type 2. Vet Microbiol. 2007 Apr 15;121(3-4):215-24. PubMed PMID: 17215092.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Protection of pigs against post-weaning multisystemic wasting syndrome by a recombinant adenovirus expressing the capsid protein of porcine circovirus type 2. AU - Wang,Xianwei, AU - Jiang,Ping, AU - Li,Yufeng, AU - Jiang,Wenming, AU - Dong,Xingtian, Y1 - 2006/12/09/ PY - 2006/07/31/received PY - 2006/11/04/revised PY - 2006/11/28/accepted PY - 2007/1/12/pubmed PY - 2007/6/6/medline PY - 2007/1/12/entrez SP - 215 EP - 24 JF - Veterinary microbiology JO - Vet. Microbiol. VL - 121 IS - 3-4 N2 - Post-weaning multisystemic wating syndrome (PMWS) associated with PCV2 was one of the most costly diseases currently faced by the swine industry. In order to develop a vaccine to control this disease, we previously constructed a recombinant adenovirus expressing the capsid of PCV2. Here, we examined the protection of swine against PMWS by the recombinant adenovirus. Eighteen 32-day-old pigs were assigned to three groups each with six. Group 1 was vaccinated subcutaneously with rAd-Cap and boosted 2 weeks later. Thirty-seven days after first vaccination, Groups 1 and 2 were oronasally challenged with virulent PCV2 isolate, 4 and 7 days later, intramuscularly exposed to keyhole limpet hemocyanin (KLH). Group 3 remained unchallenged but with KLH. The results showed that high level of PCV2-specific ELISA antibody and neutralizing antibody could be induced at 37 days after first vaccination. After challenge, pigs in vaccinated group had no clearly clinical signs, although some of them had increased rectal temperatures (>/=40 degrees C) for short time. The pyrexic phase in vaccinated group was significantly lighter than that in challenge-control group (P<0.05). The relative daily weight gain in vaccinated-challenged group was similar to that in empty control group. But it was significantly high compared to the challenge-control group (P<0.05). Mean while the pathological lesions and virema presented in vaccinated group were milder than those in control group. It indicated that the recombinant adenovirus was able to confer significant protection against clinical disease and reduce pathogenic lesions induced by PCV2 challenge, even though it could not provide complete virological protection. The recombinant adenovirus might be an attractive candidate vaccine for preventing the disease associated with PCV2 infection. SN - 0378-1135 UR - https://www.unboundmedicine.com/medline/citation/17215092/Protection_of_pigs_against_post_weaning_multisystemic_wasting_syndrome_by_a_recombinant_adenovirus_expressing_the_capsid_protein_of_porcine_circovirus_type_2_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0378-1135(06)00480-9 DB - PRIME DP - Unbound Medicine ER -