Volume 13, Number 7—July 2007
Research
Virulence Characteristics of Klebsiella and Clinical Manifestations of K. pneumoniae Bloodstream Infections
Victor L. Yu*
, Dennis S. Hansen†, Wen Chien Ko‡, Asia Sagnimeni*, Keith P. Klugman§, Herman Goossens#, Marilyn M. Wagener*, Vicente J. Benedi**1, Meningeal Disease Surveillance in South Africa¶, and the International Klebsiella Study Group
, Dennis S. Hansen†, Wen Chien Ko‡, Asia Sagnimeni*, Keith P. Klugman§, Herman Goossens#, Marilyn M. Wagener*, Vicente J. Benedi**1, Meningeal Disease Surveillance in South Africa¶, and the International Klebsiella Study GroupTable 1
Disease type by virulence factor*
| Source of organism and type of infection | K1 or K2 serotype, % | Mucoid phenotype, % | Aerobactin producer, % | Mouse mortality rate, %† |
|---|---|---|---|---|
| Taiwan | ||||
| Community-acquired | 28 (22/80) | 56 (45/80) | 54 (43/80) | 46 |
| Hospital-acquired | 17 (2/12) | 25 (3/12) | 33 (4/12) | 29 |
| South Africa | ||||
| Community-acquired | 46 (16/35) | 60 (21/35) | 63 (22/35) | 52 |
| Hospital-acquired | 16 (4/25) | 16 (4/25) | 8 (2/25) | 0 |
| Rest of world | ||||
| Community-acquired | 4 (1/26) | 0 (0/26) | 4 (1.26) | 0 |
| Hospital-acquired | 5 (2/36) | 8 (3/36) | 8 (3/36) | 0 |
*Note the virtual absence of putative virulence factors in strains from the rest of the world, other than Taiwan and South Africa. See Results for p values.
†2 mice were tested for each available strain.
