Table 2. Mean organ lesion scores in chickens infected with APEC MT78 and UEL17.

	Mean lesion scores
Straina	Air sacsb	Lungsb	Heartb	Liverb	Spleenb	All organsb
MT78	2.025±0.427	2.5±0.884	1.05±1.168	0±0	1±0	6.575±2.157
UEL17	0.975±0.503	3.25±1.027	0±0	0±0	1±0	5.225±1.393

^a n = 5 chickens per strain at 24 h p.i.

^bOrgan lesions were scored as described [2]: air sacs 0–3; lungs 0–5; heart 0–3; liver 0–2 and spleen 0–1; maximum additive lesion score: 14.