salmonellosis - oregon.gov · salmonellosis salmonellosis is a bacterial illness characterized by...
TRANSCRIPT
81 Selected Reportable Communicable Disease Summary: Oregon 2010
Salmonellosis
Salmonellosis is a bacterial illness characterized by acute abdominal pain, diarrhea, and often fever that usually begins one to five days after infection. Excretion of Salmonella may persist for several days or even months beyond the acute phase of illness. Antibiotics are contraindicated for most patients (the exceptions being those at high risk of invasive infection) and they may increase the duration of excretion.
A wide range of domestic and wild animals are carriers of Salmonella, including poultry, swine, cattle, rodents, iguanas, tortoises, turtles, young poultry, dogs and cats. Most human infections are thought to come from consumption of fecally contaminated food or water, but other environmental exposures may be hard to document and may be underappreciated. Raw or undercooked produce and products of animal origin, such as eggs, milk, meat and poultry, have been implicated as common sources of animal and human salmonellosis. Though not as common as with, say, Echerichia coli O157, person-to-person transmission is well documented. The incidence of infection is highest among young children.
Of approximately 2,500 known serotypes, only about 200 are detected in the United States in any given year. In Oregon, S. Typhimurium and S. Enteritidis are the two most commonly reported serotypes.
In 2010, 518 cases of Salmonella were reported, up from 441 in 2009. A whopping 21 salmonellosis clusters were investigated in 2010. Most of these were very small; only four involved more than five Oregon cases. The largest outbreak (73 cases) involved a Roseburg restaurant, and the most interesting involved a Roseburg dairy (25 cases). After a long and frustrating investigation, a seven-month long trickle of Salmonella Braenderup infections was pinned on an environmental reservoir of Salmonella (viz., the plumbing of an outdoor crate washing machine) that was causing intermittent, low-level contamination of the external surfaces of milk cartons and jugs. This contamination led to about one confirmed illness for every million containers that came from the plant. Other noteworthy outbreak sources in 2010 included African dwarf frogs, baby chicks, Marie Callender frozen entrees, sprouts, Taco Bell, ground turkey, chicken, and sprouts (again). Several outbreaks were never solved.
Selected Reportable Communicable Disease Summary: Oregon 2010 82
Salmonellosis by year: Oregon, 1988–2010
Salmonellosis by onset month: Oregon, 2010
0
100
200
300
400
500
600
19881989
19901991
19921993
19941995
19961997
19981999
20002001
20022003
20042005
20062007
20082009
2010
Year
Case
s
0
20
40
60
80
100
120
Jan Feb March April May June July August Sept Oct Nov Dec
Month
Case
s
2010Median 2005–2009
83 Selected Reportable Communicable Disease Summary: Oregon 2010
Incidence of salmonellosis by age and sex: Oregon, 2010
Incidence of salmonellosis: Oregon vs. nationwide, 1995–2010
0
5
10
15
20
25
30
35
0-4 5-9 10-19 20-29 30-39 40-49 50-59 60-69 70-79 80+
Age group
Case
s/10
0,00
0Male Female
0
5
10
15
20
25
19951996
19971998
19992000
20012002
20032004
20052006
20072008
20092010
Year
Case
s/10
0,00
0
Oregon U.S.
Selected Reportable Communicable Disease Summary: Oregon 2010 84
Incidence of salmonellosis by county of residence: Oregon, 2000–2010
Selected* Salmonella by serotype, Oregon, 2001–2010 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010Braenderup 7 4 1 2 1 11 8 1 21 36
Enteritidis 34 43 78 64 86 74 54 76 61 123
Heidelberg 26 27 12 42 51 19 26 23 44 28
Montevideo 13 17 16 15 15 13 12 15 22 12
Muenchen 8 10 5 7 8 8 9 9 10 10
Newport 16 31 38 14 17 16 17 15 15 24
Oranienburg 10 12 13 6 8 5 8 8 6 8
Saintpaul 4 18 36 16 7 10 3 23 10 13
Typhimurium 86 67 83 86 84 90 52 65 81 40
*Selected because at least one case was reported in 2010 and it is a more common serotype.
Lake
Harney Malheur
Lane
Grant
Klamath
Douglas
Linn
Baker
Crook
Umatilla Wallowa
Curry
WascoUnion
Coos
Jackson
Deschutes
Morrow
WheelerJefferson
Gilliam
MarionPolk
Clackamas
Lincoln
Clatsop
Yamhill
Josephine
Tillamook
Benton
Sherman
Columbia
WashingtonHoodRiverMultnomah
cases per 100,000
0.0 - 2.5
2.6 - 8.5
8.6 - 10 .4
10. 5 - 15.9
16. 0 - 23.6