Tatumella ptyseos
{{Short description|Species of bacterium}}
{{Speciesbox
| genus = Tatumella
| species = ptyseos
| authority = Hollis et al., 1982
}}
Tatumella ptyseos is a species of Gram-negative bacteria first isolated from human clinical specimens, predominately sputum. It has been isolated from several food sources including powdered infant formula and pineapples.{{cn|date=May 2024}}
The specific epithet comes from the Greek noun ptyseos, which means "a spitting".{{Cite journal |last1=Hollis |first1=D. G. |last2=Hickman |first2=F. W. |last3=Fanning |first3=G. R. |last4=Farmer |first4=J. J. |last5=Weaver |first5=R. E. |last6=Brenner |first6=D. J. |date=Jul 1981 |title=Tatumella ptyseos gen. nov., sp. nov., a member of the family Enterobacteriaceae found in clinical specimens |journal=Journal of Clinical Microbiology |volume=14 |issue=1 |pages=79–88 |doi=10.1128/jcm.14.1.79-88.1981 |issn=0095-1137 |pmc=271905 |pmid=7263854}}
Characteristics
Tatumella ptyseos is catalase positive, oxidase negative, non-encapsulated, and non-spore-forming.{{Cite journal |last1=Farmer |first1=J J |last2=Davis |first2=B R |last3=Hickman-Brenner |first3=F W |last4=McWhorter |first4=A |last5=Huntley-Carter |first5=G P |last6=Asbury |first6=M A |last7=Riddle |first7=C |last8=Wathen-Grady |first8=H G |last9=Elias |first9=C |last10=Fanning |first10=G R |date=Jan 1985 |title=Biochemical identification of new species and biogroups of Enterobacteriaceae isolated from clinical specimens |journal=Journal of Clinical Microbiology |language=en |volume=21 |issue=1 |pages=46–76 |doi=10.1128/jcm.21.1.46-76.1985 |issn=0095-1137 |pmc=271578 |pmid=3881471}} This organism notably produces a large zone of inhibition around penicillin discs. T. ptyseos usually has one flagellum and is motile at room temperature (25 ˚C). It is non-motile at 37 ˚C.
Tatumella ptyseos produces non hemolytic colonies 0.5 to 1.0mm in diameter on blood agar. This organism grows on many kinds of media commonly used to isolate enteric Gram-negative rods such as MacConkey, Tergitol 7, and eosin methylene blue.