Quantifying bluetongue vertical transmission in French cattle from surveillance data

Table 1 Proportion of RT-PCR positive results in the study population calculated from June to December 2016

Study area	Total n° cattle	N° cattle only exposed to vectors	RT-PCR + % in all sampled cattle (N° RT-PCR +)	RT-PCR + % in sampled cattle only exposed to vectors (N° RT-PCR +)
NE	2468	1255	12.7% (314)	16.3% (205)
SW	2593	961	11.0% (285)	14.7% (141)
Total	5061	2216	11.8% (599)	15.6% (346)

The proportions of RT-PCR positive cattle were calculated in all sampled cattle and in sampled cattle only exposed to vector-borne transmission (popA and popB), in the whole study area and in the NE and SW areas separately.
NE: North–East; SW: South–West; N°: number of; RT-PCR + %: proportion of positive results by RT-PCR, calculated over the whole period from June to December 2016.

ISSN: 1297-9716