Virginiamycin

Virginiamycin
Combination of
Virginiamycin S1	streptogramin B antibiotic
Pristinamycin IIA	streptogramin A antibiotic
Clinical data
AHFS/Drugs.com	FDA Professional Drug Information
MedlinePlus	a603007
ATC code	D06AX10 ( WHO ) QJ01FG90 ( WHO );
Identifiers
CAS Number	11006-76-1 ;
DrugBank	DB01669 ;
UNII	C49WS9N75L ;
KEGG	D06311 ;
ChEBI	CHEBI:87209 ;
NIAID ChemDB	008734 ;
E number	E711 (antibiotics)
CompTox Dashboard (EPA)	DTXSID30873800 ;
ECHA InfoCard	100.031.119
Chemical and physical data
Melting point	138 to 140 °C (280 to 284 °F) (dec.)
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Last updated December 27, 2025

Virginiamycin is a streptogramin antibiotic similar to pristinamycin and quinupristin/dalfopristin. It is a combination of pristinamycin IIA (virginiamycin M1) and virginiamycin S1.^[1] Virginiamycin is used in the fuel ethanol industry to prevent microbial contamination.^[2] It is also used in agriculture, specifically in livestock, to accelerate the growth of the animals and to prevent and treat infections. ^[3] Antibiotics also save as much as 30% in feed costs among young swine, although the savings fade as pigs get older, according to a USDA study.^[3]

References

↑ Crooy P, De Neys R (June 1972). "Virginiamycin: nomenclature". The Journal of Antibiotics. 25 (6): 371–2. doi: 10.7164/antibiotics.25.371 . PMID 4568014.
↑ "University of Michigan: Resistant Microbes, Antibiotic Abuse, and the Threat to Public Health". Archived from the original on 2008-10-28. Retrieved 2009-03-01.
1 2 Margie Mason; Martha Mendoza (29 December 2009). "Drug-resistant infections lurk in the meat we eat". NBC News. Retrieved December 29, 2009.

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[pmid4568014-1] Crooy P, De Neys R (June 1972). "Virginiamycin: nomenclature". The Journal of Antibiotics. 25 (6): 371–2. doi: 10.7164/antibiotics.25.371 . PMID 4568014.

[2] "University of Michigan: Resistant Microbes, Antibiotic Abuse, and the Threat to Public Health". Archived from the original on 2008-10-28. Retrieved 2009-03-01.

[msnbc-3] 1 2 Margie Mason; Martha Mendoza (29 December 2009). "Drug-resistant infections lurk in the meat we eat". NBC News. Retrieved December 29, 2009.

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