TABLE 1.

Phenotypic distribution of ETEC toxins and E. coli surface antigens from September 2000 to August 2003

CF type identifiedNo. (%) of ETEC isolates associated with the following toxin type:
LT (n = 134)LTST (n = 39)ST (n = 125)Mixed (n = 22)All ETEC (n = 320)
CFA/I2 (5.1)44 (35.2)4 (18.2)50 (15.6)
CS11 (0.7)1 (0.3)
CS1 + CS31 (0.8)1 (4.5)2 (0.6)
CS2 + CS31 (0.8)1 (4.5)2 (0.6)
CS31 (4.5)1 (0.3)
CS4 + CS64 (18.2)4 (1.3)
CS51 (0.7)1 (2.6)3 (2.4)5 (1.6)
CS5 + CS615 (38.5)4 (3.2)2 (9.1)21 (6.6)
CS61 (0.7)21 (16.8)22 (6.9)
CS77 (5.2)1 (4.5)8 (2.5)
CS82 (1.5)2 (0.6)
CS121 (0.7)1 (2.6)1 (0.8)3 (0.9)
CS148 (20.5)10 (8.0)2 (9.1)20 (6.3)
CS174 (3.0)4 (1.3)
Mixed CFa3 (7.7)3 (2.4)6 (1.9)
CF undetectedb117 (87.3)9 (23.1)37 (29.6)6 (27.3)169 (52.8)
  • a Children with mixed ETEC infections shed two different ETEC isolates, each of which expressed one CF antigen; these were LTST CS3 and CS5 plus CS6, LTST CFA/I and CS5 plus CS6, LTST CFA/I and CS7, ST CS2 plus CS3 and CS6, ST CS6 and CS17, and ST CS3 and CS6.

  • b CF was undetected with a panel of 12 monoclonal antibodies to CFA/I, CS1 to CS8, CS12, CS14, and CS17.