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But some clams make their own erythromycin, a study has found—the first animals reported to possess this ability.

Enzymes in bacteria are used to make an important antibiotic, erythromycin, which was first discovered in 1952.

Instead, both the artificial and natural nests were rich in Pseudonocardiaceae and Streptomycetaceae, bacterial families that produce many common antibiotics, including erythromycin.

The list of ingredients and medicines accounts for 10% of all Indian pharmaceutical exports and includes several antibiotics, such as tinidazole and erythromycin, the hormone progesterone and Vitamin B12.

I'd tried every over-the-counter zit medication known to man, along with harsher prescription creams like Retin-A or pills like erythromycin that were recommended by my dermatologist.