A longitudinal study on transmission of Staphylococcus aureus genotype B in Swiss communal dairy herds

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• 作者：Bart H.P. van den Borne^a ; ^{bartvdborne@gmail.com} ; Hans U. Graber^b ; Verena Voelk^c ; Carlotta Sartori^b ; Adrian Steiner^c ; M. Christina Haerdi-Landerer^d ; Michè ; le Bodmer^c
• 关键词：Dairy cattle ; Mastitis ; Intramammary infection ; Staphylococcus aureus ; Transmission parameter ; Reproduction ratio
• 刊名：Preventive Veterinary Medicine
• 出版年：2017
• 出版时间：1 January 2017
• 年：2017
• 卷：136
• 期：Complete
• 页码：65-68
• 全文大小：290 K
• 卷排序：136

文摘

Staphylococcus aureus is a common mastitis causing pathogen of dairy cattle. Several S. aureus genotypes exist, of which genotype B (GTB) is highly prevalent in Swiss dairy herds. Dairy farming in mountainous regions of Switzerland is characterised by the movement of dairy cattle to communal pasture-based operations at higher altitudes. Cows from different herds of origin share pastures and milking equipment for a period of 2 to 3 months during summer. The aim of this longitudinal observational study was to quantify transmission of S. aureus GTB in communal dairy operations. Cows (n = 551) belonging to 7 communal operations were sampled at the beginning and end of the communal period. Transmission parameter β was estimated using a Susceptible-Infectious-Susceptible (SIS) model. The basic reproduction ratio R0 was subsequently derived using previously published information about the duration of infection. Mean transmission parameter β was estimated to be 0.0232 (95% CI: 0.0197–0.0274). R0 was 2.6 (95% CI: 2.2–3.0), indicating that S. aureus GTB is capable of causing major outbreaks in Swiss communal dairy operations. This study emphasized the contagious behaviour of S. aureus GTB. Mastitis management in communal dairy operations should be optimized to reduce S. aureus GTB transmission between cows and back to their herds of origin.