Charts

PRRS cumulative incidence (last updated April 2023)

This chart shows the incidence by month since 2009. Each season (July 1st to June 30th) is represented by a different color. The latest season’s incidence is shown in red.

Interpreting MSHMP’s Chart 1 for PRRS and PEDv

PRRS aggregate prevalence of sow herd status (last updated April 2023)

This chart shows the prevalence of farms in a given PRRS classification status since July 2009.

Review of MSHMP PRRS Chart 2 ‐ Prevalence

PRRS incidence by classification status (last updated April 2023)

This chart shows the PRRS incidence by classification status (number of new infections in a given classification status/number of farms initially in that PRRS classification status) in the current season.

Chart 3 description: PRRS incidence rate by status at break

PRRS EWMA (last updated April 2023)

This chart shows PRRS incidence weighted by the incidence in the previous week. Also, it shows the epidemic threshold for the current season and the number of new PRRS infections reported each week.

Chart 4 PRRS EWMA Review

 PED cumulative incidence (last updated April 2023)

This chart shows the incidence by month since 2013. Each season (July 1st to June 30th) is represented with a different color. The latest season’s incidence is shown in red.

Interpreting MSHMP’s Chart 1 for PRRS and PEDv

PED aggregate prevalence of sow herd status (last updated April 2023)

This chart shows the prevalence of farms in a given PED classification status since July 2009.

Review of MSHMP PRRS Chart 2 ‐ Prevalence

Outbreak history of farms that broke with PED (last updated April 2023)

This chart shows the number of farms that have experienced a PED break in the current season and the previous PED history (whether they have 0, 1, 2 breaks or no data available) for those same farms.

A Review of MSHMP’s Report PED Chart 3: PED Outbreak History

PED EWMA (last updated April 2023)

This chart shows PED incidence weighted by the incidence in the previous week. Also, it shows the epidemic threshold for PED and the number of new PED infections reported each week. 

Chart 4 PRRS EWMA Review

2023

January

• The changing disguises PRRSV might use to hide from a pig’s immunity
• Morrison Swine Health Monitoring Project (MSHMP) 2022 Summary
• Summary: Improving sow welfare and outcomes in the farrowing house by identifying early indicators from pre-farrowing assessment
• Evaluating a dry vs. wet disinfection in boot baths on detection of porcine epidemic diarrhea virus and porcine reproductive and respiratory virus RNA

February

• Time to a new PRRS outbreak in naïve breeding herds
• Seasonality of PEDV incidence in breeding herds during endemic transmission in the U.S.

March

• Summary: The effect of piglet vitality, birth order, and blood lactate on the piglet growth performances and preweaning survival
• Chart 3 description: PRRS incidence rate by status at break
• Wait and see? Biosecurity decision‐making under disease risk – Part 1

April

• Wait and see? Biosecurity decision‐making under disease risk – Part 2
• Summary: The evaluation of an artificial intelligence system for estrus detection in sows

May

• Can you estimate PRRSV piglet prevalence using family oral fluids? Yes, you can.
• Time for One Health: Do hog farms cause disease in North Carolina neighborhoods?

June

• Should we be concerned about the effect of sample handling on PRRSV detection by RT‐qPCR?
• Inter-Regional Spreading Patterns of Contemporary PRRSV-2 in the U.S.: A Molecular Epidemiological Perspective

2022

January

• Updated epidemiological curve of cases associated with the new Lineage 1C RFLP1-4-4 variant
• Porcine Reproductive and Respiratory Syndrome Surveillance in Breeding Herds and Nurseries Using Tongue Tips from Dead Animals
• Morrison Swine Health Monitoring Project (MSHMP) 2021 Summary
• Porcine reproductive and respiratory syndrome virus 2 (PRRSV-2) genetic diversity and occurrence of wild type and vaccine-like strains in the United States swine industry

 February

• Environmental contamination assessment in farms undergoing an outbreak with PRRS 1-4-4 Lineage 1C
• Summary: A putative PCV3-associated disease in piglets from Southern Brazil
• Experimental pig study confirms the high virulence of the recently emerged PRRSV 1-4-4 L1C variant strain

March

• PRRS RFLP, what is it and how we use them?
• What are PRRS lineages?
• PRRS 2021-2022 Exponentially Weighted Moving Average (EWMA) by State
• A survey to investigate the implementation methods of rotavirus ice cubes on swine farms

