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Table 2 Differences between primary and re-emerged clusters of STM

From: Improving resolution of public health surveillance for human Salmonella entericaserovar Typhimurium infection: 3 years of prospective multiple-locus variable-number tandem-repeat analysis (MLVA)

 

Primary1 clusters (n = 15)

Re-occurred2 clusters (n = 24)

Statistical significance

 

Mean

CI (95%)

Mean

CI (95%)

 

Cluster size (number of cases)

22.66

12.78

66.46

42.18

P = 0.005

Duration (weeks)

7.21

3.98

12.04

0.27

P = 0.07

Temporal density

1.4

3.95

1.47

0.27

NS

Spatial density

1.95

0.49

2.75

0.18

P < 0.001

  1. Notes: 1 A primary cluster is the first due to a new MLVA type
  2. 2 A re-occurred cluster is a second or subsequent cluster due to the same MLVA type as the corresponding primary cluster
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BMC Infectious Diseases

ISSN: 1471-2334

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