Conjunctivitis: Allergic Indian Medical PG Practice Questions and MCQs
Practice Indian Medical PG questions for Conjunctivitis: Allergic. These multiple choice questions (MCQs) cover important concepts and help you prepare for your exams.
Conjunctivitis: Allergic Indian Medical PG Question 1: Which of the following findings is typically NOT seen in a patient with allergic conjunctivitis?
- A. Watery discharge
- B. Itching
- C. Bilateral eye redness
- D. Purulent discharge (Correct Answer)
Conjunctivitis: Allergic Explanation: ***Purulent discharge***
- **Purulent discharge** (thick, yellowish, or greenish) is characteristic of **bacterial conjunctivitis** and is usually absent in allergic conjunctivitis.
- Allergic conjunctivitis typically presents with a **clear or watery discharge**.
*Watery discharge*
- **Watery discharge** is a very common symptom of **allergic conjunctivitis**, often accompanied by itching and redness.
- It results from the inflammatory response and increased lacrimation due to allergen exposure.
*Itching*
- **Ocular itching** is the hallmark symptom of allergic conjunctivitis and is considered its most distinctive feature.
- It is caused by the release of **histamine** and other inflammatory mediators from mast cells in response to allergens.
*Bilateral eye redness*
- **Bilateral conjunctival redness** (hyperemia) is a frequent finding in allergic conjunctivitis.
- This is due to **vasodilation** in response to the inflammatory process affecting both eyes, as airborne allergens often affect both simultaneously.
Conjunctivitis: Allergic Indian Medical PG Question 2: A 12-year-old boy presents with recurrent attacks of conjunctivitis for the last 2 years, characterized by intense itching and ropy discharge. The diagnosis is likely to be:
- A. Vernal conjunctivitis (Correct Answer)
- B. Viral conjunctivitis
- C. Phlyctenular conjunctivitis
- D. Trachoma
Conjunctivitis: Allergic Explanation: ***Vernal conjunctivitis***
- **Vernal keratoconjunctivitis (VKC)**, commonly called **vernal conjunctivitis**, is a chronic, bilateral inflammation of the conjunctiva, most common in young boys, characterized by intense itching and thick, **ropy discharge**.
- It is a **type 1 hypersensitivity reaction** and often exhibits seasonal recurrence, improving in colder months, which aligns with the "recurrent attacks for the last 2 years" given the patient's age.
*Phlyctenular conjunctivitis*
- **Phlyctenular conjunctivitis** is characterized by the formation of small, raised nodules (**phlyctenules**) on the conjunctiva or cornea, often associated with a delayed hypersensitivity response to bacterial antigens like **tuberculosis** or **Staphylococcus**.
- It typically presents with **irritation**, **photophobia**, and **lacrimation**, but not the ropy discharge or predominant severe itching seen in this boy.
*Viral conjunctivitis*
- **Viral conjunctivitis** is highly contagious and often presents with **redness**, **watery discharge**, and sometimes an associated **upper respiratory infection**.
- While it can cause itching and redness, the discharge is typically watery, not ropy, and the long-term recurrent nature with ropy discharge is less characteristic of viral etiologies.
*Trachoma*
- **Trachoma**, caused by **Chlamydia trachomatis**, is a chronic infectious eye disease leading to inflammation, follicular conjunctivitis, and ultimately scarring that can cause **blindness**.
- It is prevalent in developing countries and typically presents with a mucopurulent discharge and characteristic follicles, but the intense itching and ropy discharge in a 12-year-old in a recurrent pattern are not its primary defining features.
Conjunctivitis: Allergic Indian Medical PG Question 3: Features of vernal conjunctivitis are:
- A. Papillary hypertrophy
- B. Horner-Trantas spots
- C. Shield ulcer
- D. All of the options (Correct Answer)
Conjunctivitis: Allergic Explanation: ***All of the options***
- **Vernal conjunctivitis (VKC)** is a severe form of allergic conjunctivitis characterized by chronic inflammation of the conjunctiva, impacting the cornea in advanced stages.
- **Shield ulcers**, **Horner-Trantas dots**, and **papillary hypertrophy** are all classic clinical features observed in VKC.
