Laboratory evidence on the vector competence of European field-captured Culex theileri for circulating West Nile virus lineages 1 and 2

Table 1 Infection, dissemination, and transmission rates, as well as transmission efficiency in Cx. theileri after oral exposure to WNV lineages 1 and 2

Lineage	IR (%)	DIR (%)	TR (%)	TE (%)
Lineage	MIB	MEB	SGB	TE (%)
WNV-1	30/30 (100)	21/30 (70)	15/21 (71.43)	15/30 (50)
WNV-1	Null	+	+	15/30 (50)
WNV-2	26/41 (63.41)	15/26 (57.69)	12/15 (80)	12/41 (29.27)
WNV-2	+	++	+	12/41 (29.27)

Number positive for WNV/number tested (prevalence), and relative rating of the importance of the barrier
Rating of the relative importance of the barrier: null, virus crosses this barrier in > 80% of females; +, minor, virus crosses this barrier in 60–80% of females; ++, moderate, virus crosses this barrier in 40–60% of females [81]
IR, infection rate; DIR, disseminated infection rate; TR, transmission rate; TE, transmission efficiency; MIB, midgut infection barrier; MEB, midgut escape barrier; SGB, salivary gland barriers

ISSN: 1756-3305