QMRA Introduction
Giardiasis is not associated with mortality except in rare cases of extreme dehydration, primarily in infants or malnourished children (Medscape)
Hosts
Human and animal [1]
Transmission / Exposure Route
Fecal-oral transmission or ingestion of contaminated water. Contaminated food is a less common etiology. Person-to-person spread is common.[1]
Case Fatality Ratio
Giardiasis is not associated with mortality except in rare cases of extreme dehydration, primarily in infants or malnourished children [2]
Incubation Period
Averages 1-2 weeks, with a mean of 9 days[2]
Burden of Disease
It is reported that the national giardiasis cases were 7.5, 7.6 and 7.4 per 100,000 population in 2006, 2007, and 2008[3]
Duration of Infectiousness and disease
Symptomology
Latency
Asymptomatic Rates
Excretion Rates (see Exposure)
Immunity
Microbiology
A microscopic parasite that causes the diarrheal illness known as giardiasis[3]
Dose Response Models
Route: oral, Response: infection
exponential
\[P(response)=1-exp(-k\times dose)\]
Optimized parameters:
Data from Other Sources
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