April

• Tracing the evolutionary history of the novel PRRSV-2 L1C-1-4-4 variant
• Summary: Superficial Inguinal Lymph Nodes for Screening Dead Pigs for African Swine Fever
• Prevalence comparison among different MSHMP cohorts

May

• Efficacy of “Tooth Extraction” for ASFV elimination and relevance of point of care testing  for ASFV to the field
• Modeling between-farm transmission dynamics of porcine epidemic diarrhea virus: characterizing the dominant transmission routes

June

• Evidence of influenza A infection and risk of transmission between pigs and farmworkers
• Virulence associated factors, antimicrobial resistance, and in silico serotyping of Streptococcus suis
• A Review of MSHMP’s Report PED Chart 3: PED Outbreak History

July 

• Summary: Experimental Infection of Domestic Pigs with an African Swine Fever Virus Field Strain Isolated in 2021 from the Dominican Republic
• Effect of Killed PRRSV Vaccine on Gut Microbiota Diversity in Pigs
• Comparative survival of different strains of porcine reproductive and respiratory syndrome virus
• Morrison Swine Health Monitoring Project Incidence Year 2021 / 2022 Annual Summary
• Outbreak investigations of Actinobacillus pleuropneumoniae serotype 15 in central Iowa in the winter of 2021-22

August 

• Measures of disease occurrence review
• Is the PRRSV isolate obtained in cell culture the same as the virus present in the original clinical sample?
• Description of a new clade within subtype 1 of Betaarterivirus suid 1 (PRRSV1) causing severe outbreaks in Spain

 September

• Evaluating the Efficacy of Boot Baths with Wet and Dry Disinfectants for Porcine Epidemic Diarrhea Virus and Porcine Reproductive and Respiratory Syndrome Virus 
• Tongue tip fluid (TTF): A welfare friendly directed population-based monitoring technique 
• Summary: Implementation of piglet castration under inhalation anaesthesia on farrowing farms 
• Welcoming Dr. Xiaomei Yue to the MSHMP Group 

October 

• Summary of: Antimicrobial use in lactating sows, piglets, nursery, and grower‐finisher pigs on swine farms in Ontario, Canada during 2017‐2018
• Summary: Evaluation of the Impact of Antimicrobial Use Protocols in Porcine Reproductive and Respiratory Syndrome Virus􀍲Infected Swine on Phenotypic Antimicrobial Resistance Patterns
• The role of feed in sustainable pork production: How feeding programs affect environmental impacts of pork production ‐ Part 1

November 

• The role of feed in sustainable pork production: How feeding programs affect environmental impacts of pork production - Part 2
• Leman Conference in Spanish Invitation
• Summary: The impacts of viral infection and subsequent antimicrobials on the microbiome resistome of growing pigs
• Porcine reproductive and respiratory syndrome prevalence and processing fluids use for diagnosis in United States breeding herds

December 

• When the farm is exposed to a critical level of PRRSv in air, the probability of having an outbreak is four times higher for non‐filtered farms: A retrospective analysis using wind data
• Comparative adsorption of Porcine Reproductive and Respiratory Syndrome Virus strains to Minnesota soils
• Merry Christmas and Happy Holidays From the MSHMP Team!

2021

January

• Assessment of the Impact of the Recombinant Porcine Reproductive and Respiratory Syndrome Virus Horsens Strain on the Reproductive Performance in Pregnant Sows
• Morrison Swine Health Monitoring Project (MSHMP) 2020 Summary
• Understanding Sow Mortality: Part 1
• Understanding Sow Mortality: Part 2

February

• Summary of: Susceptibility of domestic swine to experimental infection with severe acute respiratory syndrome coronavirus 2
• Can pigs get COVID-19 and transmit the virus to humans?
• Newly emerging PRRSV Lineage 1C variant nomenclature

March

• Stability of African Swine Fever Virus in soil and options to mitigate the potential transmission risk
• Porcine reproductive and respiratory syndrome virus dissemination across pig production systems in the United States
• Antimicrobial use in wean to market pigs in the United States assessed via voluntary sharing of proprietary data
• Turnover events of animal caretakers and productivity in Ohio swine farms

