Table 4.

Source and location of E. coli O157:H7 during two outbreaks on farm R

Sample sourceSampling location and resultsa
11/8/95b11/14/9511/16/9511/20/9511/24/9511/29/9512/4/9512/13/9512/20/951/3/961/10/961/16/961/22/961/30/962/6/962/13/962/20/962/27/963/5/96 through 7/1/96c7/8/967/15/967/23/967/30/968/5/96
FeedSHSHSHSHBBBPIPIIPII
WaterSHSH SH-3,1 SH-3 SH SH-3 SHSHSHSHSHSHSHSHSH
BBBBBBBB B-3 B-3
PI/II-7 PI/IIPI/IIPI/IIPI/II
Cohort animal (DOBd)
 Red 116 (12/31/95)HHHHHHHHSHPIPIPIPIPI
 Red 115 (12/23/95)HHHHHSHSHSHSHPIPIPIPIPII
 Red 114 (12/24/95)HHHHHSHSHSHSH PI-7,8 PIPIPIPII
 Red 113 (11/23/95)HHHHHHSHSHSHSHSHBBBPI PII-7 PIIPII PII-7
 Red 112 (11/16/95)HHHHHHHSHSHSHSHSHBBB PI-7 PIPIPIPII
 Red 111 (10/29/95)HHHHHSH SH-3 SH-3,5 BBBBBBBBPIPIPI PI-7 PII
 Red 110 (10/06/95)HHHHSHSH SH-3 SH-3 BBBBBBBBPIPII PII-7 PIIPII
 Red 109 (10/06/95)HHHHSHSH SH-3 SHBBBBBBBBPIPIIPIIPIIPII
 Red 108 (10/04/95)HHSHSHSH SH-3 SH-3 B-3,5 BBBBBBBBPIIPIIPIIPIIPII
 Red 107 (10/04/95)HHSHSHSHSHSHB B-3,5 B B-3 B-3,6 B-3 B B-3 B-3 PII-7 PIIPIIPIIPII
 Red 106 (9/30/95)HHSHSHSH SH-3 SHBBBBBBPIPIB PII-7 PIIPII PII-7 PII
 Red 105 (9/29/95)HSHSHSH SH-3 SHSH B-3 BB B-3 B-3 BBBBPIIPIIPIIPIIPII
 Red 104 (9/24/95)HSHSH SH-1 SHSHSHBBBBBBPIBB PII-7 PIIPIIPIIPII
 Red 103 (9/16/95)SHSHSHSHBB B-3 BBBB B-3 B B-3 BBPIIPIIPIIPIIPII
 Red 102 (9/15/95)SHSH SH-1 SH-1 SHSHSHSHBBBBBBPIPIPIPIIPII PII-7 PII-7 PII
 Red 101 (9/14/95) SH-1 SHSHSHSH SH-4 B-4 BB B-3 BBBPIPIPI PII-7 PIIPIIPIIPII
  • a H, individual calf hutch; SH, superhutch containing weaned heifers; B, calf barn; PI, pen I; PII, pen II; PI/II, water tank shared by animals in pens I and II. Data in boldface type indicate that this sample tested positive for E. coli O157:H7. The number(s) following the sampling location designation refers to the REDP of the isolate.

  • b Sampling date (month/day/year).

  • c All samples collected during this period were negative.

  • d Date of birth (month/day/year).