Studies on Heterologous Protection Between Japanese Type 1 and Type 2 Porcine Reproductive and Respiratory Syndrome Virus Isolates

This is our Friday rubric: every week a new Science Page from the Bob Morrison’s Swine Health Monitoring Project. The previous editions of the science page are available on our website.

Dr. Iseki and colleagues from the National Institute of Animal Health (NIAH, Japan) present studies on heterologous protection between Japanese type 1 and type 2 porcine reproductive and respiratory syndrome virus (PRRSV) isolates. The level of cross-protection that a type 2-based PRRSV vaccine can confer against various type 1 PRRSV field strains is important because no type 1 PRRSV-based vaccine is commercially available in Japan. Find this work here as an advanced publication of the Journal of Veterinary Medical Science.

Key Points:

  • This study evaluated the cross-protective immunity between type 1 and type 2 PRRSV isolates in growing pigs.
  • Immunity induced by the type 1 infection may play a role in reducing viremia caused by the type 2 PRRSV.
  • The immunity induced by the type 2 may not contribute to cross-protection against the type 1.
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Molecular detection of Porcine Reproductive and Respiratory Syndrome virus, Porcine Circovirus 2 and Hepatitis E virus in oral fluid compared to their detection in feces and serum

This is our Friday rubric: every week a new Science Page from the Bob Morrison’s Swine Health Monitoring Project. The previous editions of the science page are available on our website.

Doctors Plut, Kamnikar-Ciglenecki and Stukeli from the University of Ljubljana (Slovenia) highlight the usefulness of pig oral fluid (OF) to detect Porcine Reproductive and Respiratory Syndrome Virus (PRRSV), Porcine Circovirus Type 2 (PCV2) and Hepatitis E virus (HEV) in different pig age categories. Read here the full article published in BMC Veterinary Research.

Key Points

  • OF, feces and serum were evaluated for the detection of PRRSV, PCV2 and HEV in six farms.
  • OF samples had good agreement with serum sample PCR results for the detection of all three viruses.
  • The study highlights that pooled samples can potentially be used to investigate viral presence on farms.
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Introducing Dr. Catalina Picasso to the MSHMP Group

This is our Friday rubric: every week a new Science Page from the Bob Morrison’s Swine Health Monitoring Project. The previous editions of the science page are available on our website.

Today, we are excited to introduce our participants and recipients to Dr. Catalina (Cata) Picasso who will be working with the Morrison Swine Health Monitoring Project for the near future.

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Senecavirus A in processing fluids during an outbreak of SVA – a call for study participation!

This is our Friday rubric: every week a new Science Page from the Bob Morrison’s Swine Health Monitoring Project. The previous editions of the science page are available on our website.

Doctors Guilherme Preis and Cesar Corzo from the University of Minnesota share with us preliminary data from a Senecavirus A (SVA) outbreak investigation in a sow herd. This research emphasizes the importance of understanding the within-herd epidemiology of this virus.

Highlights

  • SVA is still present in the U.S. swine herds at lower levels.
  • SVA RNA has been consistently detected in processing fluids in the event of a disease outbreak in a sow herd.
  • Viral dynamics and shedding cessation in the breeding herds need to be better characterized.
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Impact of increasing age on pig performance and belly nosing prevalence in a commercial multisite production system

Today, we share last week Science Page from the Bob Morrison’s Swine Health Monitoring Project. The previous editions of the science page are available on our website.

Dr. Jamil E. G. Facci –Universidade Federal do Rio Grande do Sul (Brazil)- and colleagues evaluate the relationship between current commercial weaning ages and post-weaning resilience to stress. In relation to this topic and for further details, visit the full work published in the Journal of Animal Science.

Key Points

  • Increasing weaning age has an impact on pig production metrics and behavioral indicators.
  • Examining decisions about weaning age is important in today’s global scenario of antibiotic reduction and increased welfare concerns.
  • The reduction of removal and mortality during the nursery phase is an important impact of increased weaning age.
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