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Report for Week Ending October 24, 2009
?15% of outpatient visits statewide met the
criteria for influenza-like illness<sup>1</sup> (ILI) for the
current reporting week, which is a decrease from
the 18% reported during the week ending Oct.
17;
? 45% of patients seen for ILI by sentinel
physicians were in the 5-24 year age group; and
? the OSDH Public Health Laboratory (PHL) tested
204 specimens, of which 166 (81%) were
positive for influenza. Of the 166 positive results,
165 (99%) of the positive specimens were
confirmed as swine-origin influenza A (H1N1) and
one specimen tested positive for influenza type B.
Influenza Hospitalization Surveillance
September 1 - October 24, 2009:
? 678 reported cases of influenza-associated
hospitalizations;
? 403 (59%) of the 678 hospitalizations were in
patients under 19 years of age;
? 41 (6%) of those hospitalized were pregnant
women;
? 87 patients have been admitted to the ICU, of
which 32 (37%) patients were under 19 years of
age;
? The race-specific incidence rate per 100,000
population of influenza-associated hospitalizations
were highest for African American children less
than 19 years (70), followed by Hispanic (49),
Native American (38), and White children (33).
Influenza-Associated Mortality Surveillance:
? Six influenza-associated deaths were reported
during October 18 through October 24 resulting in
a total of 17 reported influenza-associated deaths
since surveillance began September 1, 2009.
o Reported deaths have been among individuals
in the following age groups: 6 were children
less than 19 years of age; 6 were adults 25-
49 years of age; 4 were adults 50-64 years
of age; 1 was an adult 65 years and older.
o 10 of 17 influenza-associated deaths had
documented history of underlying medical
conditions that may have increased their risk
of illness, including asthma and other
respiratory conditions (4), diabetes (2),
obesity (2), or an immunocompromising
condition (2).
o County of residence: Oklahoma (5), Tulsa (4),
Carter (2), Cleveland (2), Canadian,
Comanche, LeFlore, and Noble; and
o Of the six influenza-associated deaths
among patients less than 19 years of age,
two had underlying medical conditions that
may have increased their risk of illness. One
case was an infant less than 6 months of age.
<sup>1</sup>Influenza-like illness is defined as having a fever (>100?F) combined with a cough and/or a sore throat
?15% of outpatient visits statewide met the
criteria for influenza-like illness<sup>1</sup> (ILI) for the
current reporting week, which is a decrease from
the 18% reported during the week ending Oct.
17;
? 45% of patients seen for ILI by sentinel
physicians were in the 5-24 year age group; and
? the OSDH Public Health Laboratory (PHL) tested
204 specimens, of which 166 (81%) were
positive for influenza. Of the 166 positive results,
165 (99%) of the positive specimens were
confirmed as swine-origin influenza A (H1N1) and
one specimen tested positive for influenza type B.
Influenza Hospitalization Surveillance
September 1 - October 24, 2009:
? 678 reported cases of influenza-associated
hospitalizations;
? 403 (59%) of the 678 hospitalizations were in
patients under 19 years of age;
? 41 (6%) of those hospitalized were pregnant
women;
? 87 patients have been admitted to the ICU, of
which 32 (37%) patients were under 19 years of
age;
? The race-specific incidence rate per 100,000
population of influenza-associated hospitalizations
were highest for African American children less
than 19 years (70), followed by Hispanic (49),
Native American (38), and White children (33).
Influenza-Associated Mortality Surveillance:
? Six influenza-associated deaths were reported
during October 18 through October 24 resulting in
a total of 17 reported influenza-associated deaths
since surveillance began September 1, 2009.
o Reported deaths have been among individuals
in the following age groups: 6 were children
less than 19 years of age; 6 were adults 25-
49 years of age; 4 were adults 50-64 years
of age; 1 was an adult 65 years and older.
o 10 of 17 influenza-associated deaths had
documented history of underlying medical
conditions that may have increased their risk
of illness, including asthma and other
respiratory conditions (4), diabetes (2),
obesity (2), or an immunocompromising
condition (2).
o County of residence: Oklahoma (5), Tulsa (4),
Carter (2), Cleveland (2), Canadian,
Comanche, LeFlore, and Noble; and
o Of the six influenza-associated deaths
among patients less than 19 years of age,
two had underlying medical conditions that
may have increased their risk of illness. One
case was an infant less than 6 months of age.
<sup>1</sup>Influenza-like illness is defined as having a fever (>100?F) combined with a cough and/or a sore throat
