Legionellosis in Poland in 2015

Area of Science:

• Epidemiology
• Infectious Diseases
• Public Health Surveillance

Background:

• Legionellosis, encompassing Legionnaires' disease and Pontiac fever, is a notifiable infection in Poland.
• Understanding the epidemiological trends of legionellosis is crucial for public health interventions.

Purpose of the Study:

• To assess the epidemiological situation of legionellosis in Poland in 2015.
• To compare 2015 data with previous years to identify trends and patterns.

Main Methods:

• Review of annual bulletins on infectious diseases and poisonings in Poland.
• Analysis of legionellosis case reports submitted to the Department of Epidemiology.

Main Results:

• In 2015, 23 cases of Legionnaires' disease were reported; no Pontiac fever cases were recorded.
• The incidence rate slightly increased compared to the previous year and the 2009-2013 median.
• Males were disproportionately affected (0.097 per 100,000) compared to females (0.025); four fatal cases were reported.

Conclusions:

• Legionellosis is likely under-recognized and under-diagnosed across Poland.
• Geographical variations in incidence may be linked to differences in laboratory diagnostic availability.
• Current case detection numbers, without data on testing volume, are insufficient for a comprehensive epidemiological assessment.