National burden of influenza-associated hospitalizations in Cambodia, 2015 and 2016

Vanra Ieng; M Ximena Tolosa; Bunchhoeng Tek; Borann Sar; Kheng Sim; Heng Seng; Miliya Thyl; Chan Dara; Mey Moniborin; Rebekah J Stewart; Leila Bell; Georgios Theocharopoulos; Savuth Chin; Darapheak Chau; A Danielle Iuliano; Ann Moen; Reiko Tsuyuoka; Erica Dueger; Sheena Sullivan; Sovann Ly

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National burden of influenza-associated hospitalizations in Cambodia, 2015 and 2016

Author: Vanra Ieng ¹ ; M Ximena Tolosa ² ; Bunchhoeng Tek ³ ; Borann Sar ⁴ ; Kheng Sim ³ ; Heng Seng ³ ; Miliya Thyl ⁵ ; Chan Dara ⁶ ; Mey Moniborin ⁷ ; Rebekah J Stewart ⁸ ; Leila Bell ⁹ ; Georgios Theocharopoulos ¹ ; Savuth Chin ¹⁰ ; Darapheak Chau ¹⁰ ; A. Danielle Iuliano ⁸ ; Ann Moen ⁸ ; Reiko Tsuyuoka ¹ ; Erica Dueger ⁸ ; Sheena Sullivan ¹¹ ; Sovann Ly ³
Author Information

1. World Health Organization, Country Office, Phnom Penh, Cambodia
2. National Centre for Epidemiology and Population Health, The Australian National University, Australia
3. Communicable Disease Control Department, Ministry of Health, Phnom Penh, Cambodia
4. Centers for Disease Control and Prevention, Country Office, Phnom Penh, Cambodia
5. Angkor Hospital for Children, Siem Reap, Cambodia
6. Svay Rieng Provincial Hospital, Cambodia
7. Kampong Cham Provincial Hospital, Cambodia
8. Centers for Disease Control and Prevention, Atlanta, USA
9. Emerging Disease Surveillance and Response, World Health Organization Regional Office for the Western Pacific, Manila, Philippines
10. National Public Health Laboratory, National Institute of Public Health, Phnom Penh, Cambodia
11. Menzies School of Health Research, Charles Darwin University, Casuarina, Darwin, Northern Territory, Australia
Publication Type:Journal Article
From: Western Pacific Surveillance and Response 2018;9(5):44-52
CountryWHO-WPRO
Language:English
Abstract: Introduction:The burden of influenza in Cambodia is not well known, but it would be useful for understanding the impact of seasonal epidemics and pandemics and to design appropriate policies for influenza prevention and control. The severe acute respiratory infection (SARI) surveillance system in Cambodia was used to estimate the national burden of SARI hospitalizations in Cambodia.
Methods:We estimated age-specific influenza-associated SARI hospitalization rates in three sentinel sites in Svay Rieng, Siem Reap and Kampong Cham provinces. We used influenza-associated SARI surveillance data for one year to estimate the numerator and hospital admission surveys to estimate the population denominator for each site. A national influenza-associated SARI hospitalization rate was calculated using the pooled influenza-associated SARI hospitalizations for all sites as a numerator and the pooled catchment population of all sites as denominator. National influenza-associated SARI case counts were estimated by applying hospitalization rates to the national population.
Results:The national annual rates of influenza-associated hospitalizations per 100 000 population was highest for the two youngest age groups at 323 for <1 year and 196 for 1–4 years. We estimated 7547 influenza-associated hospitalizations for Cambodia with almost half of these represented by children younger than 5 years.
Discussion:We present national estimates of influenza-associated SARI hospitalization rates for Cambodia based on sentinel surveillance data from three sites. The results of this study indicate that the highest burden of severe influenza infection is borne by the younger age groups. These findings can be used to guide future strategies to reduce influenza morbidity.
Full text:wpsar.2018.9.5.011_09.pdf