peptostreptococcus

Peptostreptococcus 2017, Dr.Babiker Saad Almugadam Yousif, University of El Imam El Mahdi, Kosti city, Sudan

1. Genus
Peptostreptococcus
Almugadam B Saad
Lecturer of medical microbiology
Faculty of medical laboratory sciences
Full name
BabikerSaadAlmugadamYousifFaculty of medical laboratory sciences
University of El Imam El Mahadi
Kosti-Sudan
MScUniversity of Khartoum
BScUniversity of El Imam El Mahadi
BabikerSaadAlmugadamYousif

2. Genus Peptostreptococcus
1-Importantproperties,M.Important
With the end of this topic , You
should know the following:
Learning
objectives
species,Pathogenesis,Labdiagnosis,and
drugsofchoiceforPeptostreptococcus
2-Howtodifferentiatebetweenthe
speciesofPeptostreptococcus

3. Scientific classification
Domain: Bacteria
Phylum: Firmicutes
Class: Clostridia
Order: Clostridiales
Family: Clostridiaceae
Genus: Peptostreptococcus
Medical Important Species
(Most frequently isolates)
P. Magnus , P.asaccharolyticus, P anaerobius, P.prevotii, P.micros
Peptostreptococcussaccharolyticus, and Peptostreptococcusintermedius.

4. -Gram+ve cocci arrange in short
chain , pairs or individually , Non
sporing , STRICT ANAEROBIC ,
General Characters of
Peptostreptococcus
Catalase Negative .
-Members of Gram positive
anaerobic cocci(GPAC).

5. Pathogenesis
of Peptostreptococcus
-Virulence Factors :??????????????
-Diseases :
causebrain,liver,breast,and
lungabscesses,aswellas
generalizedNecrotizingsoftgeneralizedNecrotizingsoft
tissueinfections.
Theyparticipateinmixed
anaerobicinfections.

6. Laboratory diagnosis
-Specimen: depend on
the type and site of
infection.
-Microscopy : Gram positive
cocci, arrange in short
chain or pair .chain or pair .
-Culture: Done in fastidious
anaerobic agar or blood agar
anaerobic. Anaerobiccondit-
ion can provide by anaerobic
jar.

7. Selective Media :
Anaerobic PEA or Anaerobic CNA
-Differentiation from Streptococci and Staphylococci ???????
-Identification and differentiation of Streptococci : Base on
-Colonial Morphology and staining reaction ?
-Biochemical reaction and Antibiotic susceptibility
Baird barker agar

8. Treatment
-Peptostreptococcusspecies Sensitive to Beta-lactamantibiotics.
.