April

• Is the 2020Ͳ21 PRRS a different one?
• Review of MSHMP PRRS Chart 2: Prevalence

May

• Modelling the transmission and vaccination strategy for porcine reproductive and respiratory syndrome virus
• Preliminary analysis of whether mosquitoes can carry and transmit African swine fever

June

• Assessing Senecavirus A shedding and transmission in growing pig populations
• PRRS incidence in status 4 sow farms
• Breeding herd Senecavirus A infection: understanding its persistence
• Ability of different matrices to transmit African swine fever virus - Part 1

July

• Ability of different matrices to transmit African swine fever virus - Part 2
• Updated epidemiological curve of cases associated with the new Lineage 1C RFLP1-4-4
• Morrison Swine Health Monitoring Project Incidence Year 2020 / 2021 Annual Summary
• Evaluation of oral fluid as an aggregate sample for early detection of African swine fever virus using four independent pen-based experimental studies

August

• African Swine Fever Detected in the Dominican Republic for the first time in ~40 years!
• MSHMP data collection update 2020-2021
• Phylogenetic Structure and Sequential Dominance of Sub-Lineages of PRRSV Type-2 Lineage 1 in the United States
• Average time sites stay in a naïve PRRSV status: Preliminary Results

September

• An Analysis of Select Swine Feed Ingredients and Pork Products Imported into the US from African Swine Fever Virus (ASFV) Affected Countries
• Enhanced Passive Surveillance for African swine fever and Classical swine fever
• Assessing Senecavirus A shedding and transmission in growing pig populations

October

• Case Report: Report on the First African Swine Fever Case in Greece
• PRRSV 144 L1C: A Rapid Response to a National Crisis
• Post-epidemic dynamics of PEDV in the United States: Current trends and patterns
• Updated epidemiological curve of cases associated with the new Lineage 1C RFLP 1-4-4 variant

November

• Investigation of ultraviolet C (UVC) doses in homemade UVC chambers with items commonly used on swine farms
• Modelling PRRSV dissemination dynamics to quantify the contribution of multiple modes of transmission

December

• Evaluating the use of geofencing under field conditions
• Overview of Porcine Deltacoronavirus Occurrence in the United States Breeding Herds
• How many PRRSV variants can we find in a swine farm in a sampling event?
• Rethinking the uncertainty of African swine fever virus contamination in feed ingredients and risk of introduction into the United States
• Mitigating the risk of African Swine Fever virus entry into boar studs in the USA
• Chart 3 description: PRRS incidence rate by status at break

2020

January

• MSHMP 2019 summary
• Forecasting PEDv in the US through the use of machine learning
• Development of an automated model to capture and analyze whole-herd parameters associated with wean-to-finish mortality
• Addition of antioxidants controls and delays lipid oxidation, but does not affect growth performance
• Understanding whether PRRS viruses in a neighborhood are closely related

February

• Implication of early-life indicators for survival rate, subsequent growth performances and carcass caracteristics of commercial pigs
• Senecavirus A continues to be present in the US swine herds
• Energy, amino acid, and phosphorus digestibility and energy prediction of thermally processed food waste sources for swine

March

• Review of Chart 3: PRRS incidence rate by status at break
• A questionnaire survey of the illegal importation of pork products by air travelers into Japan from China and exploration of causal factors

April

• MSHMP during COVID-19
• Use of sequence technologies to improve swine infectious disease management
• A spatial and temporal analysis of sow cull management
• SARS-associated Coronavirus transmitted from human to pig
• Summary of: African swine fever virus survival in buried wild boar carcasses

May

• PEDV Detection in Manure Pits Confirmed 841 days to 1,949 Days after Disease Outbreaks
• How much is the spread of 1-7-4-related PRRS viruses due to animal movement?
• Porcine Deltacoronavirus in MSHMP sow herds
• Summary of: Impact of increasing age on pig performance and belly nosing prevalence in a commercial multisite production system
• Senecavirus A in processing fluids during an outbreak of SVA – a call for study participation!

