Take control of Staph. aureus mastitis
Herdscreen is a fast, accurate whole-herd test that identifies cows infected with Staph. aureus — even those showing no visible signs. Reset and manage your herd, regain control, protect performance, and restore peace of mind when Staph. aureus is holding you back.
Protect your herd
Peace of mind
Gold standard tech
Protect your herd
The Herdscreen advantage
“Not a single mastitis case since the Herdscreen — I never thought this was possible”
- Tony Hollinshead, Dairy Farmer, 300 cows, Matamata, Waikato
Challenges of Staph. aureus
When to consider a Herdscreen
Do a Herdscreen® when Staph. aureus is affecting mastitis, milk quality, or culling—and you’re ready to act.
We usually start with a Snapshot® test to pinpoint all mastitis challenges and prioritise the actions that give the best return. Not every herd needs a Herdscreen® immediately. If timing or key steps like cow segregation aren’t feasible, we focus on practical measures now and guide you toward long-term solutions when you’re ready.
"It’s an easy process to follow and has helped us target antibiotic use while cutting on-farm drug costs."
- Todd Mancer, Contract Milker, 850 cows, North Canterbury
Simple pricing. Clear return.
Herdscreen® is offered at a fixed price of RRP $15 + GST per cow, covering individual cow sampling, validated laboratory culture, and clear reporting to support informed herd-level decisions.
By identifying infected cows — including low-SCC subclinical carriers — Herdscreen enables targeted, proportionate action rather than blanket interventions. Its value lies in precision: earlier detection, better prioritisation, and decisions grounded in pathogen data, supporting milk quality, animal health, and responsible antibiotic use.
Herdscreen is most effective when used within a broader mastitis management strategy, often following a Snapshot® herd overview to focus action where it delivers the greatest return.
Herdscreen process
Simple, science-backed process
Sample collection
Lab analysis
Results
1. Aseptic sampling
We organise individual-cow aseptic sampling in a single milking, supplying a complete sampling kit with step-by-step instructions and on-farm support to ensure the process runs smoothly.
2. Laboratory analysis
We fly your samples to our Hamilton lab, where our team of microbiologists uses high-tech, gold-standard culture methods for precise analysis.
3. Results & management plan
Within 48 hours receive a detailed report. Discuss next steps with our team and your vet.
Real farmers, real results
Used and trusted by dairy farmers nationwide
“With Farm Medix, we can identify exactly what bugs we’re dealing with, treat cows proactively, and use fewer antibiotics. It’s given us control!"
- Jim van der Poel - Owner of multiple farms in NZ and in the USA
"Farm Medix turned our mastitis worries into confidence — now we manage with knowledge, ease, and better results!"
- Sarah Smart - Farm Manager, 645 cows, North Otago
"We are so happy! Working with Farm Medix, we are on top of things and looking forward to next season!" Mastitis doesn't stress us now.
- Phil and Jenny Taylor - 440 cows, Morrinsville, Waikato
"Mastitis doesn’t have to be stressful. With Farm Medix, we’ve reduced our mastitis levels to less than 5%, reclaimed time, and improved efficiency"
- Longburn Farm - 900 cows, Manawatu, Palmerston North
“Farm Medix empowers us to farm confidently, make informed decisions, and achieve greater efficiency across the farm."
- Holly & Aaron Jackson - 380 cows, Culverden, Canterbury
"Choose Farm Medix, the peace of mind and savings you gain
from knowing exactly what you’re dealing
with, combined with 7 day support
is invaluable!"
- Jenny Buckley & Dave van den Beuken - 370 cows, Cambridge, Waikato
“With Farm Medix, we have the tools and resources to control mastitis. The support they provide makes all the difference!”
- Sian & Logan Dawson - 840 cows, Ohaupo, Waikato
“With Farm Medix help, we’ve reduced antibiotic treatments from 109 cows to just 12 — and production is up 6%.”
- Andrew Hardie & Helen Long - 430 cows, Manawatu, Whanganui
“Doing the Herdscreen® wasn’t hard — what’s hard work is mastitis. Thanks to Farm Medix, we finally took control.”
- Tony Hollinshead - 300 cows, Matamata, Waikato
Herdscreen FAQs
We’ve pulled together the most common questions farmers have about Herdscreen
When to test?
Should I Herdscreen regularly?
Does positive = cull?
Is herd testing enough to control Staph. aureus?
Is Herdscreen difficult?
Does the intermittent shedding of Staphylococcus aureus affect the accuracy of testing for infection?
First, assess your situation—you may or may not have a Staph. aureus issue. Based on your circumstances, objectives, and ability to act, we’ll help you decide if whole-herd screening is relevant. Only Herdscreen when necessary to reset your herd, then use FCDC (Fresh Cow Dry Cow) on-farm mastitis kits to test any new or suspect cows.
No. Herdcreening should be a one-time event, not a repeat or yearly process. We help you do it well to do it once.
No. There are many options depending on your situation. We make sure findings are reviewed with your vet to help you reach your goals. Treatment, cow segregation, and milking positive cows last can successfully manage carriers. Herdscreen is more than a test, it’s all about putting you on a long term successful path.
No. SCC indicates inflammation but not which pathogen or if it’s contagious. Shared clusters and low-sensitivity PCR tests (70%) mean many Staph. aureus carriers go undetected.
No. On average sampling extends a single milking by one hour. Our aseptic sampling method follows gold-standard guidelines to protect the quality of your results.
Scientific research demonstrates that although the concentration of Staph. aureus in cow’s milk varies intermittently over time, the infection status of the cow can still be determined with a high degree of reliability.
Take control of mastitis in your herd
Transforming herd health — backed by science.
