The Guilty Gilt Guide was written with a clear objective – to maximize the whole-herd performance of pig populations by helping gilts to reach their full reproductive potential and produce healthy pigs that reach their full genetic potential during grow-finish.
The open reading frames (ORF)5 represents approximately 4% of the porcine repro- ductive and respiratory syndrome virus (PRRSV)-2 genome (whole-PRRSV) and is often determined by the Sanger technique, which rarely detects >1 PRRSV strain if present in the sample.
Porcine reproductive and respiratory syndrome virus (PRRSV) is an important swine pathogen affecting the global swine industry.
Mycoplasma hyopneumoniae (M. hyopneumoniae) infections continue to result in significant respiratory challenges in the swine industry worldwide. Vaccination for M. hyopneumoniae is commonly utilized, as reduction in bacterial loads and clinical severity in vaccinated pigs have been shown. However, the effect of M. hyopneumoniae vaccination on transmission across different pig populations has been minimally investigated.
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The Porcine Reproductive and Respiratory Virus (PRRSV) genome is a single-strand positive sense RNA of 15 kb in length, containing several structural and non-structural proteins. Among those proteins, GP5 is a structural glycosylated protein and the most variable of PRRSV1. ORF5 sequences from PRRSV type 2 have been grouped per lineages and sublineages2 that can be used as a reference to determine diversity of PRRSV isolates by regions or countries. The objective of this study was to sequence and analyze the ORF5 segment in PRRSV isolates obtained in different regions of Mexico during 2015–2019, thus documenting the genetic variation in the circulating variants of PRRSV according to their different linages and assisting in the understanding of the patterns of geographical distribution of this virus in Mexico.
The use of INGELVAC PRRS vaccines can significantly reduce lung lesions following challenge with heterologous isolates (86- 94% ORF5 nucleotide similarity) in the three-week-old pig respiratory challenge model.1 INGELVAC PRRS MLV demonstrated heterologous protection against challenge with current PRRSV lineage-1 RFLP 1-7-4 and 1-3-4 isolates.2 The objective of this study was to evaluate the efficacy of two commercially available PRRSV vaccines in a three-week-old pig respiratory challenge model, using a heterologous PRRSV lineage-1 RFLP 1-7-4 field strain that was isolated in 2016.
In China, porcine reproductive and respiratory syndrome (PRRS) remains the major disease that endangers and restricts the reproductive performance of sows. PRRS 5 steps is a systemic strategy with multiply tools for PRRS control, which including gilts management and herd closure, vaccination, laboratory diagnostic, biosecurity, production management data analysis. The purpose of this study was to study the effects of different PRRS control measures on sow reproductive performance.
PRRSv remains a very costly desease in pig industry especially in grower finisher pigs1.Vaccination has been demonstrated the cost effective due to reduce of clinical sign and mortality of PRRS infection2. In spite of Type 1-PRRS MLV vaccination have been applied, there’s some introduction of new type 2-PRRSv field infection in grower-finisher farm. Consider of minimize production loss, Ingelvac PRRS MLV has demonstrated efficacy against heterologous PRRSv challenge when pigs already exposed by PRRSv type2 from the field3. The objective of this observation was to evaluate the effect of vaccination by Ingelvac PRRS MLV on the previous exposed in grower-finisher pigs.