Lactobacillus (long, narrow Gram-positive rods) on an epithelial cell from a vaginal wet prep that was Gram-stained; This is a sign of healthy, vaginal flora and healthy vaginal epithelial cells
Lactobacillus on blood agar (alpha-hemolytic)
Listeria monocytogenes
Listeria monocytogenes-Gram-positive rod that is motile and exhibits characteristic "tumbling motility" and "umbrella" motility pattern in motility agar and is the third most common causative agent of neonatal meningitis after Group B streptococci and E. coli.
Listeria monocytogenes (bile esculin positive)
Corynebacterium-"Chinese Letters" morphology
Corynebacterium ulcerans
Lactobacillus on blood agar (alpha hemolytic)
Listeria monocytogenes on bile esculin agar (bile esculin positive)
Proprionibacterium acnes-Often a skin contaminant
Corynebacterium diptheriae-"Chinese Letters" or "drumstick" morphology (diptheria, pseudomembrane formation over the pharynx)
Mobiluncus (stains Gram-variable, but has a Gram-positive cell wall)
Erysipelothrix spp
gram-positive, spore-forming bacilli (rods)
Bacillus cereus, spore-forming Gram-positive bacilli, are implicated in food poisoning, such as rice that has sat out for too long;By Hanna Sörensson from Karlstad, Sweden - Bacillus cereus, CC BY-SA 2.0, https://commons.wikimedia.org/w/index.php?curid=40046917
Bacillus cereus on blood agar;By Photo Credit:Content Providers(s): CDC/ Courtesy of Larry Stauffer, Oregon State Public Health Laboratory - This media comes from the Centers for Disease Control and Prevention's Public Health Image Library (PHIL), with identification number #1924.Note: Not all PHIL images are public domain; be sure to check copyright status and credit authors and content providers.English | Slovenščina | +/−Originally from en.wikipedia; description page is/was here., Public Domain, https://commons.wikimedia.org/w/index.php?curid=1859513
Bacillus spp
Bacillus spp
Bacillus cereus (food poisoning, gastroenteritis, ocular infections, catheter-related sepsis), a motile, non-encapsulated spore-former resistant to penicillin
Bacillus cereus
Clostridium tetani causes tetanus, which follows a puncture wound by a rusty nail or by skin trauma with any type of object contaminated with its spores, which are commonly found in the soil and in animal feces. It produces the exotoxin tetanospasmin, which results in tetany. It also causes "lockjaw".
C. tetani
These two species are both pathogens, and cause disease by releasing potent exotoxins. Bacillus is an aerobe, whereas Clostridium is an anaerobe.
Bacillus subtilis (opportunistic infections)
Bacillus subtilis
Clostridium perfringens (gas gangrene, soft tissue infections such as cellulitis and fasciitis, food poisoning, necrotic enteritis, sepsis)