Trueperella pyogenes

{{Short description|Species of bacterium}}

{{Italic title}}

{{Speciesbox

| taxon = Trueperella pyogenes

| authority = (Glage 1903) Yassin et al. 2011{{Citation |vauthors = Yassin AF, Hupfer H, Siering C, ((Schumann P.)) |year=2011 |title=Comparative chemotaxonomic and phylogenetic studies on the genus Arcanobacterium Collins et al. 1982 emend. Lehnen et al. 2006: Proposal for Trueperella gen. nov. and emended description of the genus Arcanobacterium |journal=Int J Syst Evol Microbiol |volume=61 |issue=6 |pages=1265–1274 |pmid=20622055 |doi=10.1099/ijs.0.020032-0}}

| type_strain = ATCC 19411
C-100{{cite web |url=https://lpsn.dsmz.de/genus/trueperella |title=Trueperella |website=LPSN |accessdate=28 February 2015 }}
CCUG 13230
CIP 103129
DSM 20630
LMG 16162
NCTC 5224

| synonyms_ref = {{cite web |url=http://www.vetbact.org/vetbact/?artid=1 |title=Trueperella pyogenes |website=VetBact |accessdate=28 February 2015 }}

| synonyms =

• Actinomyces pyogenes (Glage 1903) Collins and Jones 1983
• Arcanobacterium pyogenes (Glage 1903) Pascual Ramos et al. 1997{{Citation |last1=Pascual Ramos |first1=C |last2=Foster |first2=G|last3=Collins |first3=MD |title=Phylogenetic analysis of the genus Actinomyces based on 16S rRNA gene sequences: Description of Arcanobacterium phocae sp. nov., Arcanobacterium bernardiae comb. nov., and Arcanobacterium pyogenes comb. nov. |journal=International Journal of Systematic Bacteriology |volume=47 |issue=1 |year=1997 |pages=46–53 |issn=0020-7713 |pmid=8995800 |doi=10.1099/00207713-47-1-46 |postscript=.|doi-access=free }}
• Actinomyces pyogenes (Glage 1903) Reddy et al. 1982
• "Bacillus pyogenes" Glage 1903
• Corynebacterium pyogenes (Glage 1903) Eberson 1918 (Approved Lists 1980)

}}

Trueperella pyogenes is a species of nonmotile, facultatively anaerobic, Gram-positive bacteria. The cells typically measure 0.5 by 2.0 μm. They appear as pleomorphic or coccoid rods. They tend to be grouped singly or in short chains but are sometimes grouped into V-shaped pairs.

T. pyogenes is found in the urogenital, gastrointestinal, and upper respiratory tracts of cattle, goats, horses, musk deer, pigs, and sheep, in which it may cause abscesses, mastitis, metritis, and pneumonia.{{cite journal |last1=Machado |first1=Vinicius S. |last2=Bicalho |first2=Rodrigo C. |date=1 May 2014 |title=Complete Genome Sequence of Trueperella pyogenes, an Important Opportunistic Pathogen of Livestock |url= |journal=Genome Announcements |publisher=American Society for Microbiology |volume=2 |issue=2 |doi=10.1128/genomeA.00400-14 |pmid=24786956 |pmc=4007991 }} Although it can thrive in either anaerobic or aerobic environments, it is ideally suited to one with high (about 7%) levels of carbon dioxide.

When the genus Arcanobacterium was split into two (Arcanobacterium and Trueperella gen. nov.), the new genus name was chosen in honor of German microbiologist {{Interlanguage link multi|Hans G. Trüper|de}}. The specific name pyogenes, used in various bacterial genera, was derived from the Greek puon or Latin pyum and suffix -genes, yielding pyogenes, meaning "pus-producing".

Although it can infect a wide variety of tissues, Trueperella pyogenes is the most common cause of "summer mastitis" in cattle and pyometra in dogs {{Citation needed|date=November 2024}}.