Leprosy Elimination — MCQs
Asymmetrical nerve thickening with several hypoesthetic macules on skin indicates which stage of leprosy:
The following pathogen does not satisfy 'Koch's postulates'-
You have noticed an ape-like thumb in a 30-year-old man from Bihar who is a known patient of leprosy. Which of the following tests is not done to show the nerve involved in this condition?
What is the first symptom of leprosy?
All of the following are indicative of effective leprosy control programme except:
Which of the following regimens is recommended for multibacillary leprosy in children of 10 to 14 years of age?
Statement 1 - A 59-year-old patient presents with flaccid bullae. Histopathology shows a suprabasal acantholytic split. Statement 2 - The row of tombstones appearance is diagnostic of Pemphigus vulgaris.
Which disease is classified as 'multibacillary'?
Identify the logo?
Identify the character shown in the image:
Leprosy Elimination Indian Medical PG Practice Questions and MCQs
Question 1: Asymmetrical nerve thickening with several hypoesthetic macules on skin indicates which stage of leprosy:
- A. Tuberculoid leprosy
- B. Borderline lepromatous
- C. Borderline borderline leprosy
- D. Borderline tuberculoid (Correct Answer)
Explanation: ***Borderline tuberculoid (BT)*** - This stage is characterized by **prominent asymmetrical nerve thickening**, which is a hallmark feature distinguishing it from other borderline forms. - Patients typically present with **several (5-10 or more) asymmetrically distributed hypoesthetic macules or plaques** with well-defined borders, reflecting a strong but not complete cell-mediated immune response. - The combination of asymmetrical nerve involvement with multiple skin lesions is **classic for BT leprosy**, making it more stable than BB and with more lesions than pure TT. *Tuberculoid leprosy (TT)* - Characterized by **very few skin lesions (1-5)**, typically solitary or up to 5 well-demarcated hypopigmented or erythematous macules with complete anesthesia. - While asymmetrical nerve thickening occurs, the key differentiator is the **fewer number of lesions** - "several" macules suggests more than the typical TT presentation. *Borderline borderline (BB)* - Represents the **most unstable form** in the borderline spectrum, with numerous (often 10-30) moderately defined lesions. - Nerve involvement is present but **less prominently asymmetrical** than in BT, with features intermediate between tuberculoid and lepromatous poles. - The emphasis on "asymmetrical nerve thickening" in the question stem points away from BB toward the tuberculoid end of the spectrum. *Borderline lepromatous (BL)* - Marked by **many poorly defined lesions (often >30)** that are becoming more **symmetrically distributed**. - Nerve thickening is less prominent and **more symmetrical** than in BT or BB, reflecting a weaker cell-mediated immune response. - The asymmetrical pattern described in the question is not characteristic of BL.
Question 2: The following pathogen does not satisfy 'Koch's postulates'-
- A. Clostridium tetani
- B. Lepra bacilli (Correct Answer)
- C. Mycobacterium tuberculosis
- D. Bacillus anthracis
Explanation: ***Lepra bacilli*** - *Mycobacterium leprae* cannot be **cultured in vitro** on artificial media, failing the third postulate of growing the pathogen in pure culture. - Ethical considerations and the long **incubation period** of leprosy also make experimental infection of healthy hosts problematic. *Clostridium tetani* - This bacterium can be successfully **isolated** and **cultured in vitro**, and inoculation into susceptible animals reproduces tetanus. - *C. tetani* generally satisfies Koch's postulates, as its **toxin production** directly causes the disease. *Mycobacterium tuberculosis* - *Mycobacterium tuberculosis* can be **isolated in pure culture** and causes tuberculosis when inoculated into susceptible animals. - It largely fulfills Koch's postulates, confirming its role as the causative agent of **tuberculosis**. *Bacillus anthracis* - **Robert Koch** himself used *Bacillus anthracis* to demonstrate his postulates, confirming it as the causative agent of anthrax. - It can be **isolated**, **cultured**, and used to **reproduce the disease** experimentally in animals.
Question 3: You have noticed an ape-like thumb in a 30-year-old man from Bihar who is a known patient of leprosy. Which of the following tests is not done to show the nerve involved in this condition?
