Table 1. Patient population for serologic studies.
| Group | Source of population | No. |
| Control | United States | 72 |
| Onchocerciasis (MF+) | Guatemala | 11 |
| Ecuador | 21 | |
| Cameroon* | 4 | |
| Sierra Leone | 2 | |
| Loiasis (MF+) | Benin | 90 |
| Wuchereria bancrofti (MF+) | Cook Islands | 3 |
| Comoros Islands | 2 | |
| Guyana | 1 | |
| India | 84 | |
| Strongyloides stercoralis | SE Asia | 27 |
| Miscellaneous | Hyper-IgE syndrome (HIE) | 4 |
| Hypereosinophilic syndrome (HES) | 4 | |
| Non-filarial parasitic infections | 4 |
*: Negative for daytime microfilariae of Loa loa and negative for W. bancrofti circulating filarial antigen.