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Space-time epidemiology of Crimean-Congo hemorrhagic fever (CCHF) in Iran

Mohsen Ahmadkhani1, Ali Asghar Alesheikh1, Sahar Khakifirouz2

  • 1Department of Geospatial Information System (GIS), K. N. Toosi University of Technology, Tehran, Iran.

Ticks and Tick-Borne Diseases
|September 26, 2017
PubMed

Insights

Crimean-Congo hemorrhagic fever (CCHF) incidence in Iran is strongly clustered spatially and temporally. Hotspots were identified in eastern, southern, and western regions, particularly during summer months and peak years like 2009 and 2013.

Area of Science:

  • Epidemiology
  • Spatial analysis
  • Public health

Background:

  • Crimeyan-Congo hemorrhagic fever (CCHF) poses significant health and economic challenges in endemic Iran.
  • Understanding CCHF's spatiotemporal dynamics is crucial for effective disease control.

Purpose of the Study:

  • To analyze the spatial and temporal distribution of CCHF cases in Iran from 2000 to 2014.
  • To identify geographical and temporal clusters (hotspots) of CCHF incidence.

Main Methods:

  • Cross-sectional survey of 1027 CCHF cases (2000-2014).
  • Global Moran's I for spatial pattern analysis.
  • Spatial and space-time scan statistics to detect clusters.

Main Results:

  • CCHF incidence exhibits significant spatial clustering (p<0.01).
  • Three major spatial clusters identified in eastern, southern, and western Iran.
  • Highest incidence occurred in the east (2006-2012); clusters peaked in 2009 and 2013, predominantly in summer.

Conclusions:

  • CCHF distribution in Iran is characterized by distinct spatial and temporal clustering.
  • Identifying hotspots aids targeted interventions and resource allocation.
  • Further research into environmental factors influencing seasonal clusters is warranted.

Keywords:
CCHFEpidemiologyGeographic information systemIranSpace-time analysisTick-borne disease

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