Critical community size
Minimum size of a closed population within which a pathogen can persist indefinitely
The critical community size (CCS) is the minimum size of a closed population within which a human-to-human, non-zoonotic pathogen can persist indefinitely.[1]
When the size of the closed population falls below the critical community size level, the low density of infected hosts causes extinction of the pathogen.[2] This epidemiologic phenomenon was first identified during measles outbreaks in the 1950s.[1]
The critical community size depends on:[citation needed]
- Speed of transmission
- How long until a person who has recovered remains immune
- Fatality rate
- Birth and death rate in the general population
See also
- Compartmental models in epidemiology – Type of mathematical model used for infectious diseases
- Epidemiology – Study of health and disease within a population
- Force of infection – Rate at which susceptible individuals acquire an infectious disease
- Mathematical modelling of infectious disease – Using mathematical models to understand infectious disease transmissionPages displaying short descriptions of redirect targets
- Transmission risks and rates
References
- ^ a b Bartlett, M. S. (1960). "The critical community size for measles in the United States". Journal of the Royal Statistical Society. Series A (General). 123 (1): 37–44. doi:10.2307/2343186. JSTOR 2343186.
- ^ Haydon, Daniel T; Cleaveland, Sarah; Taylor, Louise H; Laurenson, M Karen (2002). "Identifying reservoirs of infection: a conceptual and practical challenge". Emerging Infectious Diseases. 8 (12): 1468–1473. doi:10.3201/eid0812.010317. PMC 2738515. PMID 12498665.
External links
- The Collection of Biostatistics Research Archive
- 'Epidemiology' – In: Philip S. Brachman, Medical Microbiology (fourth edition), US National Center for Biotechnology Information
- Monash Virtual Laboratory - Simulations of epidemic spread across a landscape
- People's Epidemiology Library
- v
- t
- e
Concepts in infectious disease (Outline)
Agent |
|
---|---|
Host |
|
Environment |
|
Basic concepts | |||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Modes |
| ||||||||||||||||||||||||||||
Modelling | |||||||||||||||||||||||||||||
Occurrence in population |
location
- Respiratory
- Gastrointestinal
- Genitourinary
- Nervous system
- Skin
- Soft tissue
- Bone
- Joint
- Cardiovascular
- Systemic/Generalized
- Blood
- Tooth
- Mouth
- Fetus
- Eye
and Control
measures
Pharmaceutical | |
---|---|
Non- pharmaceutical |
|
infections
- Antigenic drift
- Antigenic shift
- Antimicrobial resistance surveillance
- Biosecurity
- CRISPR
- Disease X
- Emergent virus
- Evolutionary epidemiology
- Genetic epidemiology
- Global Health Initiatives
- Microbial phylogenetics
- One Health Model
- Genomic reassortment
- Re-emerging disease
- Reverse zoonosis
- Selection pressure
- Synthetic biology
- Viral phylodynamics
- Discovery
- Eradication
- Economics of Infectious Diseases
- Infectious disease (medical specialty)
- Infectious disease informatics
- Microbial bioterrorism
- Pandemic prevention
- Tropical disease
This virus-related article is a stub. You can help Wikipedia by expanding it. |
- v
- t
- e