Method, computer program product, analysis device, and system for identifying and localizing an unhealthy gut state in a gastrointestinal tract

An analysis device for identifying and localizing an unhealthy gut state in a gastrointestinal tract, said analysis device comprising a processing unit configured to:

• receiving a first time series of first data representing an unhealthy gut biomarker level and a second time series of second data representing pH, wherein the first time series of first data and the second time series of second data are acquired by a sensor device while the sensor device passes through the gastrointestinal tract;
• identifying a first time point of a transition from a first part of the gastrointestinal tract to a second part of the gastrointestinal tract based on a change in value of at least one of the first data in the first time series or the second data in the second time series;
• analyzing at least one of the first time series of first data or the second time series of second data, for identifying occurrence of unhealthy gut state;
• and
• on a condition that an occurrence of the unhealthy gut state is identified:
• determining a second time point of the occurrence of the unhealthy gut state;
• and
• determining a location, along the gastrointestinal tract, of the occurrence of the unhealthy gut state based on the first time point and the second time point.