*Shield ulcer*
- This is a **corneal complication** of severe vernal conjunctivitis, characterized by epithelial defects that can lead to significant pain and vision impairment.
- It develops due to corneal abrasion from the giant papillae on the upper tarsal conjunctiva and direct corneal toxicity from inflammatory mediators.
*Horner-Trantas spots*
- These are **gelatinous aggregations** of epithelial cells and eosinophils that appear as white dots at the limbus, particularly evident at the superior limbus.
- They are one of the **pathognomonic signs** of vernal conjunctivitis, indicating significant allergic inflammation.
*Papillary hypertrophy*
- Characterized by the development of **large, flattened papillae** (often described as "cobblestone" papillae) on the upper tarsal conjunctiva.
- This hypertrophy is a result of chronic inflammation and proliferation of mast cells, eosinophils, and lymphocytes in the conjunctival stroma.
Conjunctivitis: Allergic Indian Medical PG Question 4: Ramu, a 10-year-old patient, presents with itching in his eye, foreign body sensation, and ropy discharge since several months, with symptoms more prominent in summer. What is the most probable diagnosis?
- A. Vernal conjunctivitis (Correct Answer)
- B. Fungal keratoconjunctivitis
- C. Viral conjunctivitis
- D. Trachoma
Conjunctivitis: Allergic Explanation: ***Vernal conjunctivitis***
- **Vernal conjunctivitis** (or allergic conjunctivitis) is characterized by **itching**, foreign body sensation, and a **ropy, tenacious discharge**, which are all present in Ramu's case.
- The symptoms are typically **seasonal**, often worsening during warmer months (summer), matching the patient's presentation.
*Fungal keratoconjunctivitis*
- This condition often presents with a history of **ocular trauma** involving vegetable matter or contact lens use, which is not mentioned here.
- Clinical signs typically include a **corneal ulcer**, often with feathery margins and satellite lesions, alongside eye discomfort, rather than predominantly ropy discharge and itching.
*Viral conjunctivitis*
- Viral conjunctivitis typically presents with **watery discharge**, conjunctival hyperemia, and often a history of an **upper respiratory tract infection**.
- While it can cause foreign body sensation and redness, the prominent **ropiness of the discharge** and **seasonal recurrence** described are less characteristic of viral etiology.
*Trachoma*
- Trachoma is a chronic infectious eye disease caused by *Chlamydia trachomatis*, leading to severe scarring of the conjunctiva and can cause blindness.
- It is often associated with poor hygiene and crowded living conditions, and typically presents with **conjunctival scarring**, **trichiasis**, and potentially corneal opacities, which differ from Ramu's chronic allergic presentation.
Conjunctivitis: Allergic Indian Medical PG Question 5: Which of the following is a feature of vernal keratoconjunctivitis?
- A. Follicular hypertrophy
- B. Papillary hypertrophy (Correct Answer)
- C. Pseudomembrane formation
- D. Membrane formation
Conjunctivitis: Allergic Explanation: ***Papillary hypertrophy***
- This is a hallmark feature of **vernal keratoconjunctivitis (VKC)**, particularly the presence of large, **cobblestone papillae** on the upper tarsal conjunctiva.
- The papillary reaction is due to inflammation and infiltration of the conjunctival stroma with lymphocytes, plasma cells, and eosinophils, leading to raised bumps.
- VKC is a chronic, bilateral allergic condition typically affecting children and young adults, with seasonal exacerbations.
*Follicular hypertrophy*
- **Follicular hypertrophy** is characterized by dome-shaped, avascular elevations formed by hyperplasia of lymphoid tissue, commonly seen in **viral conjunctivitis** and **chlamydial conjunctivitis**.
- It is not typically seen in VKC, which is an allergic condition with a papillary rather than follicular response.
*Pseudomembrane formation*
- **Pseudomembrane formation** is a coagulum of inflammatory exudates and necrotic epithelial cells that loosely adheres to the conjunctiva and can be peeled off without bleeding, often seen in severe **adenoviral conjunctivitis**.
- This feature is not characteristic of vernal keratoconjunctivitis.
