Prevention of PRRSV infection in large breeding herds using air filtration

Spronk, Gordon; Otake, Satoshi; Dee, S.

doi:10.1136/vr.b4848

Cited by 33 publications

(34 citation statements)

References 7 publications

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“…Based on historical selection criteria [16,17], each candidate herd was required to have a breeding herd inventory of 2,400 sows or more. In addition, candidate herds needed to be surrounded by four or more growing pig sites within a radius of 4.7 km and candidate herds could not supply pigs to any of these surrounding sites.…”

Section: Methodsmentioning

confidence: 99%

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Evaluation of the Long-Term Effect of Air Filtration on the Occurrence of New PRRSV Infections in Large Breeding Herds in Swine-Dense Regions

Dee

Cano

Spronk

et al. 2012

Viruses

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Airborne transmission of porcine reproductive and respiratory syndrome virus (PRRSV) is a risk factor for the infection of susceptible populations. Therefore, a long‑term sustainability study of air filtration as a means to reduce this risk was conducted. Participating herds (n = 38) were organized into 4 independent cohorts and the effect of air filtration on the occurrence of new PRRSV infections was analyzed at 3 different levels from September 2008 to January 2012 including the likelihood of infection in contemporary filtered and non-filtered herds, the likelihood of infection before and after implementation of filtration and the time to failure in filtered and non-filtered herds. Results indicated that new PRRSV infections in filtered breeding herds were significantly lower than in contemporary non-filtered control herds (P < 0.01), the odds for a new PRRSV infection in breeding herds before filtration was 7.97 times higher than the odds after filtration was initiated (P < 0.01) and the median time to new PRRSV infections in filtered breeding herds of 30 months was significantly longer than the 11 months observed in non-filtered herds (P < 0.01). In conclusion, across all 3 levels of analysis, the long-term effect of air filtration on reducing the occurrence of new PRRSV infections in the study population was demonstrated.

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Section: Methodsmentioning

confidence: 99%

“…As a result of these findings, air filtration has been rapidly applied to commercial swine production [16,17]. In order to measure its effect, pilot studies were conducted in large breeding herds in regions of southern Minnesota and northern Iowa, USA, with a high density of pigs.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Long-Term Effect of Air Filtration on the Occurrence of New PRRSV Infections in Large Breeding Herds in Swine-Dense Regions

Dee

Cano

Spronk

et al. 2012

Viruses

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“…Interests of related research focused on examining effectiveness in disease control (Alonso, Murtaugh, et al, 2013;S. A. Dee et al, 2006;Spronk et al, 2010), rather than evaluating the actual particle removal efficiency of the filtration system. This study provides information of in-situ PM reduction by low MERV filter coupled with electrostatic system at an animal house.…”

Section: Particulate Matter (Pm) Removal Efficiencymentioning

confidence: 99%

Field Evaluation of an Electrostatic Air Filtration System for Reducing Incoming Particulate Matter of a Hen House

Zhao¹,

Chai²,

Richardson³

et al. 2018

Transactions of the ASABE

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Abstract. As a result of the unprecedented highly pathogenic avian influenza (HPAI) outbreak in the U.S. in 2014-2015, some egg producers in the U.S. started using inlet air filtration to reduce the risk of disease transmission by air into hen houses. The removal efficiency of particulate matter (PM), the carrier of airborne pathogens, by such filtration systems has not been investigated. Therefore, this field study was conducted to evaluate the PM removal efficacy of an electrostatic air filtration system (consisting of a low-grade air filter and an electrostatic particle ionization, or EPI, system) installed at the inlet of a commercial high-rise hen house. The evaluation was performed in two test rounds over a one-year period. Results showed that average PM removal efficiencies in round 1 (spring to summer) and round 2 (late fall to spring) were respectively 66% and 29% for PM1, 66% and 30% for PM2.5, 66% and 31% for PM4, 68% and 36% for PM10, and 68% and 45% for total PM. Removal efficiency became unstable when the EPI system was inactive (i.e., when solely relying on the filter for PM removal). House static pressure and ventilation rate indicated considerable clogging of the filter media by dust accumulation and the need for replacement after ~16 weeks of use in the spring-to-summer sampling period (round 1); however, clogging was not an issue during the entire late fall-to-spring sampling period (24 weeks, round 2). The appearance of the filter changed gradually as dust accumulated with time, which can be captured by image analysis and used to judge filter dirtiness and lifespan. The findings of this field study provide insight into the efficacy of PM removal by such a low-cost air filtration system, which will help egg producers in their decision-making for disease prevention strategies. Keywords: Electrostatic particle ionization, Filtration, Hen house, Particulate matter, Reduction.

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“…Despite major efforts to upgrade biosecurity in boar studs, recurrent problems with PRRS virus have required intensive monitoring of boars in an effort to rapidly detect introductions and avoid infection of recipient sow farms (Reicks et al., 2006; Rovira et al., 2007). In Minnesota and other regions of concentrated swine production, filtration of incoming air has become a standard procedure in boar studs and, more recently, is being implemented on sow farms (Dee et al., 2010; Spronk et al., 2010; Desrosiers, 2011).…”

Section: Industrialization Of Swine Production and Swine Healthmentioning

confidence: 99%

One World, One Health: The Threat of Emerging Swine Diseases. A North American Perspective

Davies

2012

Transboundary and Emerging Diseases

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Summary The predicted expansion of global livestock populations to meet the food and fibre demands of the growing human population raises numerous concerns, including the implications for disease emergence. The evolution of animal production in developed countries has been marked by substantial reduction in farm numbers with correspondingly larger herd sizes, specialization of enterprises, concentration or ownership and vertical integration. Innovations in the structure and operations of swine production have been largely driven by efforts to improve swine health, and the impact of several important swine diseases has declined. Productivity in swine production and the safety of pork products have increased markedly. The most significant emerging infectious diseases of pigs over the last decades have been highly host‐specific viruses rather than multihost pathogens. While some bacterial pathogens of pigs have increased in importance in modern systems, improved management systems and biosecurity have enabled herd sizes to increase without negative impact on swine health. The most vulnerable scenario for disease emergence in swine, particularly for zoonotic agents, may be rapid expansion and intensification of swine industries in developing countries without incorporating the stringent biosecurity measures and veterinary oversight that have helped maintain the health and productivity of large herds in North America. Factors that may influence disease emergence in the long term include regulatory measures (particularly related to antimicrobial use), genetics and feeding practices.

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Prevention of PRRSV infection in large breeding herds using air filtration

Cited by 33 publications

References 7 publications

Evaluation of the Long-Term Effect of Air Filtration on the Occurrence of New PRRSV Infections in Large Breeding Herds in Swine-Dense Regions

Evaluation of the Long-Term Effect of Air Filtration on the Occurrence of New PRRSV Infections in Large Breeding Herds in Swine-Dense Regions

Field Evaluation of an Electrostatic Air Filtration System for Reducing Incoming Particulate Matter of a Hen House

One World, One Health: The Threat of Emerging Swine Diseases. A North American Perspective

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