Twenty Years of Listeria in Brazil: Occurrence of Listeria Species and Listeria monocytogenes Serovars in Food Samples in Brazil between 1990 and 2012

Table 3

Species and serovar frequency of Listeria spp. isolates from food, in Brazil. Period 1990–2012.

Food type	L. innocua			L. monocytogenes												L. welshimeri	L. seeligeri	L. grayi	Total
	6a	6b	NT	1/2a	1/2b	1/2c	3a	3b	3c	4b	4c	4e	7	NT	R					%
Meat:
Nonprocessed	1939	90	233	244	250	140	6	20	2	275		28	1	2	4	51	25		3310	57.37
Processed	615	53	27	239	113	144	5	8		163	2	4		18		8	5		1404	24.33
Ready-to-eat	387	38	45	139	90	80		1		195		13	1	4			2	2	997	17.28
Unknown	2			11	13	14				19									59	1.02
Total
	2943	181	305	633	466	378	11	29	2	652	2	45	2	24	4	59	32	2	5770	100
%	51.0	3.14	5.29	10.97	8.08	6.55	0.19	0.51	0.04	11.29	0.04	0.78	0.04	0.41	0.06	1.02	0.55	0.04

NT = nontypable (smooth form).
R = rough form.