Peptostreptococcus is a genus of anaerobic, Gram-positive, non-spore forming bacteria that typically occur in short chains, in pairs or individually and move using cilia. They are slow-growing bacteria found in the lower reproductive tract of women that are becoming more resistant to antibiotics. The most common species found in infections are P. magnus, P. asaccharolyticus, P. anaerobius, P. prevotii, P. micros, P. saccharolyticus, and P. intermedius.

1. Firmicutes Class Clostridia
Peptostreptococcus is a genus of anaerobic, Gram-positive, non-
spore forming bacteria. The cells are small, spherical, and can occur
in short chains, in pairs or individually. They typically move using
cilia.Peptostreptococcus are slow-growing bacteria with increasing
resistance to antimicrobial drugs. Peptostreptococcus is a
normal inhabitant of the healthy lower reproductive tract of women.
The most common Peptostreptococcus species found in infections
are P. magnus (18% of all anaerobic gram-positive cocci and
microaerophilic streptococci), P.asaccharolyticus (17%), P
anaerobius (16%), P.prevotii (13%), P.micros (4%), P. saccharolyticus
(3%), and P.intermedius (2%).

2. Firmicutes class clostridia
• Kingdom
• Phylum Firmicutes
• Class Clostridia
• Order Clostridiales
• Family Peptostreptococcaceae
• Genus Peptostreptococcus
• Sepecies magnus

3. Firmicutes class clostridia family Clostridiaceae
• Clostridium and Bacillus are both in the phylum Firmicutes, but they
are in different classes, orders, and families. Microbiologists
distinguish Clostridium from Bacillus by the following features
Clostridium grows in anaerobic conditions; Bacillus grows in aerobic
conditions.
• Clostridium forms bottle-shaped endospores; Bacillus forms oblong
endospores.
• Clostridium does not form the enzyme catalase; Bacillus secretes
catalase to destroy toxic byproducts of oxygen metabolism.
• Clostridium perfringens (gangrene, food poisoning)
• Clostridium difficile (pseudomembranous colitis)
• Clostridium tetani (tetanus)
• Clostridium botulinum (botulism)

4. Firmicutes Class Clostridia family Clostridiaceae
• Kingdom Bacteria
• Phylum Firmicutes
• Class Clostridia
• Order Clostridiales
• Family Clostridiaceae
• Genus Clostridium
• Sepecies magnus