Clinical Microbiology & Infectious Disease Exam 4 Part 2 : Gram-Positive &
Gram-Negative Bacteria, Catalase & Coagulase Reactions, Streptococci &
Staphylococci Differentiation, Beta/Alpha/Gamma Hemolysis, Enterococcus &
Lancefield Grouping, Neisseria Oxidase & Carbohydrate Profiles, Bacillus &
Clostridium Pathophysiology, Toxin-Mediated Diseases, Foodborne Intoxications,
Viral Pathogens (Rabies, Influenza, RSV, Coronavirus, Zika, Dengue, Rotavirus,
HMPV, Ebola), Mycobacterial Acid-Fast Infections, Mycobacterium Tuberculosis
& MAC, Fungal Pathogens (Aspergillus, Histoplasma, Pneumocystis), Parasites
(Plasmodium Falciparum), Tick-Borne Spirochaetes (Borrelia, Rickettsia,
Ehrlichia), Host Immune Responses, Antibiotic Resistance Mechanisms (MRSA,
Penicillinase), Vaccine Principles, Biofilm Formation, Laboratory Diagnostics
(Gram Stain, Optochin, Bile Solubility, TSI, Culture Media, Autoclaving, RFLP),
Molecular Mechanisms (Point Mutation, Missense, Frameshift, Transduction,
Conjugation, Transformation), Epidemiology Terms (Endemic, Pandemic,
Nosocomial, Reservoirs, Vectors, SIRS, Sepsis, Toxic Shock) Exam Questions
Verified and Provided with Complete A+ Graded Rationales Latest Updated 2026
A "rice water stool" is a characteristic of patients infected with
Vibrio cholera
A sample of material from bluish purulent head lesions is submitted for analysis. A gram
negative, motile, non-sporeforming oxidase positive rod was isolated.
, Pseudomonas Aeruginosa
A gram stained smear from a genital soft chance demonstrated small gram negative rods
arranged in tangled chains. You would suspect the cause of the chancroid to be
Hemophilus ducreyi
Organisms of this genus are gram negative, motile rods. A few are chromogenic and produce a
red non-water soluble pigment. Some have been implicated in septicemia, pulmonary are
urinary tract infections. One member of this genus is
Serratia marcescens
Which characteristic is most useful in differentiating Citrobacter and Salmonella
Lysine decarboxylase
A gram stain from a sputum specimen demonstrates many gram positive cocci in chains and
pairs. Numerous small alpha streptococci are observed on the primary blood agar plate. To
determine if these organisms are streptococcus pneumonia what test should be performed?
Optochin Susceptibility
Loeffler's medium is used as a primary isolation medium for
Corynebacterium diphteriae
Gram-Negative Bacteria, Catalase & Coagulase Reactions, Streptococci &
Staphylococci Differentiation, Beta/Alpha/Gamma Hemolysis, Enterococcus &
Lancefield Grouping, Neisseria Oxidase & Carbohydrate Profiles, Bacillus &
Clostridium Pathophysiology, Toxin-Mediated Diseases, Foodborne Intoxications,
Viral Pathogens (Rabies, Influenza, RSV, Coronavirus, Zika, Dengue, Rotavirus,
HMPV, Ebola), Mycobacterial Acid-Fast Infections, Mycobacterium Tuberculosis
& MAC, Fungal Pathogens (Aspergillus, Histoplasma, Pneumocystis), Parasites
(Plasmodium Falciparum), Tick-Borne Spirochaetes (Borrelia, Rickettsia,
Ehrlichia), Host Immune Responses, Antibiotic Resistance Mechanisms (MRSA,
Penicillinase), Vaccine Principles, Biofilm Formation, Laboratory Diagnostics
(Gram Stain, Optochin, Bile Solubility, TSI, Culture Media, Autoclaving, RFLP),
Molecular Mechanisms (Point Mutation, Missense, Frameshift, Transduction,
Conjugation, Transformation), Epidemiology Terms (Endemic, Pandemic,
Nosocomial, Reservoirs, Vectors, SIRS, Sepsis, Toxic Shock) Exam Questions
Verified and Provided with Complete A+ Graded Rationales Latest Updated 2026
A "rice water stool" is a characteristic of patients infected with
Vibrio cholera
A sample of material from bluish purulent head lesions is submitted for analysis. A gram
negative, motile, non-sporeforming oxidase positive rod was isolated.
, Pseudomonas Aeruginosa
A gram stained smear from a genital soft chance demonstrated small gram negative rods
arranged in tangled chains. You would suspect the cause of the chancroid to be
Hemophilus ducreyi
Organisms of this genus are gram negative, motile rods. A few are chromogenic and produce a
red non-water soluble pigment. Some have been implicated in septicemia, pulmonary are
urinary tract infections. One member of this genus is
Serratia marcescens
Which characteristic is most useful in differentiating Citrobacter and Salmonella
Lysine decarboxylase
A gram stain from a sputum specimen demonstrates many gram positive cocci in chains and
pairs. Numerous small alpha streptococci are observed on the primary blood agar plate. To
determine if these organisms are streptococcus pneumonia what test should be performed?
Optochin Susceptibility
Loeffler's medium is used as a primary isolation medium for
Corynebacterium diphteriae
