Preventing other disease

We can help you develop animal health and vaccination plans to prevent clostridial disease, leptospirosis, rotavirus, salmonella and BVD on you farm depending on the risk these disease pose to your operation.  We also offet the most current and practical advice on BVD testing and control, facial eczema control and parasite management.

BVD 

BVD infection in adult dairy cows can cause reproductive wastage, weight loss and reduced milk yield.  BVD also causes immune suppression, meaning cattle that have an active infection will be more likely to succumb to other diseases.  BVD infection can have major impacts during mating and pregnancy.  It can cause infertility, embryo loss, abortions (slips), small slow-growing calves, deformed calves, and the birth of dead calves.  The most damage is done when BVD infects pregnant cows.  If a cow contracts BVD i the first 4 months of pregnancy, she may give birth to a Persistently Infected (PI) calf.  PI animals are the main source of infection within the herd.

The main effects of BVD on your farm are:

  • Depressed herd reproductive performance.
  • More cases of general disease in cows and calves (mastitis, scouring, pneumonia etc.
  • Reduced milk production
  • Reduced growth rates in young stock.

For more detailed information, consult with your vet at Tararua Veterinary Services.  Follow the link to the side to the Control BVD website or watch this very informative BVD video clip (click here).

Cattle Vaccinations

  • 5 in 1

Protects against sudden death caused by clostridial organisms found in soil.

2 vaccinations 4-6 wks apart with annual booster

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  • Rotovirus

Causes calf scours in newly born calves. Vaccination 3-12 weeks before calving boosts the cows immunity and antibodies are passed to calves via colostrum. Vaccination greatly reduces calf scours

  • Leptospirosis

Bacterial disease which causes serious health problems for both animals and humans. Vaccination can be combined with 5 in 1 and requires a vet to give it due to OSH regulations associated with lepto. Lepto may cause abortion and sudden death in cattle as well as serious illness in humans. Lepto can be spread by rats and pigs.

  • BVD

Bovine virus diarrhoea is a viral disease which causes ill-thrift, scouring and death in young stock < 24 months. It also contributes in poor in-calf rates and can cause abortion. Best to assess antibody status of herd before commencing vaccination

  • Johnes

Incurable bacterial disease which causes ill-thrift and scouring. Affected animals tend to waste away. Bacteria is passed in the faeces and disease is spread by other animals ingesting it. As the disease progresses more bacteria is spread. Affected animals should be culled as they spread the disease. Studies now show that calves born to affected cows already have to disease. The onset of disease is often triggered by stress. Vaccination is an option but not in areas such as this with high TB prevalence as it interfers with TB testing

 

Lungworm in Calves

Several summer outbreaks of lungworm in recently wormed calves is a timely reminder that this disease has not entirely disappeared in spite of the availability of modern anthelmintics. All currently used drench families are highly effective against both immature and mature lungworm with some having label claims of extended activity (28 – 42 days) against re-infection. There have been no known cases of drench resistance by lungworm in New Zealand.

Mild cases of lungworm may result in some coughing and little else, while heavy infestations cause severe respiratory distress with breathlessness, coughing, often with the tongue out, weight loss and death. Severity of the disease is directly related to the number of larvae ingested. It is important to remember however that most cases of coughing in young calves locally is enzootic pneumonia due to viral and/or bacterial lung infection. If a drench doesn’t stop the coughing, get the calves checked.

Lungworm larvae can survive on contaminated pastures for long periods and will readily survive from one year to the next in calf paddocks. This may be exacerbated when autumn-born calves also have been reared. Rotating calf paddocks from one year to the next is a prudent precaution and may also help reduce other diseases such as coccidiosis.

We recommend all calves are drenched every 4 weeks over the summer and autumn period with an oral combination drench. Over the late autumn and winter drenches can be spaced at wider intervals and pour-on or injectable products may need to be used depending on facilities available to you.

We provide animal health planning services and can discuss and plan all aspects of calf rearing and animal health with you.