TABLE 1.
Prevalence of D. fragilis infections in various studies throughout the United States
| Prevalence (%) | Fecal specimens/site | No. of patients | Methoda | Area | Reference |
|---|---|---|---|---|---|
| 2.4 | Parasitology diagnostic laboratory | 14,203 | LM | USA | 61 |
| 4 | Parasitology diagnostic laboratory | 13,194 | LM (C, TS) | Los Angeles, CA | 62 |
| 52 | Adults, semi-communal group | 81 | LM | Los Angeles, CA | 63 |
| 21.1 | Children, dental, general pediatric clinics | 104 | LM | Los Angeles, CA | 63 |
| 1.3 | Homosexual men | 150 | LM | San Francisco, CA | 64 |
| 1.1 | Homosexual men with diarrhea | 274 | LM | Chicago, IL | 65 |
| 1.6 | Public Health laboratories | 3,500 (mean/lab) | LM (C, TS) | USA | 66 |
| 2.3 | Pediatric refugees | 87 | LM | USA | 67 |
| 0.4 | Patients with GI discomfort | 2,604 | LM (WM, TS) | Rocky Mountain region | 68 |
| 5 | Internationally adopted children | 1,042 | LM (TS) | USA | 69 |
| 1.1 | Refugees (worldwide) tested in California | 1,232 | LM (C, TS) | Santa Clara | 70 |
a
C, concentration; LM, light microscopy; TS, trichrome stain; WM, wet mount.