Escherichia coli belongs to the Enterobacteriaceae family [1] and is a notable member of normal microbial flora [2]. It is not only the most frequently detected gram-negative rod in septic patients but also a leading cause of community-acquired urinary tract...
Staining and Microbiologic Features: C. Jejuni is an S-shaped rod that is non-spore forming and exhibits gram-negative staining [1]. C. Jejuni flourishes in an environment with lowered oxygen levels (5-7%) and heightened carbon dioxide levels (5-10%), with optimal...
Some important Vibrio species include Vibrio cholerae, Vibrio parahaemolyticus, and Vibrio vulnificus. Vibrio Cholerae Staining and Microbiologic Features: Comma-shaped rods that exhibit gram-negative staining [1] ff vibrio" by isis325 is licensed under CC BY 2.0....
Neisseria meningitidis, commonly known as meningococcus, can colonize the mucous membranes of the nasopharynx in healthy individuals, where it may exist harmlessly without any signs or symptoms. However, under certain conditions, this bacterium can lead to potentially...
Neisseria gonorrhoeae is responsible for causing one of the most frequent sexually transmitted diseases known as gonorrhea. Unlike N.meningitidis, the presence of N. gonorrhoeae in a specimen is always of clinical importance [1]. Its exclusive natural host is humans,...
Some species of Shigella include Shigella dysenteriae, Shigella flexneri, Shigella boydii, and Shigella sonnei. Shigella sonnei is responsible for most Shigella infections in the United States. S. flexneri's prevalence shifts geographically, with a higher burden noted...
Staining and Microbiologic Features: A gram-negative rod that is a facultative anaerobe [1] File:Salmonella Typhimurium Gram.jpg" by Y tambe is licensed under CC BY-SA 3.0 Its exclusive reservoir is humans [2]. S. typhi is a non lactose fermenting organism and...
Serratia Marcescen Stainig and Microbiologic Features: Serratia is a gram-negative rod that belongs to the Enterobacteriaceae family [1]. Serratia is a motile pathogen and tests positive for catalase [2]. Some strains produce a red pigment called prodigiosin [3]....
Proteus Mirabilis According to Greek mythology, Proteus was an ancient sea god known for his ability to change its shape. This reference reflects the bacterial ability to form pleomorphic colonies [1]. "Mirabilis" is a Latin word meaning "wonderful" or "miraculous,"...
Staining and Microbiologic Features: Gram-negative bacilli [1] It requires Factor X (hemin) for its growth [2] Factor V (NAD) is not necessary for its growth [1] . H. influenzae requires both factor V (NAD) and Factor X (hemin) for its growth and metabolic...
