shigella in northern kentucky - ky chfsshigella sonnei •gram negative non-spore forming rod...
TRANSCRIPT
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Shigella in Northern Kentucky
Joyce Rice, RN, MSPH, Epidemiology
Manager
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Shigella sonnei
• Gram negative non-spore forming rod
• Human is the only reservoir
• Transmitted via fecal-oral route
• Highly infectious, it has a very low infective dose, in some cases as few as 10 cells.
• Produces Shiga toxins similar to those produced by some strains of E.coli
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Shigellosis
• Identification and Epidemiology
• Incubation Period: Incubation period is usually 1-3 days but can be as short as 12 hours and as long as 4 days
• Communicability: • Acute symptomatic carriers • Asymptomatic carriers • From food contaminated by an ill food handler • From contaminated drinking or recreational water
• Susceptibility: Everyone is susceptible, but elderly people, children and those with poor health and nutritional status are at higher risk for severe illness.
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It Was a Long
Summer
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Shigella Cases in Northern Kentucky Distributed by year
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Shigella Outbreak 2007
A brief review
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Date of onset
Northern Kentucky 2007 Shigella Epi Curve
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2007 Shigella outbreak
Distribution by Age
• Age range 3 months to 58
years, median of 5 and a
mode of two
• 79% under 21 years of
age
• 54% Female
• 36% were associated with
swimming pools
• 61% related to childcare
• Attendee or contact of
attendee
Distribution by Age
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Age range
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Fast Forward…..2011
It’s Baaaack……
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Fast Forward….2011
• Index Case: April 3, 2011 date of onset
• 2 other family members became ill
• April 6, 2011, 1 year old became ill, (no
connection found to the first case) attends
a Child Care facility.
Just the beginning….
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Normal Shigella Levels:
0-3 Cases per 2nd Quarter
We began to see several cases
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• Three cases in a short time period…
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• First Child Care Center (CCC)….
• Second CCC…7 cases
• Third CCC…7 cases
• Rest CCC’s ranged 1-9 cases
• Ave 3 cases per CCC
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Case Definition:
• Confirmed Case: A Northern KY resident
experiencing diarrhea on or after April 3,
2011 and has a stool culture positive for
Shigella
• Probable Case: A Northern KY resident
experiencing diarrhea on or after April 3,
2011 and is an epidemiological link to a
lab confirmed case of shigellosis.
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Linking Cases:
No KY is a small place!!
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Schools
Shigella cases in Childcare Centers and Schools
Associated with
King's Kids
Associated
with
Child Connections Associated with
Newport Head Start
Associated with
Little Red School House
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Shigella Cases In Northern Kentucky Distributed by County of Residence
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Shigella Cases In Northern Kentucky Distributed by Age Range
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Teamwork
• Epidemiologist
• Environmentalist
• Child Care Coordinator
• “Poo Crew” Weekly Review Meetings
• All of the above plus HD Director, PIO,
State Epi’s (by phone)
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Interventions
• Alerts to Healthcare Providers
• Weekly update via blast fax and email
• Letters to Childcare facilities
• Via email
• Letters to school nurses and/or Principals
• Via email
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Interventions
• Hand washing, diapering
procedures reviewed with
Staff
• In childcare centers letters
were sent home to parents
• H2O tables Filled with Sand
• Walk Through CCC’s
• Initially those with cases…
• Environmental Health
Inspected CCC Kitchens
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More Interventions…..
• Fact Sheets & Hand washing brochures
• Libraries
• Park and Recreation Offices
• Extension Centers
• Churches for VBS
• Media:
• TV, Radio, Newspapers
• Twitter Account to update followers
• Health Dept website updated Weekly
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Interventions for Childcare Centers
• Recommended Sending Children & Staff
home after 1 episode of diarrhea
• Require a Neg stool test on children/staff
with diarrhea before they return
• Any Pos. stool test requires:
• Asymptomatic
• 2 neg. Stool tests
• 24 hrs apart
• 48 hrs after antibiotics completed or
symptoms resolved
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Child Care Centers
with cases posted
signs on their doors.
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Child Care Coordinator
• Put together a folder for each facility:
• Review Diapering
• Review Handwashing
• Cleaning and Sanitizing Solutions
• Soap Solution or Bleach
• ¼ cup/gal H2O
• 1 tablespoon/quart H2O
• Daily Health Check
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* How many were ill,
* Staff and Children
* Who was healthy
* Answer questions, concerns
* Work Together!
