Table 1B.

Non-O157 STEC isolates characterized at the National Escherichia coli Reference Laboratory, by serogroups.

Serogroup			Number of isolates reported, 1995-2020			Percentage of total isolates serogroup
14			7			0.2%
22			7			0.2%
88			7			0.2%
91			60			1.5%
76			52			1.3%
165			45			1.1%
228			28			0.7%
174			27			0.7%
123			23			0.6%
177			22			0.6%
153			21			0.5%
28			20			0.5%
178			10			0.3%
63			9			0.2%
7			8			0.2%
2			7			0.2%
26			918			23.2%
103			806			20.4%
111			643			16.3%
45			290			7.3%
121			248			6.3%
145			179			4.5%
69			71			1.8%
118			71			1.8%
117			6			0.2%
175			6			0.2%
84			19			0.5%
128			19			0.5%
146			18			0.5%
113			17			0.4%
119			15			0.4%
8			14			0.4%
55			14			0.4%
172			12			0.3%
130			10			0.3%
156			10			0.3%
126			7			0.2%
9			6			0.2%
110			6			0.2%
112			6			0.2%
179			6			0.2%
6			5			0.1%
43			5			0.1%
71			5			0.1%
141			5			0.1%
181			5			0.1%
1			4			0.1%
33			4			0.1%
50			4			0.1%
80			4			0.1%
98			4			0.1%
116			4			0.1%
132			4			0.1%
166			4			0.1%
51			3			0.1%
60			3			0.1%
73			3			0.1%
79			3			0.1%
82			3			0.1%
86			3			0.1%
109			3			0.1%
125			3			0.1%
162			3			0.1%
163			3			0.1%
168			3			0.1%
5			2			0.1%
11			2			0.1%
18			2			0.1%
20			2			0.1%
21			2			0.1%
25			2			0.1%
38			2			0.1%
42			2			0.1%
49			2			0.1%
53			1			0.0%
61			1			0.0%
70			1			0.0%
87			1			0.0%
96			1			0.0%
101			1			0.0%
105			1			0.0%
115			1			0.0%
131			1			0.0%
74			2			0.1%
75			2			0.1%
77			2			0.1%
85			2			0.1%
100			2			0.1%
104			2			0.1%
124			2			0.1%
136			2			0.1%
137			2			0.1%
143			2			0.1%
149			2			0.1%
158			2			0.1%
160			2			0.1%
3			1			0.0%
4			1			0.0%
12			1			0.0%
19			1			0.0%
24			1			0.0%
27			1			0.0%
52			1			0.0%
134			1			0.0%
135			1			0.0%
140			1			0.0%
150			1			0.0%
151			1			0.0%
152			1			0.0%
154			1			0.0%
180			1			0.0%

*Data represented from CDC Bacterial Foodborne and Diarrheal Disease National Case Surveillance Annual Reports, 2003-2020.