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Related Concept Videos

What is Weather?01:07

What is Weather?

Overview
Infectious Diseases and Their Occurrence01:28

Infectious Diseases and Their Occurrence

Infectious diseases appear in populations through various transmission patterns, influenced by pathogen characteristics, population immunity, environmental conditions, and social behavior. Understanding these patterns is essential for effective public health surveillance and intervention. These categories—sporadic, outbreak, epidemic, pandemic, and endemic—help frame the nature and scope of disease events.Sporadic diseases occur irregularly and infrequently, without a predictable temporal or...
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Malaria

Malaria pathogenesis in humans reflects a delicate interplay between parasite biology and host response. Clinical illness reflects a host’s immune response to the parasite’s asexual replication cycle, which is often asymptomatic in individuals with partial immunity. From the parasite's perspective, transmission between mosquito and human with minimal host pathology is evolutionarily advantageous. Among the six Plasmodium species infecting humans, P. falciparum and P. vivax dominate in global...
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Investigation of Disease Outbreaks

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Patterns of Fever01:26

Patterns of Fever

Before understanding the types and patterns of fever, it is essential to know its phases.

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Related Experiment Video

Updated: Jun 27, 2026

Use of Galleria mellonella as a Model Organism to Study Legionella pneumophila Infection
12:30

Use of Galleria mellonella as a Model Organism to Study Legionella pneumophila Infection

Published on: November 22, 2013

Weather patterns and Legionnaires' disease: a meteorological study.

K D Ricketts1, A Charlett, D Gelb

  • 1Respiratory and Systemic Infections Department, Centre for Infections Health Protection Agency, London, UK. katherine.ricketts@HPA.org.uk

Epidemiology and Infection
|November 20, 2008
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Summary

Meteorological conditions, specifically humidity and temperature, significantly impact Legionnaires

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Area of Science:

  • Environmental Epidemiology
  • Infectious Disease Surveillance
  • Public Health Meteorology

Background:

  • Legionnaires' disease is a severe respiratory infection.
  • Understanding environmental risk factors is crucial for public health.
  • A notable increase in cases occurred in 2006.

Purpose of the Study:

  • To investigate the influence of meteorological factors on community-acquired Legionnaires' disease.
  • To analyze the relationship between weather variables and disease incidence in England and Wales (2003-2006).
  • To explore potential interactions between weather, time of year, and disease occurrence.

Main Methods:

  • Case-crossover study design utilizing conditional logistic regression.
  • Analysis of 674 community-acquired Legionnaires' disease cases from 2003-2006.
  • Inclusion of relative humidity during incubation and temperature in the preceding 10-14 weeks as key variables.

Main Results:

  • A significant interaction between year, relative humidity, and temperature was observed during July-September.
  • Meteorological conditions were identified as key drivers for Legionnaires' disease outbreaks.
  • The findings highlight specific weather patterns associated with increased disease risk.

Conclusions:

  • Environmental factors, particularly humidity and temperature, play a critical role in Legionnaires' disease transmission.
  • The identified interactions suggest a need for predictive modeling based on meteorological data.
  • These insights are vital for forecasting case numbers and allocating public health resources effectively.