DECEMBER SVC NE WSL ET T E R 2010 SWINE VET CENTER, P.A. 1608 SO. MINNESOTA AVE. P.O. BOX 269 ST. PETER, MN. 56082 PHONE: 507-934-3970 www.swinevetcenter.com FAX: 507-934-3968 THANK YOU!! SVC thanks you for your business and we’ll do our best to earn it in 2011! Here’s to a happy, healthy and safe New Year! PRRS VIRUS BIOSECURITY REMINDERS With a dramatic increase in PRRS virus diagnoses over the last two months throughout the Midwest, farm biosecu- rity has become a primary talking point during our farm visits. Discussion often focuses on the potential routes of virus entry into a farm and laying out the best practices to reduce the risk these entry points pose. Drs. Brad Leu- werke and Jeff Feder came up with the following biosecurity checklist for farms to consider as part of their herd biosecurity plan. PRRS PRRS virus survives months to years in freezing conditions. Virus in snow on the bottom of a shoe or boot can be tracked directly into a barn and infect pigs. Prevent the farm’s entryway from being the source of virus entry. □ Install a bench system at the main entry area of the farm that allows staff to leave footwear at the entryway, keeping the area behind the bench and within the shower rooms free of outside moisture and dirt □ Dryness cuts PRRS virus survivability down to minutes. Put a space heater or fan within the entry area to dry the wet entryway flooring throughout the day to eliminate infectious virus Prevent unauthorized barn entry. □ Check that all outside access doors are locked from the inside □ Lock all shower doors from the inside and require visitors to call for farm entry permission □ Inform truck drivers where the clean-dirty line exists and do not allow them entry into the barn Restrict non-emergency points of exit from the barn and remind staff of risks □ Is there a protocol for the maintenance of outside equipment such as checking feed bins? Showering out and back in has the least risk □ Post staff biosecurity reminders at each exit point For your farm, what potential risks are at the cull sow or weaned pig load-out area? □ Make sure trailer has been washed, disinfected, and dried. Refuse dirty trailers. Avoid use of the drivers loading equip- ment (panels, paddles, prods, etc) □ Does a clean/dirty line exist and does the facility design easily allow for this to be maintained when loading □ Driver stays in trailer and keeps pigs from coming back off trailer. Dead removal: Composting is a better choice of dead disposal than rendering for biosecurity reasons. Use the clean/dirty line when removing deads Gilt entry □ Is there gilt isolation and is there a blood-testing plan in place to prevent PRRS virus entry into the farm? Semen from an infected stud can carry PRRS virus □ Does the stud you use have a testing plan in place that ensures you are using uninfected semen? Supplies, tools, lunches, etc □ Is there a protocol in place for supply entry? Fumigation, or dry down time. (CONTINUED ON NEXT PAGE) PRRS VIRUS BIOSECURITY REMINDERS—CONTINUED Bird, rodent and insect control □ Is bird-netting over outside soffits and/or curtains intact? □ Is junk picked-up throughout the farm and a baiting plan in place? □ If flies or gnats have been a problem, have pits been agitated well to minimize pit crusting and consider use of a pit additive. Aerosol □ In pig dense areas aerosol transmission of viruses is a concern. Talk to your SVC Veterinarian about the benefits and costs that go along with filtration of farms. Windbreaks are also helping to reduce aerosol transmission in tunnel barns. Work with your SVC veterinarian to further customize your herd’s biosecurity program to reduce risks of becoming infected with this devastating virus. ANTIBIOTIC USE IN THE NURSERY—TRIAL RESULTS At the 2010 Kansas Swine Day, a trial measuring the performance of health challenged pigs assigned to one of four antibiotic treatments was summarized (Sotak, K.M. et al). 880 pigs averaging 18 days of age (that were positive for PRRS virus) were randomized upon nurs- ery entry into groups for a 41 day feeding trial. A comparison of mortality, performance and treatment cost was made between each feed medication program trialed. All diets were the same except for the addition of an antibiotic for each treatment group summarized below: Group Description % Mortality (d 0-41) ADG (d 0-41) F/G (d 0-41) $ Feed/Lb Gain (d 0-41) No medication d 0-41 5.1 0.72 1.56 0.25 35g Den/400g CTC d 0-41 1.7 0.83 1.46 0.25 363g Pulm d 0-10, 6.2 0.74 1.47 0.27 181g Pulm d 11-41 200g Den d 0-10, 1.1 0.83 1.50 0.26 35g/400g DCTC d 11-41 35g/400g DCTC d 0-10, 4.5 0.83 1.49 0.26 200 g Den d 11-20 DCTC d 21-41 Nursery mortality was lowered in 3 of 4 treatment groups compared to controls. Similar to other feed antibiotic trials, nursery groups receiving a medicated diet had improved ADG and F/G compared to non-medicated controls. Within treatment groups, the additional cost of adding an antibiotic to the diet was offset by the improvement in F/G, resulting in a similar feed cost per pound of gain for all groups. This trial demonstrated that health challenged pigs perform better when receiving a medicated diet. Excluding the control group, differences between the antibiotic treatments in this trial may have been related to the type and susceptibility of secondary bacte- rial pathogens within this nursery group. Your SVC veterinarian can help you determine which antibiotic will fit best in your nursery feeding program. ACCEL—A NEW DISINFECTANT NOW AVAILABLE IN USA “ACCEL” is an accelerated hydrogen peroxide disinfectant commonly used by Canadian swine producers and now it’s available in the U.S. It’s 5% hydrogen peroxide that’s been modified in such a way that the oxygen it produces is incredibly pure—so pure that it kills pathogens remarkably well, including even the most difficult bacteria (mycobacteria) and viruses (including PRRS virus). Besides being a broad spectrum disinfectant, ACCEL is also: A powerful cleaner that’s capable of penetrating organic material left after cleaning. It’s also a powerful deodorizer. Much faster acting than most other disinfectants, needing just 5 minutes contact time vs. 10 minutes for most other disinfectants. The “Ready to Use” formulation disinfects in just 1 minute. Safer for humans and livestock with an EPA Category IV rating, the safest available standard stipulating that no protective equip- ment is required during use. Very environmentally friendly...when the active ingredient dries, it is converted to just water vapor and oxygen. ACCEL is available in 32 oz RTU bottles, in concentrate form (1, 5, and 55 gallons) and also as disposable wipes. Contact SVC for more information! DR. LAURA SCHULZ FEATURED IN FARMERS FEED US CAMPAIGN SVC’s Dr. Laura Schulz participated in a video spot for the “Farmers Feed Us Campaign”, shot on location at Rebco Pork in Courtland, MN. She does an excellent job of explaining what a veterinarian’s role is on today’s hog farms. To view, go to: http://www.porknetwork.com/NLA_Tue.aspx?oid=1291153&tid=Archive Thanks Laura! SVC Office Hours: Monday through Friday 7:30 AM to 5:00 PM No portion of this newsletter may be used/copied without the written consent of Swine Vet Center.
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