Toxigenic potential and antimicrobial susceptibility of Bacillus cereus group bacteria isolated from Tunisian foodstuffs

Gdoura-Ben Amor, Maroua; Jan, Sophie; Baron, Florence; Grosset, Noël; Culot, Antoine; Gdoura, Radhouane; Gautier, Michel; Techer, Clarisse

doi:10.1186/s12866-019-1571-y

Table 4 Statistical analyses of associations between the presence or absence of virulence factors and cytotoxicity on Caco-2 cells

From: Toxigenic potential and antimicrobial susceptibility of Bacillus cereus group bacteria isolated from Tunisian foodstuffs

F-test					t-test
Significant association tested Cytotoxicity versus virulence factors	Sum Sq		p-value		Significant association tested Cytotoxicity versus Presence^b/ Absence^a of virulence factors	Estimate		p-value
	Cytotoxicity after		Cytotoxicity after			Cytotoxicity after		Cytotoxicity after
	18 h	5d	18 h	5d		18 h	5d	18 h	5d
hblC:hblD	5562	20,994	0.0032 **	4.57E-08 ***	hblC ^b :hblD ^b	ND	14	ND	4.75E-08 ***
hblC:hblD	5562	20,994	0.0032 **	4.57E-08 ***	hblC ^a :hblD ^b	-10	ND	0.0034 *	ND
hblC:nheB	13,568	10,441	1.58E-07 ***	0.0005 ***	hblC ^b :nheB ^b	27	24	1.58E-07 ***	0.0073 **
hblC:nheB	13,568	10,441	1.58E-07 ***	0.0005 ***	hblC ^a :nheB ^b	ND	−17	ND	0.0058 **
hblC:nheC	6497	11,695	0.0002 ***	4.08E-05 ***	hblC ^b :nheC ^b	12	14	0.0003 ***	4.08E-05 ***
hblD:nheC	3675	11,106	0.0058 **	6.33E-05 ***	hblD ^b :nheC ^b	−8	−14	0.0058 **	6.33E-05 ***
bceT: hblB	23,036	8048	1.12E-10 ***	0.0006 ***	bceT ^b :hblB ^b	18	10	0.0002 ***	0.0006 ***
bceT: hblB	23,036	8048	1.12E-10 ***	0.0006 ***	bceT ^a :hblB ^b	−16	ND	3.07E-07 ***	ND
nheC:bceT:hblB	11,787	6560	6.14E-06 ***	0.0085 **	nheC ^b :bceT ^b :hblB ^b	−17	ND	0.0004 ***	ND
					nheC ^b :bceT ^a :hblB ^b	9	ND	0.004 **	ND
					nheC ^b :bceT ^b :hblB ^a	ND	6	ND	0.012 *
bceT:hblD	11,867	ND	8.99E-07 ***	ND	bceT ^b :hblD ^b	−6	ND	8.99E-07 ***	ND
bceT:nheC	4733	ND	0.0017 **	ND	bceT ^b :nheC ^b	−12	ND	0.0017 **	ND
ces:hblC	9828	ND	7.46E-06 ***	ND	ces ^b :hblC ^b	−17	ND	7.46E-06 ***	ND
cytK:hblD	19,045	ND	6.51E-10 ***	ND	cytK ^b :hblD ^b	14	ND	6.51E-10 ***	ND
cytK:nheC	6617	ND	0.0002 ***	ND	cytK ^b :nheC ^b	−12	ND	0.0002 ***	ND
cytK:nheC:hblB	4501	ND	0.0095 **	ND	cytK ^b :nheC ^a :hblB ^b	12	ND	0.011 *	ND
hblC:cytK	15,874	ND	1.53E-08 ***	ND	hblC ^b :cytK ^b	−12	ND	1.53E-08 ***	ND
hblD:hblA	2417	ND	0.025 *	ND	hblD ^b :hblA ^b	−8	ND	0.025 *	ND
nheB:nheC	6500	ND	0.0012 **	ND	nheB ^a :nheC ^b	27	ND	0.01 *	ND
nheB:nheC	6500	ND	0.0012 **	ND	nheB ^b :nheC ^b	−9	ND	0.018 *	ND
bceT:hblA	ND	8530	ND	0.002 **	bceT ^b :hblA ^b	ND	−7	ND	0.0008 ***
hblC:hblB	ND	5000	ND	0.007 **	hblC ^b :hblB ^b	ND	−11	ND	0.007 **
nheA:hblB	ND	8433	ND	0.002 **	nheA ^a :hblB ^b	ND	−29	ND	0.047 *
nheA:hblB	ND	8433	ND	0.002 **	nheA ^b :hblB ^b	ND	11	ND	0.025 *
cytK:hblA	3400	ND	0.029 *	ND	cytK ^b :hblA ^b	NS	ND	> 0.05	ND
cytK:hblA	3400	ND	0.029 *	ND	cytK ^a :hblA ^b	NS	ND	> 0.05	ND
cytK:nheC:hblA	3165	ND	0.0375 *	ND	cytK ^b :nheC ^b :hblA ^b	NS	ND	> 0.05	ND
cytK:nheC:hblA	3165	ND	0.0375 *	ND	cytK ^a :nheC ^b :hblA ^b	NS	ND	> 0.05	ND

^aabsence; ^bpresence; ND Not determined; NS Not significant (p-value≥0.05); *: significant (p-value: 0.01 to 0.05); **: very significant (p-value: 0.001 to 0.01); ***: very significant (p-value < 0.001)

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