Volume 24, Number 1—January 2018
Research Letter
Estimation of Undiagnosed Naegleria fowleri Primary Amebic Meningoencephalitis, United States1
Almea Matanock, Jason M. Mehal, Lindy Liu, Diana M. Blau, and Jennifer R. Cope
Table
Unspecified neuroinfectious death ICD-10 codes by epidemiologic risk factor for primary amebic meningoencephalitis among persons 2–22 years of age, United States, 1999–2010*†
| Male patients (%) | Female patients (%) | ||||
|---|---|---|---|---|---|
| G03.9, Meningitis unspecified |
505 |
257 (51) |
96 (19) |
28 (6) |
28 (6) |
| G04.9, Encephalitis, myelitis and encephalomyelitis, unspecified |
479 |
222 (46) |
135 (28) |
33 (7) |
26 (5) |
| R29.8, Other and unspecified symptoms and signs involving the nervous and musculoskeletal systems |
264 |
112 (42) |
63 (24) |
8 (3) |
13 (5) |
| G00.9, Bacterial meningitis, unspecified |
222 |
105 (47) |
41 (18) |
11 (5) |
11 (5) |
| A86, Unspecified viral encephalitis |
154 |
92 (60) |
40 (26) |
15 (10) |
9 (6) |
| G06.2, Extradural and subdural abscess, unspecified |
59 |
31 (53) |
12 (20) |
4 (7) |
0 |
| A87.9, Viral meningitis, unspecified |
38 |
25 (66) |
13 (34) |
4 (11) |
4 (11) |
| A89, Unspecified viral infection of the central nervous system |
6 |
2 (33) |
3 (50) |
0 |
1 (17) |
| A83.9, Mosquito-borne viral encephalitis, unspecified | 1 | 1 (100) | 1 (100) | 0 | 1 (100) |
*Codes without cases (R83.5, A92.9, A85.2, A84.9, A81.9, A94, A06.6) not listed. ICD-10, International Classification of Disease, 10th revision.
†The total provided is greater than the total number of cases because each case may have >1 ICD-10 code.
‡Arizona, Arkansas, California, Florida, Georgia, Louisiana, Mississippi, Missouri, Nevada, New Mexico, North Carolina, Oklahoma, South Carolina, Texas, and Virginia.
1Preliminary results of this study were presented at the Infectious Diseases Society of America Conference; October 8–12, 2014, Philadelphia, Pennsylvania, USA.
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