Table 3.

Lethality analysis of C. elegans infected by Corynebacterium diphtheriae isolates

Group	Strain	Toxigenicity	Pilus type(s) present	LT50 (days)a
1	C65	−	Spa−	5.65
	CD310	−	Spa−	5.71
2	C52	−	SpaA	5.44
	760	−	SpaA	5.48
3	PR26	−	SpaA, SpaH	7.02
	CD364	−	SpaA SpaH	8.01
4	496	+	Spa−	5.70
	724	+	Spa−	6.03
5	G4212	+	SpaA	8.88
	711	+	SpaA	9.06
6	722	+	SpaA, SpaH	5.46
	E8277	+	SpaA, SpaD	7.95
7	1737	+	SpaA, SpaD, SpaH	3.71
	749	+	SpaA, SpaD, SpaH	2.88
Sequence strain	13129b	+	SpaA, SpaD, SpaH	3.18

^aTime (days) required for killing 50% of the nematodes. The results are averages of two independent experiments.

^bSequence strain NTCT13129.