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The Burden of Parasitic Zoonoses in Nepal: A Systematic Review

By B. Devleesschauwer, A. Ale, P. Torgerson, N. Praet, C. Mairtens de Noordhout, B.D. Pandey, S.B. Pun, R. Lake, J. Vercruysse, D.D. Joshi, A.H. Havelaar, L. Duchateau, P. Dorny, N. Speybroek

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Abstract

Background

Parasitic zoonoses (PZs) pose a significant but often neglected threat to public health, especially in developing countries. In order to obtain a better understanding of their health impact, summary measures of population health may be calculated, such as the Disability-Adjusted Life Year (DALY). However, the data required to calculate such measures are often not readily available for these diseases, which may lead to a vicious circle of under-recognition and under-funding.

Methodology

We examined the burden of PZs in Nepal through a systematic review of online and offline data sources. PZs were classified qualitatively according to endemicity, and where possible a quantitative burden assessment was conducted in terms of the annual number of incident cases, deaths and DALYs.

Principal Findings

Between 2000 and 2012, the highest annual burden was imposed by neurocysticercosis and congenital toxoplasmosis (14,268 DALYs [95% Credibility Interval (CrI): 5450–27,694] and 9255 DALYs [95% CrI: 6135–13,292], respectively), followed by cystic echinococcosis (251 DALYs [95% CrI: 105–458]). Nepal is probably endemic for trichinellosis, toxocarosis, diphyllobothriosis, foodborne trematodosis, taeniosis, and zoonotic intestinal helminthic and protozoal infections, but insufficient data were available to quantify their health impact. Sporadic cases of alveolar echinococcosis, angiostrongylosis, capillariosis, dirofilariosis, gnathostomosis, sparganosis and cutaneous leishmaniosis may occur.

Conclusions/Significance

In settings with limited surveillance capacity, it is possible to quantify the health impact of PZs and other neglected diseases, thereby interrupting the vicious circle of neglect. In Nepal, we found that several PZs are endemic and are imposing a significant burden to public health, higher than that of malaria, and comparable to that of HIV/AIDS. However, several critical data gaps remain. Enhanced surveillance for the endemic PZs identified in this study would enable additional burden estimates, and a more complete picture of the impact of these diseases.

Submitter

Angel Tobey

Purdue University

Date 2014
Publication Title PLOS Neglected Tropical Diseases
Volume 8
Issue 1
Pages 13
DOI 10.1371/journal.pntd.0002634
URL http://www.plosntds.org/article/info%3Adoi%2F10.1371%2Fjournal.pntd.0002634
Language English
Additional Language English
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Tags
  1. Animal health and hygiene
  2. Animal parasitic diseases
  3. Animal roles
  4. Animal welfare
  5. Central nervous system infections
  6. Diseases
  7. Diseases and injuries of animals
  8. Global health
  9. Human-animal interactions
  10. Human health
  11. Infections
  12. Nepal
  13. Parasites
  14. Parasitic diseases
  15. pathogens
  16. Public health
  17. Studies
  18. Zoonoses