- A. Benediction sign (pointing index deformity)
- B. Pen test
- C. Ochsner clasp sign
- D. Card test (Correct Answer)
Explanation: ***Card test*** - The **card test** assesses the strength of the **adductor pollicis muscle**, which is innervated by the **ulnar nerve**. - An **ape-like thumb** is caused by strong wrist extensors and thumb abductors relative to weak opposition and adductor muscles. This is caused by **median nerve palsy**, not ulnar nerve palsy. *Benediction sign (pointing index deformity)* - The **Benediction sign** is a clinical manifestation of **median nerve palsy**, where the index and middle fingers remain extended when the patient attempts to make a fist. - This test is used to identify **median nerve damage**, which can lead to an ape-like thumb. *Pen test* - The **pen test** is used to assess the strength of the **opponens pollicis muscle**, which is innervated by the **median nerve**. - In a patient with **median nerve palsy**, the inability to oppose the thumb (i.e., touch the tip of the thumb to the tip of the little finger) is a key sign. *Ochsner clasp sign* - The **Ochsner clasp sign** evaluates the ability to flex the **distal interphalangeal joint of the thumb** and the **proximal interphalangeal joint of the index finger**, both of which are primarily median nerve functions. - A patient with **median nerve palsy** will have difficulty making a strong clasp, as the thumb's ability to flex and oppose is compromised.
Question 4: What is the first symptom of leprosy?
- A. Decreased vibration & position sense
- B. Decreased pain (Correct Answer)
- C. Decreased temperature
- D. Decreased light touch
Explanation: Decreased pain - Leprosy primarily targets Schwann cells in peripheral nerves, leading to sensory loss [1]. - The sensation of pain is typically affected earliest, often presenting as areas of numbness [1]. Decreased vibration & position sense - These sensations are typically carried by larger myelinated fibers, which tend to be affected later in the disease progression of leprosy. - While eventually involved, they are not usually the first symptom of sensory loss. Decreased temperature - Temperature sensation is also an early modality affected in leprosy, as it's carried by small, unmyelinated or thinly myelinated fibers [1]. - However, pain is often cited as the very first sensory loss, even preceding temperature changes in some cases. Decreased light touch - Light touch sensation is generally an early loss, similar to pain and temperature, due to damage to nerve fibers in the skin. - But, when distinguishing the absolute first symptom, pain perception often shows impairment even before light touch in affected areas.
Question 5: All of the following are indicative of effective leprosy control programme except:
- A. Reduction in type 2 disability cases
- B. Increased detection of new cases
- C. Increasing number of children affected (Correct Answer)
- D. Reduction in new multibacillary cases
Explanation: ***Increasing number of children affected*** - An increasing number of **children affected** by leprosy indicates ongoing **transmission** within the community, which is a sign of an **ineffective** or failing control program. - Children are usually recent infections and indicate active disease transmission, reflecting poorly on efforts to control the spread of *Mycobacterium leprae*. - **Reduction in child cases** is a key WHO indicator of program success. *Reduction in type 2 disability cases* - A reduction in **type 2 disability cases** (severe, permanent disabilities) is a positive indicator, suggesting early detection and effective management, thereby minimizing long-term complications. - This reflects successful efforts in prompt diagnosis and treatment, preventing progression to irreversible nerve damage and deformities. *Increased detection of new cases* - An increase in the **detection of new cases**, especially in the initial phases of a program, can indicate improved surveillance, screening, and **case-finding activities**. - This suggests that more hidden cases are being found and brought to treatment, which is crucial for interrupting transmission and achieving eventual control. *Reduction in new multibacillary cases* - A reduction in **multibacillary (MB) cases** indicates decreasing transmission of highly infectious leprosy cases in the community. - MB cases are the main source of transmission, so their reduction reflects effective treatment coverage and interruption of disease spread. - This is a positive indicator of program effectiveness.
Question 6: Which of the following regimens is recommended for multibacillary leprosy in children of 10 to 14 years of age?
