Table 1.
Characteristics of Legionnaires’ disease (LD) cases in Genesee County, MI, in 2014 and 2015.
| Case characteristic | No. of cases (%) | ||
|---|---|---|---|
| 2014 + 2015 () | 2014 () | 2015 () | |
| Sex | |||
| Female | 43 (50) | 22 (56) | 21 (45) |
| Male | 43 (50) | 17 (44) | 26 (55) |
| Age (y) | |||
| Mean | 65 | 63 | 67 |
| Median | 65 | 64 | 66 |
| Range | 26–94 | 26–94 | 35–89 |
| 25–50 | 15 (17) | 7 (18) | 8 (17) |
| 51–64 | 27 (31) | 13 (33) | 14 (30) |
| 65–74 | 20 (23) | 11 (28) | 9 (19) |
| 24 (28) | 8 (21) | 16 (34) | |
| Symptomsa | |||
| Fever | 49/61 (80) | 15/18 (83) | 34/43 (79) |
| Chills | 46/60 (77) | 14/18 (78) | 32/42 (76) |
| Cough | 47/62 (76) | 14/20 (70) | 33/42 (79) |
| Shortness of breath | 48/65 (74) | 15/20 (75) | 33/45 (73) |
| Aches/muscle pains | 35/58 (60) | 12/18 (67) | 23/40 (58) |
| Diarrhea | 32/59 (54) | 8/17 (47) | 24/42 (57) |
| Nausea | 30/63 (48) | 9/20 (45) | 21/43 (49) |
| Vomiting | 35/61 (60) | 6/19 (32) | 16/42 (38) |
| Headaches | 28/60 (47) | 7/20 (35) | 21/40 (53) |
| Comorbiditiesa | |||
| Any chronic health condition | 59/71 (83) | 20/24 (83) | 39/47 (83) |
| Heart disease | 39/69 (57) | 10/24 (42) | 29/45 (64) |
| Diabetes | 28/68 (41) | 11/24 (46) | 17/44 (39) |
| Chronic kidney disease | 22/68 (32) | 11/24 (46) | 11/44 (25) |
| Chronic lung disease | 20/67 (30) | 8/24 (33) | 12/43 (28) |
| Immunocompromised | 19/63 (30) | 8/22 (36) | 11/41 (27) |
| Asthma/chronic bronchitis | 12/67 (18) | 5/24 (21) | 7/43 (18) |
| Smokera | |||
| Current + former | 53/70 (76) | 19/24 (79) | 34/46 (74) |
| Current | 22/70 (31) | 8/24 (33) | 14/46 (30) |
| Not current or former | 17/70 (24) | 5/24 (21) | 12/46 (26) |
| Number of days hospitalized for LD | |||
| Mean | 11 | 14 | 9.5 |
| Median | 10 | 11 | 9 |
| Range | 1–46 | 2–46 | 1–24 |
| Deaths | 10 | 4 | 6 |
a
Data on symptoms, comorbidities, and smoking were not available for all of the cases; the denominator shows the number of cases for which data were available.