June

• Introducing Dr. Catalina Picasso to the MSHMP Group
• Summary of: 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
• Summary of: Studies on Heterologous Protection Between Japanese Type 1 and Type 2 Porcine Reproductive and Respiratory Syndrome Virus Isolates

July

• Morrison Swine Health Monitoring Project Incidence Year 2019 / 2020 Annual Summary
• Use of test and removal strategy to contain an ASFV outbreak in a farm
• Review of: Incidence Risk and Incidence Rate

August

• Chart 4 PRRS EWMA Review
• Effect of Influenza A virus sow vaccination on infection in pigs at weaning: A prospective   longitudinal study
• Describing vehicle movement patterns within a production system in the Midwest

September

• Part 2: Describing vehicle movement patterns within a production system in the Midwest
• Susceptibility of swine cells and domestic pigs to SARS-CoV-2
• Summary of: Evaluation of viral RNA extraction methods to detect PRRS and influenza A viruses from used commercial HVAC air filters from swine farms
• Risk-based management of PRRS and PED

October

• Bench system biosecurity compliance assessment: A pilot project
• Understanding PRRSv diversity at the pig and litter level using whole genome sequencing
• Investigating PEDv Infections and Lessons to Improve Biosecurity in Finishing Pigs

November

• Summary of: Production losses five months after outbreak with a recombinant of two PRRSV vaccine strains in 13 Danish sow herds
• Farm data analysis for lifetime performance components of sows and their predictors in breeding herds
• Survival of swine pathogens in compost formed from preprocessed carcasses – Summary
• Comparative study to detect influenza A virus by RT-PCR using 5 different types of udder skin wipes and piglet nasal wipes

December

• Contemporary North American Mycoplasma hyopneumoniae MICs
• Phase-Feeding: Do Fewer Phases Compromise Growth Performance in Grow-Finish?
• Happy Holidays!

2019

2018

January

• EWMA by State
• 2017 summary
• Foreign Animal Disease and Secure Pork Supply: the Importance of Premises Identification Number

February

• Investigating the role of the environment and the lactating sow in PRRSV infections during an outbreak (Part 1)
• Investigating the role of the environment and the lactating sow in PRRSV infections during an outbreak (Part 2)
• Prevalence comparison among different MSHMP cohorts
• Influenza herd-level prevalence and seasonality in Midwestern sow farms

March

• Swine Global Surveillance Project: update and future steps
• Geographic distribution and genetic diversity of porcine circovirus type 3 from clinical samples in US swine farms
• PRRS EWMA analysis for years 2009-2018
• Stability of Porcine Epidemic Diarrhea Virus on Fomite Materials at Different Temperatures
• Assessment of area spread for sow herd outbreaks in US swine dense regions

April

• Sow Farm PRRS status classification survey
• Sow herd filter study
• Comparison of individual oral fluids, pooled oral fluids and Swiffer™ environmental samples of drinkers for the detection of influenza A virus and PRRS virus by PCR
• PRRS incidence in status 4 sow farms 

May

• Effective disease surveillance and response strategies depend on detailed swine shipment data
• Sow farm classification according to Mycoplasma hyopneumoniae status 
• Docking the tail or not: Effect on tail damage, skin lesions and growth performance
• Update on EWMA all versus EWMA original 13

June

• Vaccination against Lawsonia intracellularis decreases shedding of Salmonella enterica serovar Typhimurium in co-infected pigs changes the host gut microbiome
• Porcine Deltacoronavirus positive cases in the US: Where are we today?
• Herd-level prevalence and incidence of porcine epidemic diarrhea virus (PEDV) and porcine deltacoronavirus(PDCoV) in swine herds in Ontario, Canada
• Effects of gestation pens versus stalls and wet versus dry feed on air contaminants in swine production (Part 1)
• Effects of gestation pens versus stalls and wet versus dry feed on air contaminants in swine production (Part 2)

July

• Incidence Year 2017/2018 Annual Summary
• Actinobacillus pleuropneumoniae: a case of suspected lateral transmission (Part 1: diagnostics)
• Actinobacillus pleuropneumoniae: a case of suspected lateral transmission (Part 2: Outbreak Investigation)

August

• An Overview of Porcine Astrovirus
• African swine fever: a review
• Transmission and survivability of African swine fever virus
• Salmonella monophasic harboring plasmid-mediated resistance genes to enrofloxacin and ceftiofur is expanding in swine in the Midwest

September

• Within farm PRRS time-to-stability differences in sow farms in the Midwest
• African swine fever experience in a large commercial system in the Russian Federation
• Basic Steps for Foreign Animal Disease Preparedness
• Remembering Professor Mike Murtaugh

