AHS TRUST OUTBREAK REPORT – 03 April 2013

AHS TRUST OUTBREAK REPORT – 03 April 2013

 

During the last 30 days, we have received 58 reports of suspected cases of AHS from most parts of the country normally affected by AHS during outbreaks. The mortality rate thus far is 61%. To be specific about cases captured to date, it seems like the mortality on un-vaccinated cases is around 85%  and on vaccinated cases is 24%.

 

Every year we compile outbreak reports and we estimate that we only report on less than 30% of all cases and I do not believe this figure has changed at all. The graphs will indicate that a specific pattern is standard every year and reports of cases usually come in up to 4 weeks after the actual outbreak. This will indicate that apart from the Eastern Cape outbreak, March will record the highest number of cases in line with previous years.

 

The specific breakdown of cases reported by Province can be found on the table at the end of this report. 

 

The most part of the early outbreak numbers are from the Eastern Cape outbreak which recorded 93 cases up to the end of March 2013 ( only 6 cases were reported for March and these were all further North in the Transkei.)

 

Precautions to limit outbreaks

 

Owners are encouraged to vaccinate their animals annually to limit the impact of the disease. All horses in RSA (except in the AHS free and surveillance zones in the Western Cape Province) must be vaccinated annually using a registered vaccine at the cost of the owner. The African Horse Sickness Vaccine from Onderstepoort Biological Products (Reg No, G116, Act 36 of 1947) is currently the only registered vaccine. It is important administer the vaccine before the start of AHS outbreaks.

It is advisable to stable horses at least two hours before sunset and keep them stabled for at least two hours after sunrise. This is the time period when the Culicoides midges are most active and known to be feeding. As Culicoides midges also colonize around stagnant water sources, all efforts should be made to prevent such pooling of water and to move animals away from these sources.

To prevent the introduction of the AHS virus into the AHS free zone which is part of the AHS controlled area of the WCP; all movements of horses to the AHS controlled areas area are subject to State Veterinary movement control (permit). The local State Veterinarian will advise on the AHS status of the relevant areas.

 

Research initiatives are reliant on field samples and horse owners are encouraged to send in as many samples as possible. Please contact Douglas Welsh on 082 9654082 in this regard.

 

Douglas Welsh (Chairman)

www.africanhorsesickness.co.za

 

Monday, 03 April 2013

 

Statistics of All Reported Cases for 2012/2013 Outbreak*

Early Warning Map | Statistics

Overall Outbreak Statistics

Outbreak duration (months):

5

Total approved cases:

208

Number of horses that died:

126

Number of horses that survived:

82

Reported Cases by Province

Cases in Gauteng:

21

Cases in Mpumalanga:

6

Cases in North-West Province

1

Cases in Free State:

4

Cases in Limpopo:

11

Cases in KwaZulu Natal:

66

Cases in Northern Cape:

0

Cases in Eastern Cape:

97

Cases in Western Cape:

0

Cases in Namibia:

2

Cases in Lesotho:

0

Cases in other countries:

0

Reported Cases by Month

November 2012:

1

December 2012:

45

January 2013:

93

February 2013:

29

March 2013:

40

Information Last Updated on 03/04/2013

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