“no needles, please. cost and effectiveness of needle- free...
TRANSCRIPT
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J. Bret Taylor Range Sheep Production Efficiency Research Unit
US Sheep Experiment Station USDA, Agricultural Research Service
(208) 374-5301 [email protected]
“No needles, please.” Cost and Effectiveness of Needle-
free Vaccination
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Antib
ody
titer
Day
Needleless Needle
Needle-free vs. Needle-Syringe vaccination
Michelle Mousel, ADRU-Pullman (Mousel et al., 2008. J ANIM SCI 86:1468-1471)
Primary
Secondary
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Needle-syringe technology: Cons
Use problems – Hand fatigue – Unwanted punctures and scratches
Malfunctions – Broken needles – Some failed minor components (e.g., seals, rings)
Disease – Multi-use needles: horizontal transmission risk
Cost – Single-use needles: expensive ($ .12 to .21/hd)
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Needle-syringe technology: Pros
Efficacy – Outstanding; needle vaccination is the “gold” standard
Replacement cost – Repeater syringes and preventative maintenance kits are
reasonable ($22 to 70) Disease
– Single-use needles: zero horizontal transmission Needle cost
– Reasonable for multi-use needle strategies
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Needle-free technology: Cons
Use problems – Heavy if mobile (>15#)
Malfunctions – Some system freezing
Caused by cold weather and (or) system gas pressure release
– Some failed minor components (e.g., seals, rings) – Maintenance parts not at the “local” supply store
Cost – Initial investment is seemingly expensive ($3,000)
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Needle-free technology: Pros
Ease and Safety of use – So easy that 8 out of 10 sheep can operate it – No “friendly fire”; if it happens, someone doesn’t like you
Malfunctions – Infrequent and easily remedied with preventative
maintenance Disease
– Zero horizontal transmission Cost
– Over the long run, cheaper than single-needle strategies – Preventative maintenance, $20 - 50/year based on 3,000
uses
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Needle-free vaccination: Pulse NeedleFree Systems, Lenexa, KS (Pulse 250)
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Needle-free vaccination: Fixing the “freeze problem”
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Our goal: Employee safety, method efficacy, animal welfare, and cost savings
Purchased needle-free in 2005 – NeedleFree Systems, Pulse 250, Lenexa, KS
Give ~7,000 injections annually – ~2,000 hd flock – Maintained original unit
Needle-free vaccination: Our vaccination stats
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9-year summary A B C
System Multi-use stainless
needles Single-use
disposable needles Needle-free pneumatic
Unit Repeater-type
Syringe Repeater-type
Syringe NeedleFree Systems,
Pulse 250
Initial cost $60 $60 $2,900
9-year maintenance cost
$360 $360 $540
9-year needle cost $1,620 $6,480 $0
9-year CO2 cost $0 $0 $360
Total 9-year cost $2,040 $6,900 $3,800
Annual system cost $227 $767 $422
Annual system cost with labor-savings
$291 $927 $422