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J Infect Dis. 2008 Jul 1;198(1):109-14. doi: 10.1086/588823.

Salmonellosis outcomes differ substantially by serotype.

Author information

1
Communicable and Environmental Disease Services, Tennessee Department of Health, 1st Floor, Cordell Hull Bldg., 425 5th Ave. N., Nashville, TN 37243, USA. tim.f.jones@state.tn.us

Abstract

BACKGROUND:

Most human infections are caused by closely related serotypes within 1 species of Salmonella. Few data are available on differences in severity of disease among common serotypes.

METHODS:

We examined data from all cases of Salmonella infection in FoodNet states during 1996-2006. Data included serotype, specimen source, hospitalization, and outcome.

RESULTS:

Among 46,639 cases, 687 serotypes were identified. Overall, 41,624 isolates (89%) were from stool specimens, 2524 (5%) were from blood, and 1669 (4%) were from urine; 10,393 (22%) cases required hospitalization, and death occurred in 219 (0.5%). The case fatality rate for S. Newport (0.3%) was significantly lower than for Typhimurium (0.6%); Dublin (3.0%) was higher. With respect to invasive disease, 13 serotypes had a significantly higher proportion than Typhimurium (6%), including Enteritidis (7%), Heidelberg (13%), Choleraesuis (57%), and Dublin (64%); 13 serotypes were significantly less likely to be invasive. Twelve serotypes, including Enteritidis (21%) and Javiana (21%), were less likely to cause hospitalization than Typhimurium (24%); Choleraesuis (60%) was significantly more so.

CONCLUSIONS:

Salmonella serotypes are closely related genetically yet differ significantly in their pathogenic potentials. Understanding the mechanisms responsible for this may be key to a more general understanding of the invasiveness of intestinal bacterial infections.

PMID:
18462137
DOI:
10.1086/588823
[Indexed for MEDLINE]
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