Proteus is a Gram-negative, aerobic, motile rod-shaped bacteria. Size ranges from 0.4-0.8 μm diameter and 1.0-3.0 μm length. Found in decomposing matter, sewage, manure soil, and human feces. First described by Hauser in 1885 from putrefied meat
Gram-positive, coagulase-negative, encapsulated coccus found in oropharyngeal flora. Forms clusters, tetrads or pairs, unlike Micrococcus and Staphylococcus. Strongly adheres to solid medium substrate
Gram-negative bacteria found in intestinal tracts of humans, mammals, and reptiles. Cells are straight rods, 0.6-0.7 μm diameter and 1.0-1.7 μm length. Produces catalase, indole, urease, and methyl red enzymes. Divided into subspecies: subsp. morganii and subsp. sibonii
Serratia is a Gram-negative, rod-shaped bacteria found in various environments. Bacteria are typically 1-5 μm long and do not produce spores. Produces red pigment prodigiosin and unique enzymes DNase, lipase, and gelatinase
Fewer than a hundred pathogenic bacteria exist in humans. Most bacteria are harmless commensals or saprophytes. Pathogenic bacteria can overcome normal body defenses
Penicillium is a green or blue mould fungus with 300 distinct species. Belongs to Ascomycota phylum and Trichocomaceae family. Contains chitin and glucose polysaccharide cell walls. Forms multicellular mycelium with thread-like hyphae