Tag: rhvd

RVHD1 & RVHD2 – An Overview

Updated Dec 2016.

RVHD1 and RVHD2

This article will provide a concise overview of Rabbit Hemorrhagic Viral Disease, its characteristics, locations, testing methods and some of the preventative steps that can be taken.

History

Rabbit Viral Haemorrhagic Disease 1 is a type of Calicivirus, has been in Europe for many decades or even centuries and affects both wild and domestic rabbits. There are a few different pathogenic strains of the virus but until recently, RVHD1 was thought to be the only type in the UK.

RVHD2 differs in a few key ways as it is unaffected by age and has a longer illness phase with different clinical symptoms. It is also thought to have a lower mortality rate. Little research has been done on RVHD2 and it is highly likely that cases are under reported.

Disease Spread

Both viruses are potentially very easily spread and can live in the environment for a long time (RVHD2 up to 200 days in laboratory conditions) Insects, wildlife and scavengers can spread it as well as direct contact with an infected rabbit. Fomites such as bedding, wild plants, shoes and clothing can also carry the virus to new areas. It is currently unknown if biting insects can spread RVHD2.

Due to it being so easily transported, the spread of RVHD can be very quick and strict biosecurity is recommended as well as vaccination.

Vaccination

The current UK vaccine, Nobivac Myxo-RHD offers protection against RVHD1 but is unlikely to offer any for RVHD2 as this virus is antigenically and genetically different from RVHD1. It is recommended that a second vaccination be given to cover RVHD2 and there are a few options:

  • Eravac has been licensed in the UK for use in ‘fattening’ rabbits. This is an oil based drug with no research showing the possible long term effects and there is currently no recommended vaccination schedule.
  • Cunivak RHD is currently out of stock and Cunipravac can be ordered via a special import certificate however it is only available in large multi dose bottles.
  • Filavac RHD K C+V is available to order from most UK wholesalers and is administered annually or 6 monthly (if considered to be a high risk patient or area). It is vital that the rabbits are still vaccinated with the Nobivac Myxo-RHD as the Filavac vaccine does not give any protection against myxomatosis, however standard immunology advice is to leave at least a 2 week gap between the different vaccinations.

It is important to research all options and discuss with your vet / client. The safety and efficacy of using any other vaccine alongside the Nobivac Myxo RHD has not been studied.

It is not recommended to carry out en-mass vaccination clinics as this could potentially increase the risk of disease spread due to the way RVHD is transmitted.

Testing and Reporting

Its important to consider RVHD2 as a differential diagnosis when dealing with a sick rabbit that doesnt seem to respond to treatment and no obvious reason for the illness is found. PCR testing is now available for live rabbits via the Batt Laboratories in Coventry. For sudden deaths, post mortem liver samples can also be sent here or to the Moredun Research Institute.

Wherever possible, please send samples to either laboratory via the methods outlined on their websites. Please also consider reporting all suspicious deaths to the Rabbit Welfare Association and Fund as their Veterinary Advisor is monitoring the spread of this disease.

Biosecurity

Good husbandry is paramount and sick rabbits should be barrier nursed. Enhanced cleaning, disinfection and quarantine protocols can be implemented in practice and with owners. Anigene HLD4V is a veterinary grade product that is believed to be effective against RVHD when used at a concentration of 1:50 for soiled conditions.

It is vital to be aware of the risks associated with attending events such as rabbit shows, petting zoos and even rescues. Environmental insect controls should also be in place as it is still unknown if RVHD2 can be spread via insects. Care should also be taken when considering feeding handpicked wild plants.

Keeping Up To Date

There is a great group on Facebook where people can report suspected and confirmed cases of RVHD1 & RVHD2. This links to a UK map and it also holds a wealth of information and support – I recommend everyone to join.

You can also visit the Rabbit Welfare Association’s website as they will always have the most up to date and factually correct info.

Lastly, Rabbit Specialist Vet Francis Harcourt Brown (retired) has information about the disease on her website.

Be wary of other reports and anecdotal stories doing the rounds as they may not be factually accurate. Also, please contact your own vet asap so they are fully aware of the new RVHD2 strain and that they are stocking and advertising the new vaccine to help fight this. We need owners to insist all their vets order in the vaccine to get as many rabbits as possible protected against this fatal disease.

Please know how to keep your rabbits safe and spread the word!

 

 

 

Disclaimer

Premier Small Animal Show – Good Advice or Promoting Abuse?