October

• Quarterly review of MSHMP reported PRRSv Restriction Fragment Length Polymorphism (RFLP) patterns
• Making epidemiological sense out of large datasets of PRRS sequences
• The effect of season on PRRS time-to-stability in the Midwestern United States
• Illegal importation of meat derived food products through passenger airline carriers and possibility of disease introduction

November

• Genomic basis of emerging enrofloxacin and ceftiofur resistance in Escherichia coli isolated from swine clinical samples collected across USA
• Protecting the Inevitable Risk: Biosecurity Evaluation at a Truck Wash
• Assessing the relative vulnerability of swine breeding herds to the introduction of PRRS virus
• Biosecurity screening tool: Benchmarking PRRSv biosecurity vulnerability using a short survey

December

• To filter or not to filter: that's NOT the question anymore! But what is the question then?
• African Swine Fever: Economics vs Pathology
• Project Invitation: Assessing withinͲherd PRRS variability and its impact on production parameters

2017

January

• 2016 Year End Summary of the Swine Health Monitoring Project
• How much does PRRS cost to the US?
• Nanotechnology sensor for the detection of influenza viruses in swine
• Time trend analysis of antibiotic resistance in beta-hemolytic E.coli isolated at the UMN-VDL

February

• Assessing anti-PRRS biosecurity: proof of concept phase
• Meet the new Associate Post-Doctoral Researcher at the SHMP, Juan Sanhueza
• Transport of weaned and feeder pigs
• Analyzing swine movement patterns using zonal neighborhood effect

March

• Controlling spread of PRRS virus within sow farms
• Introducing Paulo Fioravante, Our New Information Technology Director
• Unusual central nervous system cases
• Swine Health Monitoring Project: An Update
• Mycoplasma hyorhinis and conjunctivitis in pigs

April

• Measuring production losses from endemic PRRS in US sow farms
• M.hyopneumoniae outbreaks: what you need to know to aid in your investigation
• Evaluation of positive pressure filtration to reduce aerosol transmission of PRRSV during an experimental challenge of farm access points
• Creating really strong passwords

May

• Bob Morrison's legacy
• Antimicrobial resistant bacteria: what does that mean, and how does it affect me?
• EWMA all versus EWMA original 13
• How farm structure and demography impact disease detection

June

• PRRS Cumulative incidence by status
• Incide risk and incidence rate
• Continued reporting on unusual CNS cases
• High levels of dietary zinc under a cloud
• Portable device for influenza virus detection using GMR sensor

July

• Weekly report changes
• MSHMP Annual Summary
• Are the farms that broke with PED the same?
• Prevalence comparison among different MSHMP cohorts
• Antibiotic susceptibility in Pasturella multocida and Streptococcus suis isolated at the Minnesota VDL (2006-2016)

August

• Mycoplasma hyopneumoniae detection in nylon-flocked and rayon-bud swabs
• Analyzing swine movement patterns in relation to PEDV
• Evaluation of biosecurity measures to prevent indirect transmission of porcine epidemic diarrhea virus
• Are spatiotemporal clustering of PRRS consistent across years?

September

• Survey on Mycoplasma hyopneumoniae gilt acclimation practices in Europe
• Introducing the Secure Pork Supply
• Leman 2017 - A tribute to Bob Morrison
• Emerging Salmonella 4,[5],12:i: and antimicrobial resistance in Salmonella serovars isolated from swine in the Midwest
• Use of processing fluids for PRRSV diagnostics

October

• Introducing Dr. Cesar Corzo
• Describing the cull sow and cull hog market networks in the US: a pilot project
• Uterine prolapses trend in production sow herds
• Multiple influenza A viruses circulate in growing pigs during epidemic events.

November

• Natural and experimentally-induced Senecavirus A infections in boars
• Why PRRS elimination doesn't work in some herds
• Monitoring breeding herd production data to detect PRRSV outbreak
• Importance of birth weight and colostrum intake on piglet survival and growth performance

December

• PRRS eradication efforts in Chile: Current situation and future prospects
• Investigating PRRS summer outbreaks in the US
• Troubleshooting poor litter size within a production system using the National Swine Reproduction Guide
• Happy holidays
• Why are we not making more progress to decrease PRRS incidence?

