Record Details

Participatory probabilistic assessment of the risk to human health associated with cryptosporidiosis from urban dairying in Dagoretti, Nairobi, Kenya

CGSpace

View Archive Info
 
 
Field Value
 
Title Participatory probabilistic assessment of the risk to human health associated with cryptosporidiosis from urban dairying in Dagoretti, Nairobi, Kenya
 
Creator Grace, Delia
Monda, J.
Karanja, N.
Randolph, Thomas F.
Kang'ethe, Erastus K.
 
Subject animal diseases
zoonoses
health
 
Description We carried out a participatory risk assessment to estimate the risk (negative consequences and their likelihood) from zoonotic Cryptosporidium originating in dairy farms in urban Dagoretti, Nairobi to dairy farm households and their neighbours. We selected 20 households at high risk for Cryptosporidium from a larger sample of 300 dairy households in Dagoretti based on risk factors present. We then conducted a participatory mapping of the flow of the hazard from its origin (cattle) to human potential victims. This showed three main exposure pathways (food and water borne, occupational and recreational). This was used to develop a fault tree model which we parameterised using information from the study and literature. A stochastic simulation was used to estimate the probability of exposure to zoonotic cryptosporidiosis originating from urban dairying. Around 6 % of environmental samples were positive for Cryptosporidium. Probability of exposure to Cryptosporidium from dairy cattle ranged from 0.0055 for people with clinical acquired immunodeficiency syndrome in non-dairy households to 0.0102 for children under 5 years from dairy households. Most of the estimated health burden was born by children. Although dairy cattle are the source of Cryptosporidium, the model suggests consumption of vegetables is a greater source of risk than consumption of milk. In conclusion, by combining participatory methods with quantitative microbial risk assessment, we were able to rapidly, and with appropriate ‘imprecision’, investigate health risk to communities from Cryptosporidium and identify the most vulnerable groups and the most risky practices.
 
Date 2012-09
2012-08-24T19:52:54Z
2012-08-24T19:52:54Z
 
Type Journal Article
 
Identifier Grace, D., Monda, J., Karanja, N., Randolph, T.F. and Kang'ethe, E.K. 2012. Participatory probabilistic assessment of the risk to human health associated with cryptosporidiosis from urban dairying in Dagoretti, Nairobi, Kenya. Tropical Animal Health and Production 44(Suppl 1): S33-S40.
0049-4747
1573-7438
https://hdl.handle.net/10568/21690
https://doi.org/10.1007/s11250-012-0204-3
 
Language en
 
Rights Copyrighted; all rights reserved
Limited Access
 
Publisher Springer
 
Source Tropical Animal Health and Production