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EDIT: 4.2.16 – Burgess have announced they will no longer support the Harrogate Show. Thank you Burgess for making a stand for rabbit welfare.
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Widely promoted as ‘the UK’s biggest small animal show’, the Burgess Premier Small Animal show has been held in Harrogate since 1921. It is a meet up for breeders of rabbits, guinea pigs, rats, chinchillas and more who enjoy showing the best of their stock and hope to come away as winners. As my expertise is in rabbits – this will be the species I focus on here. The Guardian has posted an interesting article on the most recent 2016 show.

 

BUT AT WHAT PRICE?

Rabbit handling at the 2007 Excel show in Harrogate. CC:BY-NC-ND

  Rabbit handling at the 2007 Excel show in Harrogate. CC:BY-NC-ND.

Photos from the event and those from previous events (see above), show some common handling techniques used at shows. For example, rabbits being held on their backs. This is called ‘trancing’ or ‘tonic immobility’. This has been proven to be very stressful for rabbits (as well as increasing the risk of a back injury). As they are prey species, this is an auto response they enter when tipped over. See here for more info on trancing. Many people use this method of handling for checking, grooming and judging rabbits and many refuse to change their ways and disregard the scientific facts. Many top organizations and specialists do not agree with trancing, including The Rabbit Welfare Association and Fund (RWAF) who are the UK’s largest organization dealing with domestic rabbit welfare.

The British Rabbit Council (BRC) are the UK governing body for fur and fancy rabbits. When previously questioned about trancing, they were adamant that this was NOT a part of their routine handling – yet it seems, this happens all too often AND at BRC approved events by BRC approved judges.

Also some of these photos show that the judge is grasping the ears as part of the support / restraint. This method can easily cause damage and pain to the rabbit and is not recommended as a standard form of acceptable and safe handling.

 

BUT SURELY THE ENCLOSURES ARE OK?

Example of show cages. 2007

        Example of show cages in 2007

Sadly not – as you can see they are tiny, one rabbit per cage, wood shavings for bedding, some don’t even have food and / or hay (hay and fresh water should be available to a rabbit 24/7). Thankfully no cages were observed that did not have a water available. Each rabbit can be stuck in these cages for many hours, some will spend the entire day there. Surely this doesn’t meet the Five Freedoms welfare standards? Is this even legal if you consider the Animal Welfare Act 2006?

 

Wire floor show cage

         Wire floor show cage

The photo above (taken by me in 2007) shows the types of cages that the long haired rabbits have to sit in. They have wire bottoms as clearly shown in the picture. Wire floors are not recommended by welfare organizations and rabbit specialists as they can cause pain and damage to the feet. See this RSPCA factsheet for more information on rabbit accommodation.

Next question… where do they stay overnight? That’s another thing I urge you to ask the show organizers. At this particular event a message was shared publicly to the exhibitors explaining that the animals would have to spend the whole of the first evening in their travel boxes as the venue was not safe due to weather problems. Yes the weather is not under anyone’s control, but is it fair to keep an animal in a traveling box overnight? What size are these boxes and where were they placed? When staying at a secure venue with no weather problems, where do the rabbits spend the night – in these show cages? or somewhere else.

Many of the rabbits that do have food in with them, are being fed on a muesli diet – again this has been scientifically proven to contribute to dental and digestive problems. If these people care SO much about their live stock – why are they not adhering to basic welfare guidelines and following the most up to date veterinary advice?

The RWAF state that rabbits should live in bonded, neutered pairs, be fed on a good quality diet (not muesli style mixes) and be housed in spacious accommodation that allows at least 3 full hops in any direction. Clearly – show accommodation is NOT adhering to any of these guidelines. What message is this sending the general public who flock to this event? Charities and veterinary professionals work tirelessly to promote good husbandry, handling and welfare – then for a bit of fun and entertainment (for the humans not the animals), these animal shows can do untold damage to the welfare messages in just a few hours.

WHAT ABOUT DISEASE RISKS?

Some diseases are very easily spread between rabbits and other small animals. I’m focusing on one – Viral Rabbit Hemorrhagic Disease (RVHD). This is a rapid and often fatal disease that is easily spread from rabbit to rabbit and from human to rabbit too. It has also recently mutated into a second strain that is currently not routinely vaccinated against in the UK. The disease can live in the environment for many weeks and is easily spread on shoes, car tyres, clothes, hands etc. The following statement is displayed on the BRC’s own website with regards to RVHD:

“Clothes should be changed between handling rabbits from different places. Newly arrived rabbits should be quarantined for at least a week before mixing with others, and different clothing worn between established and new groups of rabbits.”

