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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 | Collection epidemiologic week | 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 qRT-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; qRT-PCR, quantitative reverse transcription PCR. †Days of sample collection from illness onset. ‡Ct threshold was <40 for both CHIKV and DENV by qRT-PCR.
1These authors contributed equally to this article.
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