Volume 32, Number 7—July 2026
Research Letter
Chikungunya Outbreak, Cuba, July 2025
Melissa M. Perez1, Sonia Resik1, Berta Maria Bello Rodriguez, Ariamys Companioni, Daniel Gonzalez, Ana Julia Benitez, Yanet Martinez, Mónica Sanchez, Mayling Alvarez, Denelsys Hernandez, Jose Raul de Armas, Aliuska Batista Serrano, Madelaine Rivera, Carilda Peña, Liannet Domínguez Ramos, Silvia Serrano, Rosario Gravier, Lorena Vazquez, Vivian Kourí, and Maria G. Guzman
Table
Characteristics of samples collected from symptomatic patients during chikungunya outbreak, Matanzas Province, Cuba, 2025*
| Municipality | No. tested | Epidemiologic week collected | Mean (range) days of sample collection† | CHIKV-positive |
DENV-positive |
|||
|---|---|---|---|---|---|---|---|---|
| No. (%) | Mean (range) Ct value‡ | No. (%) | Mean Ct value‡ | |||||
| Perico | 12 | 29 | 6.5 (2–11) | 8 (67) | 30.40 (24.25–35.03) | 1 (6.6) | 37.8 | |
| 15 |
30 |
1 (1–3) |
15 (100) |
23.05 (19.10–30.50) |
1 (6.6) |
39.7 |
||
| Cardenas |
2 |
28–29 |
6 (6–6) |
0 |
NA |
0 |
NA |
|
| Jovellanos |
3 |
28–30 |
6 (6–8) |
0 |
NA |
1 (33.3) |
39.3 |
|
| Colon |
27 |
27–30 |
6 (6–6) |
0 |
NA |
0 |
NA |
|
| Limonar |
3 |
28 |
6 (6–10) |
0 |
NA |
0 |
NA |
|
| Matanzas city |
4 |
28 |
4 (1–9) |
0 |
NA |
1 (25) |
39.6 |
|
| Total | 66 | NA | 5.07 (1–9) | 23 (34.8) | NA | 4 (6.06) | NA | |
*Internal control was positive for all tested samples by quantitative reverse transcription PCR. One sample from Perico municipality tested positive for both CHIKV and DENV. CHIKV, chikungunya virus; Ct, cycle threshold; DENV, dengue virus; NA, not applicable. †Days of sample collection from illness onset. ‡Ct threshold was <40 for both CHIKV and DENV by quantitative reverse transcription PCR.
1These authors contributed equally to this article.
Page created: May 28, 2026
Page updated: June 26, 2026
Page reviewed: June 26, 2026
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