So – take a look at the image of the rabbit show cages again… These rabbits are side by side, above and below many other rabbits from other breeders. The judges wear their ‘coats’ for the whole show and do not change them in-between each rabbit. The judging tables have tablecloths on that are not changed between each rabbit. Do the judges wear gloves? Oh and the public have full access in and out the building, can get right up to the show cages and touch them too. Final question: Why are there no apparent disease risk controls in place?

 

WHAT CAN BE DONE?

I advise anyone who agrees that these types of shows DO NOT promote animal welfare, to contact the companies involved. Burgess are the main sponsor and the BRC are heavily involved.

Thankfully I have seen that Burgess have responded to a tweet today and are “reviewing their involvement with the show” (EDIT: and have WITHDRAWN their support for the show. PLEASE contact Burgess to thank them for putting welfare first).

burgess trance replyPlease do consider contacting Burgess, the show and the BRC directly (via email, Facebook, Twitter, letter etc) to see if you can get answers to some of the questions raised and show your displeasure with the event.

Finally a thank you AGAIN to Burgess for putting welfare first.

 

 

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NEW UK Rabbit Vaccine – RVHD2

Background

RVHD and Myxomatosis are diseases found throughout the UK and can be fatal to un-vaccinated rabbits. Both outdoor AND indoor rabbits are at risk. RVHD in particular is highly infectious and contagious.  It is an air borne virus that can be spread by direct and indirect contact with infected rabbits, food bowls, hutches and even the soles of your shoes. For example – if you, your dog or cat has walked on ground where a VHD infected rabbit has been, you can carry it on your clothes or shoes, your other pets can carry it on fur or feet. The virus can survive in the environment for a long time and can survive cold temperatures far better than you might expect.

 

Current Situation

The following info comes direct from the Rabbit Welfare Association and Fund. It was released in a ‘First Alert’ email. This service sends out an email whenever there is an important update in the rabbit world. You can register by emailing [email protected] and you can join the RWAF here.
“As you may know, over the past year there has been an increasing concern regarding RVHD “new variant 2” becoming a cause of deaths in several outbreaks in the UK. Whilst it has been noted in the UK in research papers (Westcott and Choudhury) for at least 2 years, it has clearly become a significant clinical entity in the past few months.
As a result, the RWAF, with valuable assistance from the APLA, Ann Pocknell (Finn Pathologists), Mark Stidworthy and Daniela Denk (IZVG) and Tariq Abou-Zahr (Great Western Referrals) have been putting together a disease risk assessment.
We (RWAF) have now successfully established an SIC (Special Import Certificate) for a suitable EU member state vaccine, Cunivak RHD, and placed an order for a small number of vaccines to establish an ordering system into the UK.
What This Means For Owners.
 Firstly – please note that NO emails from owners about this topic will be passed to Dr Saunders. he will be dealing with Vet emails only due to the high volume of contact.
So for owners – this means you will need to ask your vets to order in the new vaccine which will take a few weeks for them to sort out. The new Cunivak vaccine is NOT a replacement for the current combo vaccine and will need to be given AS WELL AS the Nobivak one. Its important to note that these vaccines CANNOT be given at the same time and need at least a 2 week gap between them.
In total, your rabbit will now require 2 vaccinations (comprising of 3 injections) per year:
1) Nobivak combo – Just one injection covers them for myxomatosis and RHVD1.
2) Cunivak RHVD – 2 injections 3 weeks apart. This covers them against RHVD2.
PLEASE SEE THE MOST UP TO DATE POST RE VACCINE OPTIONS!
You need to leave AT LEAST 2 weeks gap between the different types of vaccines. If you can manage to schedule it so that there is a gap of 4-6 months between vaccines then this would mean your rabbit would have a veterinary health check up approx every 6 months. BUT you don’t HAVE to work to this schedule, just make sure there is at least 2 weeks between vaccines.
Please contact your vets and ask them to start the process of ordering in the new Cunivak RHD vaccine. Most vets will not be aware that they can do this as the information has only just been released. But the quicker you contact them, the quicker they can get up to speed and get the vaccines in stock. If your vets are unsure, please advise them to email [email protected] for more info. As per the RWAF first alert above, this information will be released in veterinary publications in the coming weeks.
Summary.
If your rabbit is vaccinated with the Nobivac combi vaccine AND the Cunivak vaccine, they will have been vaccinated against Myxo, RHVD1 and RHVD2. As always, no vaccination is 100% effective and it does not mean your pet will not contract the disease. However, it does mean they have a chance to be treated and survive these normally fatal illnesses.
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