Some remarks about spreading of Dermanyssus gallinae in Italy Vito - PowerPoint PPT Presentation

Some remarks about spreading of Dermanyssus gallinae in Italy Vito Mastrangelo London, November 2013 Survey datas have been kindly provided by Prof. Antonio Camarda* and Maria Assunta Cafiero ** *Department of Veterinary Medicine University of Bari (Italy) **Istituto Zooprofilattico Sperimentale della Puglia e Basilicata (Italy)

• 26 1.000 - 5.000 • 13 20.100 - 50.000 • 14 • 5 5.100 - 20.000 50.100 - 160.000

Results Infested farms 74% Negative farms 26% 43 FARMS OF 58 RESULTED INFESTED BY DERMANYSSUS GALLINAE

51,7% OF THE FARMERS DECLARED THE PRESENCE OF THE MITES IN THEIR FARM 60 50 40 30 20 10 0 48,3% OF THE FARMERS DECLARED AN HIGHER INFECTION DURING SUMMER

Symptoms which the farmers associate with the infestation by Dermanyssus gallinae

74,1% OF THE FARMERS USE ACARICIDES 80 60 40 20 0

48,8% OF THE FARMERS DECLARE TO TREAT IN SUMMER TIME ONLY 50 40 30 20 Seasonality of the treatment Frequency of the treatment 10 0 ONLY 2 FARMERS TREAT WHEN THE FARM IS EMPTY

Poultry activity and business are also concerned by the following Dermanyssus gallinae correlated aspects: - Decrease of eggs production (table eggs and hatching eggs) - Mortality of embryos (Layer and Broiler chicks production) - Poor egg quality (shell aspect and strenght) - Overall mortality increase - Negative effects on health of: - Rearing Pullets - Breeders, laying hens and broilers - Farm workers

Due to the entity of the Italian global layers’ capital (over 42Ml. birds) and the domestic large average farms’ size, our farmers and the national association (Assoavi) are deeply concerned about red mite impact on the whole egg chain at technical and economical level. So, further investigations, studies and innovative products are welcome. Growing concerns linked to the use of conventional chemical treatments, are increasing interest in alternative methods to control DG in poultry farms. Among them, feed integration with vegetable extracts and /or minerals as: - extracts of Withania somnifera and Ocimum sanctum ; - extracts of Mangifera indica, Mucuna pruriens and Boerhavia diffusa ; - extract of Allium sativum ; - organic silica.

Thanks for your kind attention! Vito Mastrangelo Assoavi