Thursday, 25 April 2024 12:55

Vaccinate against new lepto strain

Written by  Staff Reporters
Vet Nathan Back. Vet Nathan Back.

A vet is calling for all animals to be vaccinated against a new strain of leptospirosis (lepto) discovered on New Zealand dairy farms in recent years.

Nathan Back, DairyVets says the new ‘Pacifica’ strain of the bacterial disease has recently become more common in NZ. A new cattle vaccine, Lepto 4-Way, has been developed to provide an immune response against this strain and is being recommended by Back.

Back says the decision to switch leptospirosis vaccines is to better manage the risk that leptospirosis is now presenting on farms and within the local community.

“This is particularly important for people working within our practice and farms – farmers, farm workers, vets and technicians.

“To reduce this risk, we feel that all animals on farms – cows, pregnant heifers, calves and other stock – should be vaccinated with Lepto 4-Way for the coming season and this is the vaccine we will be using.”

Leptospirosis is caused by a bacteria that are spread from animal to human. Lepto is contracted most commonly through exposure to the urine of infected animals, either through direct contact or via contaminated water. The bacteria enter through cuts or grazes on the skin, or through the mucous membranes of eyes, nose and mouth.

Matt Wells, technical veterinarian at Virbac NZ, the registerer and distributor of Lepto 4-Way, says that in recent years New Zealand has seen an increase in cases of lepto in farmers and staff working on vaccinated farms, many of which are thought to be due to the new Pacifica strain.

Wells says vaccination of the herd is one of the most robust ways to reduce the risk of leptospirosis coming into the herd as well as rodent control, hygiene and personal care when working closely with animals and on farm, and other measures such as the fencing off access to waterways and strict control around effluent spreading.

All animals in the herd will need two doses of the vaccine: an initial dose, then a booster about four to six weeks later. This will include all pregnant cows, pregnant heifers (R2) and all replacement heifer calves, which will provide the necessary immune response against the new strain.

Wells says the impact lepto can have on farm is devastating, with severe flu symptoms in humans and in some cases debilitating illness requiring hospitalisation. A recent survey conducted by Massey University showed that half of those affected were still experiencing symptoms a staggering eight months after diagnosis.

There are different types of lepto, with cows often showing no clinical signs. This means that working with dairy cows can pose a significant risk for contracting lepto, so preventing exposure is vital.

“Since the 1970s we have been fortunate to have highly effective cattle vaccines, which have reduced the rate of human infections dramatically.

“Unfortunately, in recent years we have seen cases of lepto in farmers and staff (including teat sealing technicians) working on vaccinated farms, many of which are thought to be due to the newly discovered strain of lepto within our dairy herds. This new strain, known as Pacifica, wasn’t covered by the traditional dairy cattle lepto vaccines. Recent research suggests Pacifica could be present in almost three quarters of dairy herds throughout New Zealand.

“The new cattle vaccine, Lepto 4-Way, has recently been developed to provide an immune response against the emergence of Pacifica as well as the 3 strains (Hardjo, Pomona & Copenhageni) previously covered by the traditional vaccines. Sharing a similar mindset to Nathan at DairyVets, farmers and vets throughout the country have been choosing to switch or upgrade their lepto vaccine and vaccinate their cattle with Lepto 4-Way since it became available early February,” Wells says.

More like this

Learn how to tackle Lepto

Leptospirosis is widespread on New Zealand livestock farms and a webinar hosted by Zoetis on March 19 will provide resources and insights into understanding and preventing the disease.

Learn how Lepto could be impacting your farm

Leptospirosis is widespread on New Zealand livestock farms and a webinar, hosted by Zoetis on March 19, will provide resource, and offer insights into understanding and preventing the disease.

Keeping leptospirosis at bay

Leptospirosis (lepto) is a disease caused by bacteria that can be spread from animal to human, otherwise known as a zoonotic disease.

Lepto study reveals new challenges

A large new study into leptospirosis in NZ has revealed new facts about how this infectious disease may be caught by various people working in the rural sector.

Featured

Home detention for animal neglect

A Taranaki dairy farmer received four-month home detention and was disqualified from overseeing of animals for 18 months over a lack of feed and welfare which led to some animals being euthanised.

Flock House and its secrets

Plans are in place to celebrate the 100th anniversary of the legendary Flock House opening its doors for the first time.

$160 billion cargo shipment deal

New Zealand’s major primary industry exporters have secured shipping capability to export $160 billion worth of products over the next 10 years.

Play by the rules

Trade and Agriculture Minister Todd McClay says the Government is always working to ensure that our food exporters are treated fairly under trade agreements signed with other countries.

National

Machinery & Products

GPS in control

In a move that will make harvesting operations easier, particularly in odd-shaped paddocks, Kuhn has announced that GPS section control…

» Latest Print Issues Online

The Hound

True colours

OPINION: The watermelon party (AKA the Greens) try to portray themselves as an upright, self-righteous, caring bunch of woke, bicycle-riding…

Peace at last?

OPINION: Good news for hunters as Forest & Bird have "paused" legal action against the Fiordland Wapiti Foundation and agreed…

» Connect with Rural News

» eNewsletter

Subscribe to our weekly newsletter