Quantitative Exposure Assessment of Enterotoxin-Producing Staphylococcus aureus in Chicken Briyani
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Date
2019
Journal Title
Journal ISSN
Volume Title
Publisher
Excellent Publishers
Abstract
A Quantitative Risk Assessment Model was constructed to estimate the probability that a
serving of Chicken Briyani prepared in the catering units at Tamil nadu, India is
contaminated with S. aureus. Existing data, predictive models and user input were used to
define the input settings. The retail to table pathway was modeled as a series of nodes and
associated pathogen events that included initial contamination of raw chicken at retail,
growth during caterer transport, storage at catering establishments, thermal inactivation
during cooking, post process contamination during serving (on the day consumption) and
storage of leftover (consumption after overnight storage). The extent of S. aureus growth
in each node (with exceptions) were assessed using Combase predictive models whereas
thermal inactivation during cooking was quantified using simple mathematical calculations
as there was no suitable inactivation model for S. aureus. The data, models and user inputs
were entered into an Excel (Microsoft, Redmond, WA) spreadsheet. Modeling @RISK
software (Palisade Corporation) was used to perform Monte Carlo simulation of ~10000
iterations. Results of exposure assessment and probability of illness revealed that 36.67%
of the population consuming chicken briyani is at risk of staphylococcal food intoxication
(at both node 5&6). In 95% of the cases, the probability of getting illness due to the
consumption of S. aureus contaminated Chicken Briyani to at least one recipient is equal
to or less than 0.99 or 99%.
Description
TNV_IJCMAS_2019_8(4)2505-2512
Keywords
Veterinary Science