MSSA

MSSA may refer to

Methicillin-sensitive Staphylococcus aureus, a kind of bacteria
MSSA Chemical company, a French chemical company, also known as Métaux Spéciaux
Military-style semi-automatic, a firearm (abbreviation commonly used in New Zealand)
Member of the Order of the Star of South Africa
The Montessori School of San Antonio, a montessori school in San Antonio, Texas

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