Oct 2023 - Journal Final - Flipbook - Page 6
Health
National PRRS incidence/prevalence: July 2023 - June 2024
It’s that time of year again - biosecurity solutions
40 out of 40 systems contribute data to charts 1 and 4. 32 of these 40 follow or are adapted to the AASV PRRS classi昀椀cation and contribute data to charts 2 and 3. Chart 1
monitors the 2023-2024 cumulative incidence in RED. Chart 2 shows prevalence of herd statuses over time beginning July 2009. Chart 3 shows incidence rate of PRRS statuses
per farm-week for the season 2023-2024. Chart 4 is the exponentially weighted moving average (EWMA) epidemic monitor. Numbers and geographic representation of herds
change over time, so direct comparison across years should be made with caution. Disclaimer: All companies report regularly but at di昀昀erent frequencies.
FOR WEAN-TO-FINISH SYSTEMS
Breaks
New breaks
Previous breaks
Systems reporting
Number
0
2
31
Break status
1-2
0
2
N week
N 23-24
1-2fvi
0
1
Status change
2-3
2fvi-2
0
0
8
0
2fvi-3
0
0
2vx-2
1
1
2vx-3
0
0
3-4
0
4
Chart 2 − PRRS prevalence of sow herd status beginning July 01, 2009
Chart 1 − PRRS cumulative incidence beginning July 01, 2009
Cameron Schmitt, DVM
Veterinarian
PRRS season
09−10 Pipestone Veterinary Services
10−11
1-2vx
0
9
Dr. Cameron Schmitt was raised in central Iowa and is a second
generation large animal veterinarian. Dr. Schmitt joined PIPESTONE in
2002 after graduating from Iowa State University .
80
11−12
12−13
13−14
14−15
15−16
16−17
17−18
18−19
19−20
20−21
21−22
22−23
23−24
70
Jun−21
Jun−28
Jul−05
Jul−12
Jul−19
Jul−26
Aug−02
Aug−09
Aug−16
Aug−23
Aug−30
Sep−06
Sep−13
Jul−2009
Feb−2010
Sep−2010
Apr−2011
Nov−2011
Jun−2012
Jan−2013
Aug−2013
Mar−2014
Oct−2014
Jun−2015
Jan−2016
Aug−2016
Mar−2017
Oct−2017
May−2018
Dec−2018
Jul−2019
Feb−2020
Sep−2020
May−2021
Dec−2021
Jul−2022
Feb−2023
Sep−2023
to-implement solutions that do
Unfortunately, summer is
What can be done60to reduce
infectious disease movement in
not cost a lot of money.
over and the fall season is upon
wean-to-昀椀nish systems?
us, followed soon by winter.
From a disease management
Changing this paradigm will
perspective, it is also the season
take
a commitment by producers
when major swine pathogens
to
make
an impact – it won’t
get a break from the sun and
be cheap, but it is costing our
heat. Typically, as barns start to
industry >$1B/year with some
close up and we enter minimum
Chart 3 − PRRS incidence rate beginning July 1, 2023
estimates
as high as $1.5B.
ventilation
rates overnight,
Cases per
Cases per
Outbreak status
Classi昀椀cation scheme
Status
farm-week
farm-year
1
Positive Unstable
1
0
0
respiratory disease is not far
Positive Stable, 昀椀eld virus exposure
2fvi
0.001 At PIPESTONE
0.0537
we have 2fvi
2vx
Positive Stable, live virus vaccinated
2vx
0.0032
0.1677
away.
Positive Stable
2
0.0028
0.1433
implemented
an ongoing 23
Provisionally Negative
3
0
0
4
Negative
4
2e-04
0.0119
wean-to-昀椀nish biosecurity
Seasonally, the industry enters
Recent PRRS EWMA
survey for many of our clients
the annual epidemic phase of
18
and shareholders, delveoping
16
PRRS and other diseases between
a
scoring
system
to
see
how
mid-October and mid-November
they rank amongst their peers.
8
(see PRRS EWMA analysis from
6
When we analyze the results, this
SHIC’s MSHMP report 7/28/23).
scorecard provides some easyChart 4 − PRRS EWMA analysis for years 2009 − 2023
Month
2.5
EWMA
Epidemic Threshold
20
Number of Breaks
Frms 347 Frms 351 Frms 396 Frms 454 Frms 701 Frms 819 Frms 867 Frms 909 Frms 944 Frms 1011 Frms 1002 Frms 997 Frms 996 Farms 1024Farms 1038
16
14
1.5
12
10
8
1.0
04−Nov
6
20−Oct
16−Nov
0.5
17−Oct
23−Oct
26−Nov
11−Nov
23−Nov
01−Nov
24−Oct
06−Nov
05−May
28−Oct
13−Oct
4
02−Nov
2
This graph highlights the seasonal increase of PRRS and other disases.
6 | PIPESTONE JOURNAL
Sep−2023
Feb−2023
Jul−2022
Dec−2021
May−2021
Sep−2020
Feb−2020
Jul−2019
Dec−2018
May−2018
Oct−2017
Mar−2017
Aug−2016
Jan−2016
Jun−2015
Oct−2014
Mar−2014
Aug−2013
Jan−2013
Jun−2012
Nov−2011
Apr−2011
Sep−2010
Feb−2010
0
Jul−2009
0.0
Weekly number of new cases
EWMA weekly % cases
18
2.0
