Green or yellow "sputum," as clinicians call it, more often than not reflects a bacterial infection, whereas clear, white or rust colored phlegm most likely does not, according to the new study.

Citation: Yellow bacterial pigment provides new insights into cellulose degradation for biofuels and antibiotics (2025, June 30) ...

Medically reviewed by Andrea L. Braden, MD Medically reviewed by Andrea L. Braden, MD Vaginal discharge is a fluid that leaves your body to keep your vaginal canal healthy. Having discharge is a ...

For over 125 years, we’ve known that a product of this breakdown called urobilin is what makes pee yellow – but the enzyme responsible for its production, which the team behind the study has ...

Yellow tongue usually occurs when bacteria or debris build up on your tongue, but the condition can also be caused by underlying medical conditions.

The bacteria themselves rarely cause discoloration, but yellow isn’t typical for bacteria. Occasionally, medicines can cause sweat to turn a different color. The laxative bisacodyl ...

Without enough saliva, bacteria can grow and turn the roof of your mouth yellow. Other symptoms of dry mouth include bad breath, sticky saliva, and dry throat and tongue. Oral thrush ...