PMID: 9646715Jul 1, 1998Paper

Is dirofilariasis in dogs spreading in south Switzerland?

Schweizer Archiv für Tierheilkunde
H BucklarPeter Deplazes

Abstract

Microfilarial infections could be detected by the Difil Test in 11 (2.2%) of 479 blood samples of clinically asymptomatic dogs from the South of Switzerland. Dirofilaria repens and D. immitis were identified in 3 (0.6%) and 8 dogs (1.6%), respectively, by the acid phosphatase activity of the microfilariae. 10 dogs with microfilaremia had been abroad or a stay outside Switzerland could not be excluded. One dog diagnosed with D. immitis could have had acquired the infection in the canton Tessin according to information given by the owner. Dogs with microfilaremia are a potential source of infection for mosquitoes. An indigenous cycle of infection in the South of Switzerland is possible since the mean average temperature in summer is above 18 degrees C which is necessary for optimal parasite development in the vector. A strict control of imported dogs or animals exposed to the disease in endemic regions as well as the therapy of infected dogs in the South of Switzerland is advisable.

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