There have been forty six confirmed cases of Alabama Rot in dogs in England between December 2012 to December 2014 (a further one case was in Northern Ireland) (1).
Twenty five cases – 54% of all confirmed cases – are in three ‘cluster’ regions: New Forest (Hampshire) – sixteen cases (34%), Leigh (Greater Manchester) – five cases (11%) and Guildford (Surrey) – four cases (9%). Are these ‘clusters’ real or apparent?
A further twenty one cases (46%) were reported in the rest of England.
Could these clusters occur by chance? Or is their a trigger in the environment in these areas that makes dogs more prone to get CRGV disease? Or were vets in these areas more aware of CRGV symptoms and hence reported the cases more than the rest of UK vets?
See the All CRGV cases map from AlabamaRot.co.uk (at 18th April 2015) (1). The three ‘clusters’ (figures 1 and 2) are compared to incidence in the rest of the UK (figure 3).
In a reply to a letter by Ralph Smith, who was intrigued by the number of dogs visiting the New Forest (4), Holm and others said that 10 (33%) of the 30 cases were in the New Forest (2).
Ten dogs had been in the New Forest National Park shortly (four hours to 14 days) before developing skin lesions and/or becoming unwell. (3)
“Ten of the 30 dogs reported with CRGV had been walked in the New Forest over the two weeks before developing skin lesions and/or developing other clinical signs. It is difficult to know at this stage whether this truly represents an increased disease incidence in the New Forest or an increased awareness of disease in that location. At the time of data collection there was little information available nationally to veterinary surgeons on this disease but local…” (2)
Four (13%) cases were in Guildford, Surrey and the balance 16 (54%) cases in the rest of the UK (3) (Figure 4).
(1) Street, C.G., UK map of Alabama Rot (CRGV) cases (November 2012 to todays date). Available online: https://www.google.com/maps/d/edit?mid=zIJgTtl9x6zk.kif7awTR9hAA
(2) Walker, D.J., Holm, L., Newton, R. and O’Conner, C. (2015) ‘CRGV in dogs visiting the New Forest’, Veterinary Record, vol. 176, no. 15, pp. 392-392. Extract available online.
(3) Holm, L.P., Hawkins, I., Robin, C., Newton, R.J., Jepson, R., Stanzani, G., McMahon, L.A., Pesavento, P., Carr, T., Cogan, T., Couto, C.G., Cianciolo, R. and Walker, D.J. (2015) ‘Cutaneous and renal glomerular vasculopathy as a cause of acute kidney injury in dogs in the UK’, Veterinary Record, vol. accepted January 21st 2015, no. available free online 23rd March 2015, pp. 1-12.
(4) Smith, R. (2015) ‘CRGV in dogs visiting the New Forest’, Veterinary Record, vol. 176, no. 15, pp. 391-391. Extract available online.