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The ABC’s of Gilt Entry: Acclimation, Biosecurity, and ConvalescenceDr. Wesley Lyons
The ideal gilt
The ideal gilt: Reaches sexual maturity early Is not overly conditioned Is exposed and acclimated to the farm bugs Does not bring any “new” bugs to the farm Is fully vaccinated prior to breeding Maintains structural and reproductive soundness throughout the GDU
period and beyond
The ideal gilt
ATM- Gilt Management Series
Drs. Billy Flowers, Jenny Patterson, and Noel Williams
Birthweight influence on lifetime performance
Importance of nutrition and weight at breeding (not as important
as age)
Frequency and adequacy of early boar stimulation
Framing the conversation
Acclimation: the process in which an individual organism adjusts to a gradual change in its environment, allowing it to maintain performance across a range of environmental conditions
Biosecurity: the sum of the measures taken to prevent disease introduction or spread within a farm
Convalescence: the period needed to return to health after an illness
Acclimation: exposure and vaccination
“”
Exposure: The devil we know… and some we don’t.
-Dr. Kent Schwartz
Exposure: the bucket model
Major Pathogens Knowns and Unknowns
1. PRRSV*2. PEDV3. PDCoV4. TGEV5. APP6. Brachyspira spp.7. Mycoplasma
hyopneumoniae*
1. Other Mycoplasmas2. HPS3. Strep4. A. suis5. IAV-S6. Rotavirus7. E.coli8. Clostridium spp.9. Salmonella spp.10.Parvovirus11.Others
*Depends on herd status
Exposure: the how to’s
Feedback- all about quality, quantity, and timing Quality: “the devil you know”
Handling and kind of material Quantity: adequate amount for the number of gilts Timing: Boosting immunity without hindering performance
As soon as possible after clearing isolation period* Other exposure methods
Live animal introduction Intratracheal inoculation
“”
An ounce of prevention is worth a pound of cure-Benjamin Franklin
Vaccinations for the arriving gilt
Must haves: Circovirus Parvovirus Erysipelas Mycoplasma hyopneumoniae Lawsonia Leptospirosis?
Dependent on herd status: PRRSV Influenza
Biosecurity: bioexclusion and internal biosecurity
Bioexclusion: keeping the bad bugs out
1. Know your source
2. Double check your source
Bioexclusion: know your source
Vet to vet communications
Herd health profile
Alerts for any status changes
Bioexclusion: double check your source
Test gilts for major pathogens after arrival PRRSV PED/PDCoV Kind of testing*
Test again prior to entry for “late bloomers” Mycoplasma hyopneumoniae
Internal biosecurity: protect this house
New gilts to be treated as foreign until clearing health tests Follow best biosecurity practices
Shower-in/shower-out Chore at the end of the day Educate and re-educate personnel
Convalescence: natural and interventional
Major Pathogens Knowns and Unknowns
1. PRRSV*2. PEDV3. PDCoV4. TGEV5. APP6. Brachyspira spp.7. Mycoplasma
hyopneumoniae*
1. Other Mycoplasmas2. HPS3. Strep4. A. suis5. IAV-S6. Rotavirus7. E.coli8. Clostridium spp.9. Salmonella spp.10.Parvovirus11.Others
*Depends on herd status
Convalescence: natural
Timeline of shedding
IAV-S~8 days
PRRSDependent on vaccination (~60 days)
M. Hyop~256 days
Coronaviruses, HPS, A. suis, Rotavirus
Other Mycoplasmas, Salmonella, E.coli
Convalescence: interventional
Booster vaccinations: HPS, Influenza, PRRSV, E.coli
“Cool down” antibiotics: Broad spectrum Goal to decrease shedding prior to herd entry
Sow how long is this going to take, doc?
Test for PRRS & Coronavirus 3
Day zero
Summary of events
Begin with healthy gilts Prove health status of supplier with testing
Acclimate with correct material at the right time Vaccinate for the diseases your herd has Build in a “cool down” convalescence time with antibiotics and
booster vaccinations Walk, don’t run
Questions?