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Onset of Summer
Concern: Diapered children
in pools (Remember 2007)
Decision: Close the Pools to
Diapered Children!!
Team Decision: HD Director,
Director Environmental &
Epidemiology Manager
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We Were Not Popular!
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Pool Restrictions
Lifted July 1, 2011
• June data
indicated no spike
in cases
• Although Cases
Continued, few had
reported being in a
pool while
infectious
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August Concerns…
• Increase seen in the past
• Spoke to School Nurses at
Annual Immunization Conference
• Letter from District Director sent
to Superintendents
• Environmental Staff hand out info.
Sheets during School Cafeteria
inspections
• Attend School Readifests
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Wash your hands before you prepare or
eat food, treat a cut or wound, care for
someone who is sick.
Wash your hands after you use the
restroom, change a diaper, or care for
someone who is sick.
Rub hands together for at least 20 seconds.
Use soap. Wash between fingers, under
fingernails, and on the backs of your hands.
Use a towel to dry hands and turn off the
sink.
Anyone who has had diarrhea should
wait for at least two weeks after feeling
better before going swimming.
Don’t swallow the pool water.
Shower before swimming and wash your
hands after using the toilet or changing
diapers.
Change diapers in a bathroom and not at
poolside.
Sink
swim A bacterium called Shigella is making
people in Northern Kentucky ill.
Let’s stop its spread!
Symptoms of Shigella are: diarrhea,
fever, stomach cramps, nausea or
vomiting. If you think you have it,
contact your health care provider and
stay home from school or work.
Wash your hands before you prepare or
eat food, treat a cut or wound, care for
someone who is sick.
Wash your hands after you use the
restroom, change a diaper, or care for
someone who is sick.
Rub hands together for at least 20 seconds.
Use soap. Wash between fingers, under
fingernails, and on the backs of your hands.
Use a towel to dry hands and turn off the
sink.
Anyone who has had diarrhea should
wait for at least two weeks after feeling
better before going swimming.
Don’t swallow the pool water.
Shower before swimming and wash your
hands after using the toilet or changing
diapers.
Change diapers in a bathroom and not at
poolside.
Sink
swim A bacterium called Shigella is making
people in Northern Kentucky ill.
Let’s stop its spread!
Symptoms of Shigella are: diarrhea,
fever, stomach cramps, nausea or
vomiting. If you think you have it,
contact your health care provider and
stay home from school or work.
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Communications
• Weekly “Poo Crew” Meetings
• Weekly updates to Providers:
• Case Numbers
• Symptoms
• Cases Demographics: Ages, Counties, Etc.
• Antibiotic Resistance Info
• Reminder: stay out of pools for 2 weeks!
• Weekly Reports to State
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Totals
• 147 Cases
• 133 Lab Confirmed; 13 Epi-linked
• 64% Were associated with Child Care Ctrs
• 18 Child Care Centers
• 13 Schools
• Cases Range 5 months old - 84 yrs
• Median age: 4
• Mean Age: 13
• 6 Counties
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011
9/1
3/2
011
9/1
5/2
011
9/1
7/2
011
9/1
9/2
011
Nu
mb
er
of
Cases
Date of illness onset
Epi Curve for Shigella in Northern KY
probable lab confirmed
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6
8
18
9
4
5
10
8
7
8
12
5 5
4
3 3
0
1 1
7
3
2 2
1
0
2
4
6
8
10
12
14
16
18
20
Nu
mb
er
of
Cases
Week of Onset
Shigella Epidemiology Curve by Week of Onset
number of cases
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41
33
30
13 14
3
0
5
10
15
20
25
30
35
40
45
Apr-11 May-11 Jun-11 Jul-11 Aug-11 Sep-11
Nu
mb
er
of
Cases
Date of Onset of Illness
No. of Cases of Shigella in Northern Kentucky by Month of Onset
No. of Cases
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Impact
• Lost Work Days
• Staff
• Parent of Ill Children
• Hospitalizations
• First day care had 26
cases, some out for
several weeks
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What Worked
• Childcare Centers
must report early
• Act early!
• Work as a Team
• Don’t be afraid to
restrict pools
• Communicate:
• Media: Keep the
public Informed!
• Providers Update
• Child Care Centers:
• If diarrhea: Go home!
• Neg Cultures to
return
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Conclusions
• Started out in Child Care Centers, mostly
in Diapered children
• Ended up in the community
• No spread through food or pools
documented
• Early aggressive interventions helped
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Thank You!
Any questions?
“Mr Osborne, may I be
excused? My brain is full.”
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May all your summers be Shigella free!
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