Method and system for analyzing intestinal microflora of a subject

1 . A method for analyzing intestinal microflora of a subject, comprising:

receiving, by one or more processors, a digital image of a sample of feces of the subject;

providing the digital image and/or one or more features extracted from the digital image as input to a trained machine learning model which is configured to output a classification based on said input digital image and/or one or more features extracted from the digital image; and

determining, by the one or more processors, data indicative of one or more properties of the intestinal microflora of the subject based on the output image classification,

wherein the machine learning model has been trained using a data set comprising a plurality of digital images of fecal samples, and

wherein each digital image of a fecal sample, of the plurality of digital images of fecal samples, is accompanied by microbial data representative of abundances of predetermined microbial enterotype, species or genera in the fecal sample in the digital image.

2 . The method of claim 1 , wherein the digital image is an image of a fecal streak on a substrate.

3 . The method of claim 2 , wherein the fecal streak is obtained by smearing a layer of feces on the substrate.

4 . The method of claim 3 , wherein the substrate is a sheet of paper.

5 . The method of claim 2 , wherein the substrate and/or an area covered by the fecal streak have dimensions falling within a predetermined range.

6 . The method of claim 1 , wherein the digital image is a macroscopic digital image.

7 . The method of claim 6 , wherein the macroscopic digital image has a field of view of at least 30×30 mm.

8 . The method of claim 1 , wherein the image classification is associated to abundances of predetermined microbial species, genera and other phylogenetic information.

9 . The method of claim 8 , wherein the predetermined microbial genera include one or more microbial enterotypes or microbial abundance profiles.

10 . The method of claim 9 , including determining, based on the output image classification, relative abundances of the one or more predetermined microbial enterotypes, species or genera.

11 . The method of claim 8 , wherein the predetermined microbial genera include one or more pathogenic microbial enterotypes or microbial abundance profiles.

12 . The method of claim 8 , including determining, based on the output image classification, microbial diversity.

13 . The method of claim 1 , including determining a personalized nutrition based on the determined data indicative of the one or more properties of the intestinal microflora of the subject.

14 . The method of claim 1 , wherein the digital image of the sample of feces is obtained under white light illumination.

15 . The method of claim 1 , wherein the digital image of the sample of feces is obtained under narrow band illumination.

16 . The method of claim 1 , wherein the digital image of the sample of feces is obtained under autofluorescence excitation illumination.

17 . The method of claim 1 , wherein the data includes sequencing data corresponding to the fecal sample in the digital image.

18 . The method of claim 1 , wherein the data accompanying each digital image is statistically normalized to a predetermined total abundance of the predetermined microbial genera.

19 . A method of determining an indication of a subject's health based on data indicative of one or more properties of the intestinal microflora of the subject determined according to claim 1 .

20 . The method according to claim 19 , wherein the digital image of the sample of feces of the subject is taken by means of a mobile device and uploaded to a server, wherein the server is configured to carry out the determining data indicative of one or more properties of the intestinal microflora of the subject based on the output image classification.

21 . A method for training a machine learning model for analyzing intestinal microflora of a subject with digital images of fecal samples, the method including:

a) receiving a data set comprising a plurality of digital images of fecal samples;

b) receiving data representative of abundances of predetermined microbial enterotype, species or genera in the fecal sample in each digital image of the plurality of digital images; and

c) training the machine learning data processing model based on the data received in step b) and the digital images received in step a) for enabling, after completing the training, automatically associating abundances of the predetermined microbial enterotype, species, or genera with digital images of fecal samples.

22 . A system for analyzing intestinal microflora of a subject, the system comprising:

one or more processors for receiving a digital image of a sample of feces of the subject; and

a memory storing a trained machine learning model, wherein the trained machine learning model is configured to output a classification based on the digital image and/or one or more features extracted from the digital image provided as input,

wherein the machine learning model has been trained using a data set comprising a plurality of digital images of fecal samples,

wherein each digital image of a fecal sample, of the plurality of digital images of fecal samples, is accompanied by microbial data representative of abundances of predetermined microbial enterotype, species or genera in the fecal sample in the digital image; and

wherein the one or more processors are configured to determine data indicative of one or more properties of the intestinal microflora of the subject based on the output image classification.

23 . The system of claim 22 , wherein the data accompanying each digital image is statistically normalized to a predetermined total abundance of the predetermined microbial genera.