Alaska Invasive Bacterial Disease Surveillance Report Streptococcus pneumoniae – 2013

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Background

AIP has conducted statewide surveillance of invasive Streptococcus pneumoniae since 1986.  Beginning in January, 2007, invasive S. pneumoniae became a reportable condition to the State of Alaska Division of Public Health (DPH).  Reports of cases of disease caused by this organism are shared between AIP and DPH.

Population

The population of the State of Alaska in 2013 was 736,399; 142,989 (19%) were Alaska Native people.  Source:  AK Dept. of Labor & Workforce Development population estimates.

Case Definition

An isolate of Streptococcus pneumoniae from a normally sterile site that has been taken from a resident of Alaska.

Methods

Participating laboratories send isolates recovered from sterile sites to the AIP laboratory in Anchorage; materials and forms for isolate shipment and data collection are provided to each laboratory by AIP.  Demographic and clinical information on the cases are collected from a review of medical records.  Annually, AIP asks that each laboratory review their records and provide information on any cases that may have been overlooked.

Invasive Streptococcus pneumoniae Cases by Race – Alaska, 2013
Race Cases
n (%)		 Age Adjusted Rate* % Male Deaths
n (%)
Alaska Native 50 (47) 36.9 62% 12 (24)
Non-Native† 56 (53)† 8.7 63% 5 (9)
Total 106 62% 17 (16)

*Cases per 100,000 per percent distribution of Alaska 2010 population
†Includes 10 cases for which race was unknown

Invasive Streptococcus pneumoniae, Cases & Rates by Age Group & Race – Alaska, 2013
Alaska Native Non-Native
Age (years) No. Cases Rate* No. Cases Rate*
<2 6 102.5 4 26.3
2-4 4 42.7 3 12.6
5-18 5 13 2 1.9
19-54 18 27 15 4.9
55-64 11 83.8 10 11.9
65+ 6 63.5 22 37.7
Total 50 35 56 9.4

*Cases per 100,000 population

Invasive Streptococcus pneumoniae, Clinical Presentations – Alaska, 2013
No. %*
Pneumonia with bacteremia 65 61
Bacteremia 24 23
Meningitis 6 6
Empyema 3 3

*Percent of cases

Antibiotic Resistance in Invasive Streptococcus pneumoniae Isolates – Alaska, 2013
Antibiotic S*% I†% R‡%
Penicillin 87 0 13
TMP-sulfa 92 3 5
Erythromycin 84 0 16
Ceftriaxone 97 3 0
Tetracycline 94 0 6
Chloramphenicol 98 0 2
Vancomycin 100 0 0
Levofloxacin 100 0 0
Clindamycin 96 0 4

*Susceptible, †Intermediate, ‡Resistant based on year 2013 CLSI definition

Proportion of Invasive Isolates Contained in the PCV13 Vaccine by Age Group – Alaska, 2013
Age (yrs) Total (%)
<2 2 (20%) of 10
2-4 0 (0%) of 7
5+ 13 (16%) of 83
Total 15 (15%) of 100
Page last reviewed: June 18, 2018
Content source: National Center for Emerging and Zoonotic Infectious Diseases (NCEZID), Division of Infectious Disease Readiness Innovation (DIDRI)