*Membrane formation*
- **True membrane formation** involves a fibrinous exudate that is firmly adherent to the conjunctiva, and removal causes bleeding. It is seen in **bacterial conjunctivitis** (particularly diphtheria) and **Stevens-Johnson syndrome**.
- Unlike papillary hypertrophy in VKC, membrane formation represents severe inflammatory or infectious processes.
Conjunctivitis: Allergic Indian Medical PG Question 6: Which of the following is not true of acute conjunctivitis?
- A. Vision is not affected
- B. Topical antibiotics are the mainstay of treatment (Correct Answer)
- C. Pupil remains unaffected
- D. Corneal infiltration occurs
Conjunctivitis: Allergic Explanation: ***Topical antibiotics are the mainstay of treatment***
- This is **NOT true** because **viral conjunctivitis** accounts for approximately **80% of acute conjunctivitis cases** and **does not respond to antibiotics**.
- Most acute conjunctivitis is **self-limiting** and resolves spontaneously within 1-2 weeks.
- **Bacterial conjunctivitis** may benefit from topical antibiotics, but they are not the "mainstay" since most cases are viral.
- Treatment focus should be on supportive care, cool compresses, and artificial tears.
*Vision is not affected*
- This statement **is true**; acute conjunctivitis primarily affects the **conjunctiva** and typically **does not impair visual acuity**.
- Vision remains **normal** in uncomplicated cases.
- Any significant vision loss would suggest **keratitis**, **uveitis**, or other more serious conditions.
*Corneal infiltration occurs*
- This statement **is generally true** for certain types of viral conjunctivitis, particularly **epidemic keratoconjunctivitis (EKC)** caused by adenovirus.
- **Subepithelial infiltrates** can develop in the cornea, especially 1-2 weeks after onset, causing decreased vision and foreign body sensation.
- However, in simple acute bacterial conjunctivitis, corneal involvement is uncommon unless it progresses to keratoconjunctivitis.
*Pupil remains unaffected*
- This statement **is true**; the pupil's size and reactivity are governed by the iris and ciliary body, which are **not involved** in conjunctivitis.
- Any pupillary abnormalities (irregular pupil, poor reaction) would indicate **anterior uveitis** or **intraocular inflammation**, not simple conjunctivitis.
Conjunctivitis: Allergic Indian Medical PG Question 7: In chronic allergy, which Ig is more persistent in the body?
- A. Ig A
- B. Ig E (Correct Answer)
- C. Ig G
- D. Ig M
Conjunctivitis: Allergic Explanation: ***Ig E***
- **IgE** is the primary antibody involved in **allergic reactions**, binding to receptors on **mast cells** and **basophils** to trigger histamine release.
- In chronic allergy, sustained exposure to allergens leads to continuous production of IgE, making it a **persistent** and dominant immunoglobulin in the allergic response.
*Ig A*
- **IgA** is mainly found in **mucosal secretions**, such as tears, saliva, and gut, protecting against pathogens at these sites.
- While important for immunity, IgA does not play a direct role in the **immediate hypersensitivity reactions** characteristic of chronic allergies.
*Ig G*
- **IgG** is the most abundant antibody in serum, providing **long-term immunity** against pathogens through neutralization, opsonization, and complement activation.
- Though present, IgG is not the **primary mediator** of the **allergic response** in chronic allergy, instead often associated with protective immunity or certain non-IgE mediated hypersensitivities.
*Ig M*
- **IgM** is the first antibody produced during a **primary immune response** and is effective at activating the complement system.
- It is predominantly found in the bloodstream and functions as a **short-term defender**, but it is not directly involved in the pathogenesis or persistence of chronic allergies.
Conjunctivitis: Allergic Indian Medical PG Question 8: Which of the following is not a treatment option for vernal keratoconjunctivitis?
- A. Steroids
- B. Chromaglycate
- C. Olopatadine
- D. Antibiotics (Correct Answer)
Conjunctivitis: Allergic Explanation: ***Antibiotics***
- **Vernal keratoconjunctivitis (VKC)** is a non-infectious, **allergic inflammatory condition** of the conjunctiva.
