TB Contact Tracing Investigation: A 3D Simulation |…

What the Simulation Represents

The simulation models tuberculosis contact tracing in a three-dimensional environment, providing a realistic visualization of how an index case can infect others through close and casual contacts. Each spherical shell represents a ring of secondary infections, illustrating the spread pattern of TB.

By adjusting parameters such as the infectiousness level of the index case and the number of identified close contacts, users can observe how these factors influence the overall transmission dynamics.

Key Concepts in TB Contact Tracing

The simulation is based on the principles of directly observed therapy (DOT) for tuberculosis. This method ensures that patients take their medication as prescribed by a healthcare provider, reducing the risk of drug-resistant strains developing.

Secondary latent tuberculosis infection (LTBI) rate refers to the likelihood of individuals becoming infected after exposure to an index case. The simulation calculates this rate based on the infectiousness and number of close contacts.

live demo · related simulation● LIVE

How It Works

The simulation uses a golden-spiral point distribution algorithm to create concentric spherical shells around the index case, representing different rings of secondary infections. Each shell corresponds to a level of exposure risk.

By adjusting sliders for infectiousness and close contacts, users can observe how these factors change the shape and size of the infection rings, providing insights into effective contact tracing strategies.

Why It Matters

Understanding TB transmission dynamics is crucial for developing effective public health policies to control and eliminate tuberculosis. The simulation helps healthcare professionals and policymakers visualize the impact of different intervention strategies.

By simulating various scenarios, users can better understand the importance of early detection and treatment in preventing the spread of TB.

Frequently asked questions

How does the simulation model infectiousness?

Infectiousness is modeled through parameters such as smear-negative/positive/cavitary status, which determine the likelihood of transmission from an index case to close contacts.

What is the significance of secondary LTBI rate in TB contact tracing?

The secondary LTBI rate indicates the probability that individuals will develop active TB after exposure. This helps in assessing the risk and prioritizing interventions for those at higher risk.

How does the golden-spiral point distribution algorithm work?

The algorithm distributes points along a logarithmic spiral to create concentric spherical shells, representing different rings of secondary infections. This ensures an even and realistic representation of infection spread.

Can the simulation be used for other infectious diseases besides TB?

While specifically designed for tuberculosis, the principles behind the simulation can be adapted to model the spread of other infectious diseases with similar transmission dynamics.

Try it live

Everything above runs in your browser — open TB Contact Tracing Investigation Simulator (3D) and change the parameters while it is running. Nothing is installed, nothing is uploaded, the whole model lives in one tab.

▶ Open TB Contact Tracing Investigation Simulator (3D) simulation