The results indicate that single and/or multiple drug resistance in equine cyathostomins is present in the three countries, is widespread particularly for FBZ and/or PYR and in one UK yard multiple resistance present was detected to FBZ, PYR and IVM. Macrocylic lactones proved to be the most effective drugs, with some evidence of resistance to IVM and highest activity of MOX, despite a single case of reduced efficacy in Germany. These data call for the development and implementation, among practitioners, owners and managers, of further plans to reduce the expansion of the anthelmintic resistant populations and to use those anthelmintics that remain effective in a manner that preserves their efficacy as long as possible.
The prevalence of gastrointestinal parasites was investigated in mammals housed in two of the main Italian zoological gardens: the Zoo Safari of Fasano (province of Bindisi, Apulia, Italy) and the Giardino Zoologico of Pistoia (Tuscany, Italy). In November 2007, fecal samples were collected at the Zoo Safari of Fasano (n = 96) and at the Giardino Zoologico of Pistoia (n = 60), from primates, carnivores, perissodactyls, artiodactyls and proboscideans. In most of the cases, the same animal species or genera were considered in both the zoos. One or more intestinal parasites were detected in 61.5% of the examined samples. However, very different percentages of protozoa- and helminth-positive samples were obtained in the animals from the two zoos, with an overall gastrointestinal parasitic infection of 77.1% in the Zoo Safari of Fasano and 36.7% in the Giardino Zoologico of Pistoia. Overall, 10% (Cryptosporidium sp.) and 43.3% (Toxocara cati, Strongyloides stercoralis, Toxascaris leonina, and hookworms) of carnivores, 66.7% (Cryptosporidium spp.) and 100% (Trichuris spp. and Strongyloides fülleborni) of primates, 25.0% (Eimeria spp., Cryptosporidium spp.), and 57.1% (Trichuris sp., Toxocara [Neoascaris] vitulorum, gastrointestinal strongyles, and Paramphistomidae) of artiodactyls were infected with protozoa and helminthes parasites, respectively. Only gastrointestinal strongyles were diagnosed in 16.7% of proboscideans and in 50.0% of perissodactyls examined. The results of this study suggest that zoonotic protozoans and gastrointestinal helminths are common in zoo mammals and that these animals may serve as a potential reservoir and transmit these parasites to humans. The different animal management in the two zoos indicates that the regular monitoring of parasitic diseases and the use of selective treatments can represent effective measures for the control of several gastrointestinal infections in zoological gardens.
The occurrence of common respiratory parasites of domestic cats (the metastrongyloid "cat lungworm" Aelurostrongylus abstrusus and the trichuroid Capillaria aerophila) and of neglected respiratory nematodes of felids (Troglostrongylus brevior, Angiostrongylus chabaudi and Oslerus rostratus) was here evaluated in two and three geographical sites of Northern and Central Italy, respectively. In 2014-2015, individual fecal samples of 868 domestic cats were examined microscopically and genetically, and epidemiological data related to parasitic infections were evaluated as possible risk factors by binary logistic regression models. The most common parasite was A. abstrusus in both mono- and poli-specific infections, followed by T. brevior and C. aerophila, while cats scored negative for other parasites. Cats positive for A. abstrusus (1.9-17 % infection rate) and C. aerophila (0.9-4.8 % infection rate) were found in all examined sites, while cats scored positive for T. brevior (1-14.3 % infection rate) in four sites. Also, T. brevior was here found for the first time in a domestic cat from a mountainous area of Northern Italy. The occurrence of lungworms was statistically related to the presence of respiratory signs and more significant in cats with mixed infection by other lungworms and/or intestinal parasites. Cats living in site C of Central Italy resulted statistically more at risk of infection for lungworms than cats living in the other study sites, while animals ageing less than 1 year were at more risk for troglostrongylosis. Finally, the presence of lungworms was more significant in cats with mixed infection by other lungworms and/or intestinal parasites. These results are discussed under epidemiological and clinical points of views.
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