Risk factors for Aujeszky’s disease in pig herds and detection of field virus antibodies in fattening pigs in the state of Yucatan, Mexico

Rodríguez-Buenfil, Jorge C.; Álvarez-Fleites, M.; Alzina-López, Alejandro; Arjona-Torres, Madeleine G; Segura-Correa, JC; Villegas-Perez, Sandra Luz

doi:10.1016/s0167-5877(01)00267-7

Cited by 7 publications

(6 citation statements)

References 16 publications

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“…Reports concerning the influence of herd size on PRV seroprevalence are conflicting. Some researchers have reported no association between PRV status and herd size [ 11 ], which supports our findings in the current study. Others have suggested an increased risk of PRV infection with larger herd sizes [ 2 , 6 ].…”

supporting

confidence: 93%

Aujeszky’s disease and the effects of infection on Japanese swine herd productivity: a cross-sectional study

Yamane

Ishizeki²,

Yamazaki

2015

The Journal of Veterinary Medical Science

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Pseudorabies virus (PRV) is endemic in some regions of Japan. We investigated the effects of PRV infection status on herd productivity. Serum samples were obtained from 48 swine herds in Japan. Within each herd, three serum samples were obtained from growing pigs at four different ages, as well as from sows in low and high parity groups. Sera were tested for antibodies against wild-type PRV via competitive ELISA. Herds were classified into PRV positive and negative groups based on serological results. Herds infected with PRV exhibited postweaning mortalities (6.84%) that were significantly (P=0.0018) higher than those in unaffected herds (4.73%). Because of the reduced productivity in PRV positive herds, the current PRV eradication program must be strengthened.

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supporting

confidence: 93%

Aujeszky’s disease and the effects of infection on Japanese swine herd productivity: a cross-sectional study

Yamane

Ishizeki²,

Yamazaki

2015

The Journal of Veterinary Medical Science

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“…This study is one of the first epidemiological studies targeting on PRV sero-prevalence in intensive Published studies conducted in other countries also identified risk factors related to PRV seropositivity in pig farms such as introduction of gilts, pig density, herd size, pig farm location and low biosecurity practices (Siegel and Weigel, 1999;Rodriguez-Buenfil et al, 2002;Tamba et al, 2002).…”

Section: Discussionmentioning

confidence: 88%

“…As sows were randomly selected on the farms, it was likely that farms detected a sero-positive were indeed PRV infected in the past. Thirdly, gilts or young sows are more likely to be introduced in the farm in the last 12 month (Rodriguez-Buenfil et al, 2002;Rodríguez-Buenfil et al, 2002).…”

Section: Discussionmentioning

confidence: 99%

Epidemiology of pseudorabies in intensive pig farms in Shanghai, China: Herd-level prevalence and risk factors

Xia

QuanYun

Wang

et al. 2018

Preventive Veterinary Medicine

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Pseudorabies (PR), also known as Aujeszky's disease, is a highly contagious disease affecting pigs and a wide range of animals. Pseudorabies is enzootic in many countries. In China, it is a priority animal disease for control and eradication, however the data on disease frequency in intensive pig farms and the information on associated risk factors is inadequate. A cross-sectional study of intensive pig farms (≥350 sows) in Shanghai was conducted to determine herd-level prevalence of PRV and associated risk factors. Following a two-stage random sampling design, a total of 1,349 sow serum samples were tested by gpI-ELISA from a total of 91 intensive pig farms in Shanghai. A herd was classified as positive if at least one PRV test-positive sow was present. Information on putative risk/protective factors was collected using questionnaires to pig farm owners or veterinarians. A logistic regression model was built to identify risk/protective factors for herd positivity. The results indicated that the herd-level true prevalence was 67.6% (95% CI：57.0 -77.0). In the multivariable logistic regression model using backward stepwise procedure, two risk factors were found to be significantly associated with herd positivity: 'Breeding with introduced sows in the last 12 months' (OR=3.5, 95%CI:1.2, 10.3) and 'Presence of stray dogs or cats' (OR=4.0, 95%CI: 1.2, 12.6). The multivariable logistic model fitted the data well. Hosmer-Lemeshow goodness of fit test showed  2 = 10.86 (df = 8, p = 0.21 > 0.05) and the predictability (area under the ROC curve) was 0.86. This study suggested that PR was highly endemic in intensive pig farms in Shanghai. The risk and protective factors identified in this study could be useful to improve the prevention policy of PR in Shanghai and other areas of China.

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“…In our experiment, specific antibodies to ADV and gE antibodies were detected in all vaccinated pigs, which is a result of vaccination and infection. Rodriguez-Buenfil et al (2002) also analyzed serum samples for antibodies to ADV in sows and presented a cross-sectional study to determine the prevalence of antibodies in fattening pigs. Sera were analyzed by the screening-ELISA and gE-ELISA tests.…”

Section: Discussionmentioning

confidence: 99%

Effect of Baypamun Treatment on Aujeszky’s Disease Virus (ADV) Transmission in Pigs

Biuk-Rudan¹,

Šver²,

Valpotić³

et al. 2004

Acta Vet. Brno

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The effect of Baypamun treatment in Aujeszky's disease virus (ADV) transmission from pigs challenged with virulent ADV was evaluated. Twenty 6-week-old crossbred pigs were divided into four equal groups and subjected to either vaccination or Baypamun treatment or challenge infection with ADV. The pigs of group I were vaccinated with gEvaccine against Aujeszky's disease (Ayvac, Pliva, Zagreb, Croatia), the pigs of group II were treated by Baypamun as a non-specific immunostimulating agent, those of group III were inoculated with a virulent strain of Aujeszky's disease virus strain NIA-3, and group IV was used as control. After challenge infection of pigs of group III, all other groups were housed together. The amount of total antibodies and gE antibodies to Aujeszky's disease virus in sera of tested piglets was determined by immunoenzyme test. Isolation of PBL and lymphocyte stimulation test also was carried out. Our results indicate that pigs of groups I and II were better protected from, or less affected by, contact infection, respectively. Significantly higher mortality was detected in pigs of group III than in any other group. In this group, the most extensive pathomorphologic changes were also found. However, they were similar in group II and group IV. The former group of pigs had a lower incidence of diarrhoea (0/5 : 2/5) and increased reactivity of T and B cells compared to controls (group IV). Although Baypamun did not affect specific antibody production, the obtained results are encouraging, with regard to the non-specific immunostimulatory effect of BPM in pigs exposed to contact ADV infection.

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Risk factors for Aujeszky’s disease in pig herds and detection of field virus antibodies in fattening pigs in the state of Yucatan, Mexico

Cited by 7 publications

References 16 publications

Aujeszky’s disease and the effects of infection on Japanese swine herd productivity: a cross-sectional study

Aujeszky’s disease and the effects of infection on Japanese swine herd productivity: a cross-sectional study

Epidemiology of pseudorabies in intensive pig farms in Shanghai, China: Herd-level prevalence and risk factors

Effect of Baypamun Treatment on Aujeszky’s Disease Virus (ADV) Transmission in Pigs

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