2 doctors weighed in:

Can a stomach bacteria be spread through saliva on lips?

2 doctors weighed in
Dr. Robert Ryan
Dentistry

In brief: Yes

Bacteria are plentiful throughout the gastro-intestinal tract the GI tract begins at the lips of the mouth and ends at the anus.
Some of the 'normal flora' of the GI tract can be found throughout the system, some of the bacteria are more regional due to other factors...Ph, oxygen concentration, etc.

In brief: Yes

Bacteria are plentiful throughout the gastro-intestinal tract the GI tract begins at the lips of the mouth and ends at the anus.
Some of the 'normal flora' of the GI tract can be found throughout the system, some of the bacteria are more regional due to other factors...Ph, oxygen concentration, etc.
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Dr. Larry Lutwick
Internal Medicine - Infectious Disease

In brief: Probably

Certainly, helicobacter pylori transmits from person to person and oral-oral transmission likely occurs as one route of spread.

In brief: Probably

Certainly, helicobacter pylori transmits from person to person and oral-oral transmission likely occurs as one route of spread.
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