dr. jeremy van boening - field perspective – sample handling & collection
TRANSCRIPT
Trichomoniasis
Field Perspectives
Jeremy VanBoening, DVM
Trichomoniasis Involvement
• Clinical Practice
• Nebraska Cattlemen-NCBA
• Nebraska Veterinary Medical Association
Sample Collection
Texas A&M Trich Sample Collection Video
Sample Collection ChallengesSurvey of 10 D-Labs 10-14-2013
Lab IDDo the samples need to be
incubated?
Do the samples need to be put on ice
when shipped?How many samples can be pooled? Preferred collection medium?
A Yes 24hrs Yes Up to 5 tubes
B No No, dark and warm packaging Up to 5 InPouch
C No, room temp No Up to 5, but not recommended InPouch
D
You can if you want, just state on
submission form if you incubated
samples or not. Have to receive
samples within 72hrs of collection.
If cold outside put a thawed ice pack. If
hot outside put ice pack but not directly
on samples
Up to 5 InPouch or tubes
E No, room temp, ship same day No No pooling InPouch
FYes or No, state on form if you did.
Has to arrive at lab within 120hrs
after collection.
No Up to 5 InPouch
G No cold pack Up to 5 Scraping in 5ml of Saline placed in tube.
H No No Up to 5 InPouch
I No No, room temp No pooling InPouch
J No, ship overnight Yes Up to 3 wash in red top tube with saline
Summary of PCR Related Questions
Incubation Yes= 2 No=6 Your Choice=2
Ship on Ice Yes=2 Room Temp=6 Other=2
Pooling Up to 5=7 No Pooling=2 Up to 3=1
Preferred Collection Media In Pouch=6 Saline=2 Tubes=2
Sample Collection Challenges
Restraint and Safety
Is this safe??
What Collection Method
1. preputial scraping with pipette
2. preputial scraping using thrichit
3. saline rinse
4. swap or scraping of the penis
NO BLOOD for Either PCR or Culture
Sample Collection Challenges
Cleanliness
Field Collection Area
Scissors (Disinfect or Not and with what?)
Access to saline for rinsing
Dirty Samples
• Rarely if Ever Return Positive
• Recent Study Hustun, etal. MSU
– 20 Samples w/ bacteria injected at increasing #’s
– 20 Samples clean (Only T. Foetus Added)
– 0 of 20 with bacteria ever recorded as positive
– 20 of 20 w/out bacteria had at least one positive recording
Sample Collection ChallengesProper Collection Media
Sample Preparation
Depends on the D-Lab!!
Collection Medium (In-Pouch, Tubes, Saline)
Incubate or Not
• Depends on D-Lab, PCR or Culture,
How should the sample be packaged?
• On Ice, Room Temperature, Or Depends on the Weather
Transportation Issues
• Rural Access to Timely Reliable Transportation
• How to package and send samples?
– How long can they be in transit and at what temperature?
– Sensitivity and Specificity go down for both culture and PCR Hustun etal MSU
How Do We Get Better????
Standardization
1. Adopt the Best Diagnostic Testing Available (qPCR) Using Chemical-Lysis and IAC.
2. Promote SOP’s for Sampling, Sample Prep, and Shipping
3. Increased Veterinarian/Producer Awareness
4. Standardized Regulations