The epidemiology of 32 selected communicable diseases in Iraq, 2004-2016

The 2003 invasion of Iraq significantly undermined population health. However, there is a lack of understanding of how it undermined communicable disease control. This study was performed to assess the incidence trends of 32 communicable diseases in post-conflict Iraq.

Reported incidence data for 32 communicable diseases (2004-2016) were collected from routine reports sent to the Iraqi Ministry of Health by primary health centers, and general and tertiary hospitals. Incidence (per 100 000) was defined as the number of reported incident cases divided by the population size. Joinpoint regression was used to examine the incidence trends and average annual percentage change (AAPC) for each disease, and the overall incidence rate across the period.

Communicable diseases increased significantly during the peak years of the war, especially during the US troop surge period (2007-2009). As US troops withdrew (after 2011), overall communicable diseases decreased. The incidence rate of nearly half of the 32 diseases decreased significantly, while the incidence rate of five increased significantly (hepatitis A, varicella, viral meningitis, cutaneous leishmaniasis, extrapulmonary tuberculosis).

The early foundational strength of Iraq's health system may help explain why infectious disease failed to overwhelm the population following the invasion. Iraq's federal government could exercise its legal authority to manage threats to public health security by expanding the disease surveillance system.