Table 3.

Virus demonstration in FIPV-exposed cats without FIP (Group I, a: cat No. 1–7, b: cat No. 8 and 9)

Cat No.	EMa	RT-PCRb	Cultivationc
1	−d	+d	+
2	(+/−)d	+	+
3	–	+	+
4	–	+	+
5	–	–	+
6	+	+	+
7	+++	+	+
8	++	+	n.d.e
9	+	+	n.d.e

^aEM, electron microscopical demonstration of coronavirus particles in ingesta.

^bRT-PCR, nested FCoV RT-PCR on faeces (Herrewegh et al., 1995).

^cCultivation, cultivation of buffy coat monocytes on whole feline embryo cells (Gunn-Moore et al., 1998).

^d–: negative result (no viral particles); +/−: single viral particles; +: few viral particles; ++: numerous viral particles; +++: abundant viral particles.

^en.d.: not done.