Study: How glyphosate affects gut bacteria

Recently, a study, called "The Effect of Glyphosate on Potential Pathogens and Beneficial Members of Poultry Microbiota In Vitro", was done on the effects gut bacteria and pathological bacteria when exposed to glyphosate. The study is in Curr Microbiol. The abstract is here. The abstract is also on SpringerLink for free. The full study is paywalled (meaning, you have to pay to see the whole study).

1. Highly pathogenic bacteria highly resistant to glyphosate. 
2. Beneficial bacteria are moderate to highly susceptible to glyphosate exposure. That means one doesn't have to ingest much glyphosate to have a problem.

The abstract:

The use of glyphosate modifies the environment which stresses the living microorganisms. The aim of the present study was to determine the real impact of glyphosate on potential pathogens and beneficial members of poultry microbiota in vitro. The presented results evidence that the highly pathogenic bacteria as Salmonella Entritidis, Salmonella Gallinarum, Salmonella Typhimurium, Clostridium perfringens and Clostridium botulinum are highly resistant to glyphosate. However, most of beneficial bacteria as Enterococcus faecalis, Enterococcus faecium, Bacillus badius, Bifidobacterium adolescentis and Lactobacillus spp. were found to be moderate to highly susceptible. Also Campylobacter spp. were found to be susceptible to glyphosate. A reduction of beneficial bacteria in the gastrointestinal tract microbiota by ingestion of glyphosate could disturb the normal gut bacterial community.

Below is a partial table of the study results on different bacteria.

Sources
Full study as PDF.
Full study online. PDF available.