Volume 5, Number 6—December 1999
Research
Epidemiologic Studies of Cyclospora cayetanensis in Guatemala
Caryn Bern*†
, Beatriz Hernandez†, Maria Beatriz Lopez†, Michael J. Arrowood*, Maricruz Alvarez de Mejia†, Ana Maria de Merida†, Allen W. Hightower*, Linda Venczel‡, Barbara L. Herwaldt*, and Robert E. Klein†
, Beatriz Hernandez†, Maria Beatriz Lopez†, Michael J. Arrowood*, Maricruz Alvarez de Mejia†, Ana Maria de Merida†, Allen W. Hightower*, Linda Venczel‡, Barbara L. Herwaldt*, and Robert E. Klein†
Table 1
Prevalence of Cyclospora in specimens from outpatients attending three hospitals and two health centers. April 6, 1997, to March 19, 1998
| Prevalence by presence of symptoms | ||||||||
|---|---|---|---|---|---|---|---|---|
| Prevalence by age group | n/N (%) with | n/N (%) without | ||||||
| Age (yrs) | na/Nb | (%) | RR (95% CI)c | gastroenteritis | gastroenteritis | RR (95% CI)d | ||
| <1.5 | 10/844 | (1.2) | 1.7 (0.8, 3.8) | 7/502 | (1.4) | 3/330 | (0.9) | 1.5 (0.4, 5.9) |
| 1.5-4 | 41/1,160 | (3.5) | 5.1 (2.8, 9.1) | 31/583 | (5.3) | 10/567 | (1.8) | 3.0 (1.5, 6.1) |
| 5-9 | 31/813 | (3.8) | 5.5 (3.0, 10.1) | 22/451 | (4.9) | 8/354 | (2.3) | 2.2 (1.0, 4.8) |
| 10-14 | 4/328 | (1.2) | 1.8 (0.6, 5.2) | 2/147 | (1.4) | 2/176 | (1.1) | 1.2 (0.2, 8.4) |
| >14 | 15/2150 | (0.7) | Referent | 8/958 | (0.8) | 7/1,181 | (0.6) | 1.4 (0.5, 3.9) |
| All ages | 101/5,295e | (1.9) | -- | 70/2,641 | e (2.7) | 30/2,609e | (1.1) | 2.3 (1.5, 3.5) |
an represents the number positive for Cyclospora
.bN represents the number of specimens in each category.
cEach age group compared with patients >14 years of age.
dSpecimens associated with gastroenteritis versus those without gastroenteritis.
eApparent inconsistencies in denominator data are due to the following missing data and exclusions. Data for 32 patients of the clinic serving the HIV-infected population were excluded. Age and symptom data were missing for 187 specimens; symptom data only were missing for 45 specimens.
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