2016

January

• Meet the team
• A case report describing recent outbreaks of PEDV and PDCoV - part 2: Potential role of feed
• Characterization of viral load, viability and persistence of influenza A virus in air and on surfaces in swine production facilities
• Senecavirus A case report, part 1: case description
• Porcine Deltacoronavirus: a case report

February

• Senecavirus A case report, part 2
• Senecavirus A case report, part 3: shedding study
• Indirect transmission of PEDV via personnel as fomites

March

• SHMP data integrity and security practices
• PDCoV update
• Descriptive analysis of PRRS for 3 control areas in the province of Ontario, Canada
• Modeling the transboundary risk of feed ingredients contaminated with PEDV

April

• Monitoring and updating the value of productivity losses due to PRRSV
• Detection of the emerging Senecavirus A in pigs, mice and houseflies
• Investigating an optimal seeder-to-naive ratio for Mycoplasma hyopneumoniae gilt exposure prior to entering the breeding herd
• Eliminating PEDV from the environment
• Network analysis of main service providers for swine herds participating in regional PRRS control programs

May

• Characterizing piglet loss from PRRS outbreak
• Economic analysis of vaccination strategies for PRRS control
• Economic analysis of vaccination strategies fro PRRS control, part 2

June

• Descriptive analysis of PRRS for 3 control areas in the province of Ontario, Canada - part 2
• Review of the SHMP charts, chart 1
• Review of the SHMP charts, chart 2
• Are these viruses becoming more common?

July

• PRRS RFLP 1‐7‐4: Time to Stability and Associated Risk Factors
• Swine Health Monitoring Project (SHMP) Annual Summary
• Review of SHMP Charts ‐ Chart 3 ‐ PRRS cumulative incidence by sow herd status at time of infection

August

• What does the “reproductive number” mean, how can it be used, and how does it contrast to “incidence”?
• The Wean‐down Project
• Interpreting PRRS ORF5 sequencing, can we do better?
• Phylogenetic relationships and percent sequence identity in combination with RFLP to interpret virus relationships

September

• Review of the charts of SHMP. Chart 4 ‐ PRRS quarterly count of breaks and chart 5 ‐ PRRS EWMA analysis for years 2009 ‐ 2017
• Prevalence Pie Charts for Different States
• Time Between Breaks by Status
• “Should I build my barn in the top of the hill or in the bottom of the hill?”

October

• Part ll‐“Should I consider planting trees around my farm?”
• Investigation of a novel U.S strain of highly pathogenic porcine reproductive and respiratory syndrome virus (PRRSV)
• “Will past disease outbreaks in my area tell me about my farm’s risk for the next one?”

November

• Seneca Virus A sero‐prevalence among a convenience sample of Sow herds in the US
• PRRS similarity visualization over time and space
• High Path PRRS virus

December

• “How can farm structure and demography influence pathogen persistence within a herd?”
• Do peaks in PRRS incidence occur at similar intervals across geographic regions in the US?
• Economic Implications of The Wean‐down
• Merry Christmas From the Swine Health Monitoring Group!
• Seneca Valley Virus

2015

January

• Vaccination with a genotype 1 modified live vaccine against porcine reproductive and respiratory syndrome virus significantly reduces viremia, viral shedding and transmission of the virus in a quasinatural experimental model
• Application of filter standards to evaluate used filters against PRRSV
• Scientific Opinion on porcine epidemic diarrhoea and emerging porcine deltacoronavirus
• The effect of disinfection practices on RT-PCR detection of PEDv
• Post-processing contamination chemical mitigation strategies to control PEDV in feed and feed ingredients

February

• University of Minnesota Risk Assessment of PEDV in Feed Ingredients of Porcine Origin – Looking for the “Take Homes”
• 55% --> 3% incidence!!
• Production Impact Update
• Changes in PRRSV incidence

March

• Risk factors for sow farms becoming chronically infected with PEDV
• Defining PEDV maternal immunity and correlates of neonatal protection
• Determining the minimum infectious dose of PEDV in a feed matrix
• SHMP update

April

• Spatial distribution of sow sites enrolled in the Swine Health Monitoring Program
• SHMP update
• Time to stability for PEDV in SHMP sow hards
• PRRS RFLP 1-7-4 summary

May

• PRRS 1-7-4 Sequence project
• Time to Baseline Production for PEDV - Key points
• Epidemiological factors associated to the spread of PED in Japan
• PRRSV diversity in the US based on RFLP patterns of samples submitted to the Minnesota VDL
• Prevalence of PRRSV decreased over time in herds undergoing Load-Close-Expose (LCE)

June

• What drives sample size for detecting a pathogen? Part 1
• What drives sample size for detecting a pathogen? Part 2
• PRRSV - Can we cut time to stable at weaning in half?

