Worksheetspost test mikro 2.3
Total questions: 10
Worksheet time: 5mins
In the human eye area there is a microbiota—microorganisms that colonize body surfaces without causing infection in healthy individuals. Which microorganism is NOT part of the normal microbiota of a healthy eye?
Streptococcus viridans
Propionibacterium sp.
Corynebacterium sp.
Neisseria gonorrhoeae
Staphylococcus epidermidis
Ocular infections are anatomically categorized as external ocular infections and internal ocular infections. Which set consists of external ocular infections?
Dacryoadenitis, Conjunctivitis, Keratitis, Endophthalmitis
Blepharitis, Conjunctivitis, Dacryoadenitis, Orbital cellulitis
Dacryoadenitis, Blepharitis, Keratoconjunctivitis, Uveitis
Conjunctivitis, Keratitis, Orbital abscess, Panophthalmitis
Blepharitis, Uveitis, Chalazion, Canaliculitis
Conjunctivitis, often called “pink eye,” is inflammation of the conjunctiva and may be caused by bacteria, viruses, fungi, or parasites. Which microorganism most commonly causes conjunctivitis?
Varicella-Zoster virus
Adenovirus
Staphylococcus aureus
Herpes simplex virus
Neisseria gonorrhoeae
Epidemic keratoconjunctivitis (EKC) is a clinical manifestation of viral eye infection. Which statement about EKC is most accurate?
It is the most common clinical manifestation of adenoviral conjunctivitis.
It is caused by Herpes simplex virus and represents a combination of conjunctivitis and keratitis.
It is the most severe clinical manifestation of adenoviral conjunctivitis, presenting as conjunctivitis accompanied by keratitis.
It is acute follicular conjunctivitis with upper respiratory tract infection caused by Varicella-Zoster virus.
It is caused by Cytomegalovirus and represents a combination of conjunctivitis and keratitis.
A 60-year-old man presents with a sudden red right eye that looks hemorrhagic, tearing, pain, and foreign-body sensation. He reports no visual disturbance. He visited a friend with an eye illness one day earlier. Based on the appearance of the eye and the clinical scenario, what is the most likely diagnosis?
Acute follicular conjunctivitis
Epidemic keratoconjunctivitis
Acute bacterial conjunctivitis
Hyperacute bacterial conjunctivitis
Acute hemorrhagic conjunctivitis (AHC)
In acute bacterial conjunctivitis, which bacteria are most frequently responsible?
Staphylococcus aureus, Streptococcus pneumoniae, and Haemophilus influenzae
Staphylococcus aureus, Streptococcus pneumoniae, and Neisseria gonorrhoeae
Streptococcus pneumoniae, Haemophilus influenzae, and Escherichia coli
Haemophilus influenzae, Corynebacterium spp., and Pseudomonas aeruginosa
Streptococcus pneumoniae, Neisseria gonorrhoeae, and Pseudomonas aeruginosa
A 65-year-old woman develops a red, painful left eye with worsening vision one day after an uncomplicated cataract surgery. What is the most likely diagnosis?
Postinjection endophthalmitis
Acute post–cataract endophthalmitis
Endogenous bacterial endophthalmitis
Uveitis
Bacterial keratitis
A 10-day-old infant presents with red eyes for 2 days, mucoid secretion at the inner canthus, and continuous tearing. The baby was born at term via vaginal delivery. What is the most appropriate diagnosis?
Acute bacterial conjunctivitis
Allergic conjunctivitis
Neonatal conjunctivitis (ophthalmia neonatorum)
Nasolacrimal duct obstruction
Chemical conjunctivitis in adults
What is the primary role of bacterial toxins or specific adhesins in the pathogenesis of bacterial conjunctivitis?
Facilitating adherence to the conjunctival epithelium, enabling colonization and subsequent inflammation
Promoting viral replication within the corneal stroma
Increasing tear production by stimulating lacrimal gland secretion
Enhancing phototransduction in retinal cells
Not all eye infections require microbiological testing. Definitive diagnosis is based on history and physical examination, with microbiology and other laboratory tests used as support. Which statement about microbiological specimens in eye infections is most accurate?
In conjunctivitis, specimens are conjunctival swabs and pus from the conjunctiva, which can be collected by a general practitioner
In bacterial keratitis, specimens are corneal swabs that can be collected by a general practitioner
In bacterial keratitis, specimens are corneal swabs that should be collected by an ophthalmology specialist
In bacterial endophthalmitis, specimens are conjunctival swabs and pus from the conjunctiva, collected by an ophthalmology specialist
In bacterial endophthalmitis, specimens are aspiration of vitreous fluid, which can be collected by a general practitioner
