Burkholderia pseudomallei: Properties, Lab Diagnosis
Burkholderia pseudomallei: Properties, Lab Diagnosis
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Gram-Negative Rods
Enterobacteriaceae family as well as Pseudomonas, Acinetobacter and related organisms
Acinetobacter: Disease, Properties, Resistance
Acinetobacter: Disease, Properties, Resistance
Helicobacter pylori: Properties, Pathogenesis, Virulence Factors, Diagnosis, and Treatment
Helicobacter pylori infects half the world's population and causes peptic ulcer disease and gastric cancer. Learn its properties (spiral GN rod, microaerophilic, urease-positive),...
Vibrio Cholerae: Characteristics, Pathogenesis, and Lab Diagnosis
How to confirm Vibrio cholerae from a diarrheal outbreak: TCBS culture, string test vs Aeromonas, serotyping O1/O139, and ORS-first treatment.
Catalase Test: The 3-Second Test That Separates Staph from Strep, and Five Ways It Lies
Bubbles in 3 seconds means Staphylococcus. But red blood cells bubble, nichrome loops bubble, and enterococci grown on blood agar bubble weakly. Learn what the catalase test actual...
Campylobacter Jejuni: Disease, Properties, Lab Diagnosis
Campylobacter Jejuni: Disease, Properties, Lab Diagnosis
Biochemical Tests Used to Identify Bacteria in the Microbiology Laboratory
A complete guide to biochemical tests used in bacterial identification — 40+ tests organised by category with principle, positive result, and organisms identified. Includes IMViC,...
Oxidase Test: Purple in 10 Seconds, Delayed, or a False Negative?
Purple in 10 seconds is positive. Purple at 90 seconds means something else. No color at all from a TCBS or MacConkey plate often means the test failed, not that the organism is ne...
Pseudomonas aeruginosa: Properties, Virulence Factors, Lab Diagnosis, and Antibiotic Resistance
Pseudomonas aeruginosa is a WHO Priority 1 critical pathogen causing HAP, VAP, burn wound infections, and cystic fibrosis lung disease. Learn its virulence factors (exotoxin A, T3S...