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 detection capacity of Porcine Reproductive and Respiratory Syndrome virus (PRRSV) in tongues from dead animals in breeding herds (stillborns and piglets dying during the lactating period) and nursery farms (naturally dead animals) for PRRSV surveillance was evaluated. The samples were selected if pairs of serum and tongues were available from 2018 to 2020. Serum (pools of five) and exudate from tongues (one bag) were analyzed by PRRSV RT-PCR. The agreement between the serum sample procedure versus tongues exudate was assessed using a concordance test (Kappa statistic) at batch level. A total of 32 submissions, corresponding to 14 farms, had PRRSV diagnostic information for serum and tongues exudate. The overall agreement of batch classification as positive or negative, based on RT-PCR PRRSV results, between serum and tongue exudate of the 32 pairs was 76.9%. Cohen’s Kappa was 0.55. The main discrepancy came from the presence of positive samples in tongues exudate and not in serum, suggesting that tongue exudate to monitor PRRSV seems to be more sensitive than serum. These results suggest that this sample procedure could be also used for PRRSV surveillance and monitoring.
The main objective of this study was to evaluate the concordance of PRRSV detection in carcass fluids versus oral fluids and serum for active surveillance in swine farms.
A good concordance between detection of PRRSV in carcasses of any pig farm versus oral fluids and serum was observed.
Active surveillance of PRRSV from carcasses is a sensitive and cost-effective procedure.
The objective of this study was to quantify the effect of MLV vaccine on performance and measure wild-type virus shedding to sentinels and in aerosol.
The duration and frequency of PRRSV RNA detection in air was significantly higher in non-vaccinated controls than in the group vaccinated with Ingelvac PRRS MLV.
The observed performance benefits as well as shedding reduction in vaccinated pigs challenged with wild-type virus support the recommendation of MLV vaccination of growing pigs at risk of infection.
The purpose of this controlled-experimental study was to evaluate pigs vaccinated with 3FLEX® (a trivalent PCV2, M. hyopneumoniae and PRRS vaccine) compared to a non-vaccinated group following a severe PRDC challenge.
The challenge incorporated a well referenced virulent heterologous PRRSV isolate, and a contemporary virulent PCV2 field isolate given simultaneously with M. hyopneumoniae.