July

• July 1st starts our 2015-16 incidence year
• Do herds with different PRRS status get infected at different times of year?
• Immune status at exposure affects time to stability for PRRSV
• Correlation between time to stability for herds with two consecutive PRRS breaks
• Association between season and time to stability for PRRSV

August

• As prevalence of PRRSV at weaning decreases over time, does the amount of virus in those infected pigs also decrease?
• Association between the time between PRRSV infections and herd PRRSV status
• Correlation between the time between PRRSV infections and swine density
• A brief summary of SHMP

September

• Comparison of PRRSV incidence
• Spatial distribution of PRRSv in the upper Midwest
• Frequency of detection of Senecavirus
• Factors associated with epidemic transient neonatal losses in Brazil

October

• Temporal spacial patterns and risk factors of PRRSV and PEDV infections
• Frequency of PRRSV detected outside eight sow farms in swine dense regions of Minnesota part 1
• Frequency of PRRSV detected outside eight sow farms in swine dense regions of Minnesota part 2
• History of 119 filtered breeding farms in the US since 2015, part 1: PRRSV incidence
• Virulent PRRSV families come and go. Will the 1-7-4 family behave the same?

November

• History of 119 filtered breeding farms in the US since 2015, part 2: Facility modifications over time
• PRRS 1-7-4 time to stable and time to baseline production study: TT1 and TTS update

December

• SHMP update
• A comparison of sampling methods to detect PRRSV at farrowing
• Justification for PRRSV sampling at farrowing beginning 8 weeks post-detection
• A case report describing recent outbreaks of PEDV and Porcine Deltacoronavirus

2014

July

• Aerosol transport of PEDV: Determination of particle size associated with PEDV transport in the natural swine environment

August

• PEDV production impact study
• Understanding PEDV timeline of exposure based on clinical findings
• Characterization of the On Farm Aerosol for PRRSV: Identification of a Unique Particle Distribution
• Porcine Epidemic Diarrhea Virus RNA Present in Commercial Spray Dried Porcine Plasma Is Not Infectious to Naïve Pigs
• PEDV sessions at the 2014 Allen D. Leman swine conference

September

• Infectious dose of PEDV
• Previous infection of sows with a “mild” (variant) strain of PED virus confers significant protection against infection with a “severe” (prototype) strain
• Porcine Deltacoronavirus (PDCoV) – Fulfilling Koch’s Postulates
• Porcine Epidemic Diarrhea virus Antibody tests available at ISU-VDL

October

• An evaluation of a liquid antimicrobial (Sal CURB) for reducing the risk of porcine epidemic diarrhea virus infection of naïve pigs during consumption of contaminated feed
• Infectivity of Swine Manure from Pits at Varying Lengths of Time Post Infection with Porcine Epidemic Diarrhea Virus (PEDV)
• Porcine epidemic diarrhea virus infection: Inhibition by polysaccharide from Ginko biloba exocarp and mode of its action
• Swine Enteric Coronavirus Diseases international meeting
• Porcine epidemic diarrhea virus infects and replicates in porcine alveolar macrophages

November

• Survivability of porcine epidemic diarrhea virus (PEDV) in bovine plasma submitted to spray drying processing and held at different time by temperature storage conditions
• Genetic diversity of PRRS virus collected from air samples in four different regions of concentrated swine production during a high incidence season
• The pathogenesis and characterization of porcine epidemic diarrhea virus (PEDV) and porcine deltacoronavirus (PdCV) in neonatal gnotobiotic swine
• Time-to-stability update

December

• Methods for inactivating PEDV in hog trailers
• Spread of Porcine Epidemic Diarrhea virus
• Novel Porcine Epidemic Diarrhea virus variant with large genomic deletion, South Korea