- Antibiotics are primarily used to treat bacterial infections and have **no direct role** in the management of VKC.
*Steroids*
- **Topical corticosteroids** (e.g., prednisolone, loteprednol, fluorometholone) are a mainstay of VKC treatment, especially for severe cases and acute exacerbations.
- They significantly reduce inflammation and associated symptoms by **suppressing the immune response**.
*Chromaglycate*
- **Sodium cromoglycate** is a **mast cell stabilizer** commonly used in the treatment of VKC.
- It works by preventing the degranulation of mast cells, thereby **inhibiting the release of inflammatory mediators** like histamine.
*Olopatadine*
- **Olopatadine** is a dual-acting medication that functions as both an **antihistamine** and a **mast cell stabilizer**.
- It provides rapid relief from itching and other allergic symptoms by blocking histamine receptors and stabilizing mast cells.
Conjunctivitis: Allergic Indian Medical PG Question 9: Which one of the following is a criterion of Kawasaki disease?
- A. Edema
- B. Rash (Correct Answer)
- C. Purulent conjunctivitis
- D. Strawberry tongue
Conjunctivitis: Allergic Explanation: ***Rash***
- A **polymorphous rash**, which can be macular, papular, or scarlatiniform, is one of the **five principal diagnostic criteria** for **Kawasaki disease**.
- This rash typically appears early in the course of the illness and can affect any part of the body, often involving the trunk and extremities.
*Edema*
- **Edema of the hands and feet**, especially when accompanied by **erythema** (redness), is actually one of the **principal diagnostic criteria** for Kawasaki disease under "extremity changes."
- This finding typically occurs in the acute phase, followed by **desquamation** (peeling) in the convalescent phase, particularly in the periungual region.
- Note: While edema is a valid criterion, **rash** is considered the most characteristic and commonly used criterion among the options listed.
*Purulent conjunctivitis*
- **Kawasaki disease** characteristically presents with **bilateral non-purulent (non-exudative) conjunctival injection** - red eyes without discharge or exudate.
- **Purulent conjunctivitis** (conjunctivitis with pus/discharge) indicates a bacterial infection and actually argues **against** the diagnosis of Kawasaki disease.
- This is the only option that is definitively **not** a criterion.
*Strawberry tongue*
- **Strawberry tongue** (red, swollen tongue with prominent papillae) is part of the **oral changes criterion** in Kawasaki disease, which includes red cracked lips, strawberry tongue, and erythema of the oropharyngeal mucosa.
- While also seen in scarlet fever and toxic shock syndrome, strawberry tongue is a **recognized feature** of Kawasaki disease.
- Note: This is technically a valid criterion, though less specific than the polymorphous rash.
Conjunctivitis: Allergic Indian Medical PG Question 10: Which of the following is not a treatment for vernal keratoconjunctivitis?
- A. Chromoglycate
- B. Olopatadine
- C. Steroids
- D. Antibiotics (Correct Answer)
Conjunctivitis: Allergic Explanation: ***Antibiotics***
- **Vernal keratoconjunctivitis (VKC)** is an **allergic inflammatory condition**, not a bacterial infection, making antibiotics ineffective for its primary treatment.
- While secondary bacterial infections can occur, antibiotics are not a first-line or primary treatment for the underlying allergic inflammation of VKC.
*Steroids*
- **Steroids**, especially topical corticosteroids, are highly effective in managing acute exacerbations and severe inflammation in VKC due to their potent anti-inflammatory effects.
- Long-term use requires careful monitoring due to potential side effects like **cataracts** and **glaucoma**.
*Chromoglycate*
- **Cromolyn sodium (chromoglycate)** is a **mast cell stabilizer** that prevents the release of inflammatory mediators, thus helping to manage chronic allergic symptoms in VKC.
- It is often used as a **preventative measure** or for maintenance therapy, not for acute flares.
*Olopatadine*
- **Olopatadine** is a dual-acting medication that functions as both an **antihistamine** and a **mast cell stabilizer**, making it effective in reducing allergic symptoms like itching and redness in VKC.
- It is commonly used for symptomatic relief in allergic conjunctivitis conditions, including VKC.
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