Enterococcus faecium: Introduction, Morphology, Pathogenicity, Lab Diagnosis, Treatment, Prevention, and Keynotes

Gram positive cocci in singles, pairs and chains of Enterococcus faecium in Gram staining of culture microscopy

Introduction Enterococcus faecium is a bacterium that belongs to the Enterococcus genus, which is a part of the Firmicutes phylum. It is a Gram-positive, facultative anaerobic coccus, typically occurring in pairs or short chains. Enterococci are commensal bacteria commonly found in the gastrointestinal tract of …

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Candida krusei: Introduction, Morphology, Pathogenicity, Lab Diagnosis, Treatment, Prevention, and Keynotes

Colony morphology of Candida krusei on SDA plate

Introduction Candida krusei is a species of yeast that belongs to the Candida genus. It is an opportunistic fungal pathogen known to cause infections in humans, particularly those with compromised immune systems or underlying medical conditions. C. krusei is an important member of the Candida …

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Candida tropicalis: Introduction, Morphology, Pathogenicity, Lab Diagnosis, Treatment, Prevention, and Keynotes

Various Candida species grew on Candida CHROMAgar -Candida albicans (green), Candida tropicalis (cream-colored to light pink colonies), Candida glabrata (purple to lavender-color), Candida krusei(dark blue to mauve colonies), and Candida parapsilosis (cream-colored) as shown in the figure.

Introduction Candida tropicalis is a species of yeast, belonging to the Candida genus, commonly found in the environment and on the human body as part of the normal microbial flora. Similar to other Candida species, it can exist as a commensal organism, coexisting harmlessly with …

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Candida glabrata: Introduction, Morphology, Pathogenicity, Lab Diagnosis, Treatment, Prevention, and Keynotes

Yeast cells and hyphae of Candida glabrata in Giemsa stained smear of sputum microscopy at a magnification of 1000X

Introduction Candida glabrata is a species of yeast, specifically a type of fungus, that belongs to the Candida genus. It is commonly found in the environment and is also part of the normal microbial flora on the skin and mucous membranes of humans. While it …

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Haemophilus influenzae: Introduction, Morphology, Pathogenicity, Lab Diagnosis, Treatment, Prevention, and Keynotes

Introduction Haemophilus influenzae is a Gram-negative bacterium that was originally believed to be the causative agent of influenza (the flu). However, it was later discovered that H. influenzae is not related to the viral infection that causes influenza. Instead, this bacterium is known for causing …

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E. cloacae: Introduction, Morphology, Pathogenicity, Lab Diagnosis, Treatment, Prevention, and Keynotes

E. cloacae mucoid growth on CLED agar of Urine Culture

Introduction Enterobacter cloacae is a Gram-negative bacterium belonging to the Enterobacteriaceae family. It is a non-motile, facultative anaerobic, rod-shaped bacterium with a characteristic ability to ferment lactose. The name “cloacae” is derived from the Latin word “cloaca,” which means sewer or drain, indicating the bacterium’s …

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Pseudomonas aeruginosa: Introduction, Morphology, Pathogenicity, Lab Diagnosis, Treatment, Prevention, and Keynotes

Pseudomonas aeruginosa non-lactose fermenting (NLF) colony and mucoid lactose fermenting colony of Klebsiella pneumoniae on MacConkey medium

Introduction Pseudomonas aeruginosa is a Gram-negative bacterium that is widely distributed in nature and is known for its versatility and adaptability. It is an opportunistic pathogen capable of causing infections in humans, particularly in individuals with weakened immune systems or underlying medical conditions. P. aeruginosa …

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Quorum Sensing: Introduction, Its Role in Virulence, and Possibilities for Its Control, and Keynotes

Another organism responsible for quorum sensing- Staphylococcus aureus and its growth on blood agar of clinical specimen, pus

Introduction Quorum sensing (QS) is a sophisticated cell-to-cell communication system used by bacteria to coordinate group behaviors based on the population density. It enables bacterial cells to communicate and synchronize their activities by detecting and responding to small signaling molecules called autoinducers. In quorum sensing, …

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