Characterization of antiviral T cell responses during primary and secondary challenge of laboratory cats with feline infectious peritonitis virus (FIPV)

Table 2 Summary of findings for primary FIPV infection

Cat ID	Onset of fever (dpi)	Time of euthanasia (dpi)	FIP form	Antibody titer	Progressor type	Virus load
11–163	2	9	Wet	1:25	Rapid	BLD
11–165	7	11	Wet	1:100	Rapid	BLD
11–224	13	15	Wet	1:100	Rapid	6.1 × 10² PB W1
11–226	13	15	Wet	1:25	Rapid	BLD
11–227	15	24	Wet	1:100	Rapid	4.8 × 10⁴ P W2
11–150	28	29	Wet	1:400	Rapid	BLD
11–162	28	29	Wet	1:400	Rapid	8.7 × 10⁴ P W2
11–230	28	30	Wet	< 1:25	Rapid	4.1 × 10⁴ P TB
11–152	25	42	Wet-dry	1:400	Slow	4.3 × 10² PB W2 3.5 × 10² PB W3
11–228	40	45	Dry	1:100	Slow	BLD
11–229	39	45	Wet-dry	1:400	Slow	BLD
11–231	46	48	Wet	1:100	Slow	BLD
11–164	35	49	Wet	1:1600	Slow	1.5 × 10⁶ P W2 6.1 × 10³ PB W2
11–151	39	50	Wet	1:400	Slow	BLD
11–148	28	106	Dry	1:6400	Slow	2.5 × 10⁴ PB W2 3.9 × 10² PB W3
11–147	NA	NA	NA	1:100	FIP resistant	3.1 × 10⁴ P W2
11–149	NA	NA	NA	1:100	FIP resistant	3.2 × 10⁵ P W2 1.8 × 10² PB W2
11–166	NA	NA	NA	1:100	FIP resistant	BLD
11–225	NA	NA	NA	1:400	FIP resistant	BLD

The abbreviation dpi represents days post inoculation. Antibody titers represent the time point of euthanasia or 4 weeks post inoculation for survivor cats. Virus load represents measurements in PBMC and plasma only. BLD denotes below the limits of detection. PB represent PBMC and the associated value shown represents FIPV RNA copies per 10⁶ cells. P denotes plasma and the associated value represents FIPV RNA copies per ml. W with associated number value stands for week PI and TB stands for terminal bleed. Virus load detection results in LNMC are reported in the text

ISSN: 1746-6148