Browsing by Author "Scott I"
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- ItemComparison of the cyathostomin egg reappearance times for ivermectin, moxidectin and abamectin in horses in consecutive egg count reduction tests in winter and summer over two years(New Zealand Veterinary Association, 2021) Scott I; Gee E; Rogers C; Pomroy B; Reilly M; Adlington B; Miller F; Smith A; Legg K; Adams BShortened cyathostomin egg reappearance periods (ERP) serve as a warning of developing anthelmintic resistance (Scott et al., 2015). Efficacy is thought to have declined more rapidly for the later larval stages (L4) than for the egg laying adults, so that animals still show zero or near zero counts for a period after treatment, but with L4 now surviving treatment the ERP has shortened.
- ItemPrevalence of liver fluke on the West Coast(New Zealand Veterinary Association, 2021) Dowling AF; Howe L; Lawrence K; Pomroy W; Scott IA study of all herds (n=430) supplying Westland Milk Co-op were tested with an IDEXX Bulk Milk Elisa (BME) (IDEXX Fasciolosis Verification, IDEXX Europe BV, Hoofdorp, The Netherlands) which characterises herds into intensities of infection (Nil, Low, Medium, Strong). These equate to liver fluke infection prevalence of 0%, <20%, 20 – 50%, >50% within the sampled herd. Overall, the distribution of herds as analysed in the autumn of 2017 was Nil=31%, Low=11%, Medium=14%, Strong=43%. It was notable that some regions had much higher levels of infection than others.
- ItemVentral dermatitis in rowi (Apteryx rowi) due to cutaneous larval migrans.(2015-04) Gartrell BD; Argilla L; Finlayson S; Gedye K; Gonzalez Argandona AK; Graham I; Howe L; Hunter S; Lenting B; Makan T; McInnes K; Michael S; Morgan KJ; Scott I; Sijbranda D; van Zyl N; Ward JMThe rowi is a critically endangered species of kiwi. Young birds on a crèche island showed loss of feathers from the ventral abdomen and a scurfy dermatitis of the abdominal skin and vent margin. Histology of skin biopsies identified cutaneous larval migrans, which was shown by molecular sequencing to be possibly from a species of Trichostrongylus as a cause of ventral dermatitis and occasional ulcerative vent dermatitis. The predisposing factors that led to this disease are suspected to be the novel exposure of the rowi to parasites from seabirds or marine mammals due to the island crèche and the limited management of roost boxes. This is the first instance of cutaneous larval migrans to be recorded in birds. Severe and fatal complications of the investigation resulted in the death of eight birds of aspergillosis and pulmonary complications associated with the use of bark as a substrate in hospital. Another bird died of renal failure during the period of hospitalisation despite oral and intravenous fluid therapy. The initiating cause of the renal failure was not determined. These complications have the potential to undermine the working relationship between wildlife veterinarians and conservation managers. This case highlights that intensive conservation management can result in increased opportunities for novel routes of cross-species pathogen transmission.