Andorra Sees Record 58 Chlamydia Cases in 2025 Amid Shifting STI Trends

Andorra recorded 58 chlamydia cases in 2025, the highest figure in five years, while gonorrhea notifications fell to 14, syphilis eased to eight, and HIV diagnoses rose to 10, according to the health ministry's surveillance report on mandatory notifiable diseases from 2021 to 2025.

Data from the Prevention, Promotion and Health Surveillance department, drawn from six of seven microbiology labs, show chlamydia climbing from 48 cases in 2024 to 58 last year, yielding an incidence rate of 65.13 per 100,000 residents. The rise concentrated among younger people, with about 30 cases in the 20-29 age group—mostly women—and six among girls aged 15-19. Gonorrhea dropped from 31 cases in 2024 after peaking at 28 in 2023. Syphilis notifications declined from 11 to eight, while HIV cases increased from eight in 2024 to 10. No new syphilis or HIV infections were reported in rapid tests at primary care centres, though two positives—one syphilis and one HIV—emerged among 461 tests conducted last year, out of 630 total since the program's March 2025 launch, which also screens for hepatitis B and C.

Health Minister Helena Mas told parliament late last year that sexually transmitted infection upticks reflect more unprotected sex, higher partner numbers, and better testing access. The ministry shifted to automated, nominal reporting for STIs in 2023, improving data quality from shared clinical records.

Other trends included two mpox cases—up slightly from prior years—four human papillomavirus infections, two meningitis cases within normal ranges, and nine non-meningococcal meningitides, rising from three. Three cholera cases and 12 food poisonings—twice 2024's total, seven linked to home consumption of mushrooms or fish—were noted. Herpes zoster cases stood at 131, following 130 in 2024, due to methodological changes.

Influenza hit a rate of 1,868.8 per 100,000 residents with 1,659 confirmed cases, up from 608, driven by overlapping seasonal peaks in late 2024-25 and early 2025-26, plus viral antigenic shifts boosting susceptibility.

Varicella surged to 44 cases from 29, the five-year high with an incidence of 49.41 per 100,000, including five school outbreaks. Doctor Mireia García from health surveillance noted the disease is milder in children than adults and linked the rise partly to better reporting and unvaccinated adolescents. The ministry promoted catch-up vaccinations for those born before 2016, when varicella entered the childhood schedule. García said monitoring continues into 2026, expecting declines despite incomplete coverage.

Influenza and varicella made up 95% of frequent disease notifications. Officials are tracking 2026 developments.