- A. Rifampicin 600 mg once a month (under supervision) + Dapsone 50 mg daily (self-administered)
- B. Rifampicin 600 mg once a month (under supervision)+ Dapsone 100 mg daily (self-administered)+ Clofazimine 50 mg once a month (under supervision) and 25 mg every alternate day
- C. Rifampicin 450 mg once a month (under supervision) + Dapsone 50 mg daily (self-administered)
- D. Rifampicin 450 mg once a month (under supervision)+ Dapsone 50 mg daily (self-administered)+ Clofazimine 150 mg once a month (under supervision) and 50 mg every alternate day (Correct Answer)
Explanation: ***Rifampicin 450 mg once a month (under supervision)+ Dapsone 50 mg daily (self-administered)+ Clofazimine 150 mg once a month (under supervision) and 50 mg every alternate day*** - This regimen reflects the **reduced dosages** for children aged 10-14 years for all three drugs: Rifampicin, Dapsone, and Clofazimine, as recommended by WHO guidelines for multibacillary leprosy. - The combination of these three drugs is crucial for effective treatment of **multibacillary leprosy**, which involves multiple lesions and higher bacterial load, for a duration of 12 months. *Rifampicin 600 mg once a month (under supervision) + Dapsone 50 mg daily (self-administered)* - While Dapsone dosage is appropriate, the **Rifampicin dosage (600 mg)** is too high for a child of this age group. - This regimen also omits **Clofazimine**, which is an essential drug for multibacillary leprosy treatment to prevent drug resistance and reduce bacterial load. *Rifampicin 600 mg once a month (under supervision)+ Dapsone 100 mg daily (self-administered)+ Clofazimine 50 mg once a month (under supervision) and 25 mg every alternate day* - The dosages for **Rifampicin (600 mg)** and **Dapsone (100 mg)** are both adult dosages and are too high for children aged 10-14 years. - The Clofazimine dosage also differs from the recommended pediatric dosage for multibacillary leprosy. *Rifampicin 450 mg once a month (under supervision) + Dapsone 50 mg daily (self-administered)* - While the Rifampicin and Dapsone doses are appropriate for children, this regimen is missing **Clofazimine**, making it incomplete for the treatment of multibacillary leprosy. - Omission of Clofazimine would lead to a higher risk of **treatment failure** and drug resistance in multibacillary cases.
Question 7: Statement 1 - A 59-year-old patient presents with flaccid bullae. Histopathology shows a suprabasal acantholytic split. Statement 2 - The row of tombstones appearance is diagnostic of Pemphigus vulgaris.
- A. Statements 1 & 2 are correct, 2 is not explaining 1 (Correct Answer)
- B. Statements 1 and 2 are correct and 2 is the correct explanation for 1
- C. Statements 1 and 2 are incorrect
- D. Statement 1 is incorrect
Explanation: ***Correct: Statements 1 & 2 are correct, 2 is not explaining 1*** **Analysis of Statement 1:** - A 59-year-old patient with **flaccid bullae** and **suprabasal acantholytic split** on histopathology is the classic presentation of **Pemphigus vulgaris** - The flaccid (easily ruptured) nature of bullae distinguishes it from tense bullae seen in bullous pemphigoid - The suprabasal location of the split (just above the basal layer) with acantholysis (loss of cell-to-cell adhesion) is pathognomonic - **Statement 1 is CORRECT** ✓ **Analysis of Statement 2:** - The **"row of tombstones" or "tombstone appearance"** is indeed a diagnostic histopathological feature of Pemphigus vulgaris - This appearance results from basal keratinocytes remaining attached to the basement membrane while suprabasal cells separate due to acantholysis - The intact basal cells standing upright resemble a row of tombstones - **Statement 2 is CORRECT** ✓ **Does Statement 2 explain Statement 1?** - Statement 2 describes a **histopathological appearance** (tombstone pattern) that is a **consequence** of the suprabasal split - However, it does NOT explain the **underlying cause** of the flaccid bullae or the suprabasal split - The true explanation involves **IgG autoantibodies against desmoglein 3 (and desmoglein 1)**, which attack intercellular adhesion structures (desmosomes), causing **acantholysis** - Therefore, **Statement 2 does NOT explain Statement 1** ✗ *Incorrect: Statement 2 is the correct explanation for Statement 1* - While both statements describe features of Pemphigus vulgaris, the tombstone appearance is a descriptive finding, not an explanatory mechanism *Incorrect: Statements 1 and 2 are incorrect* - Both statements are medically accurate descriptions of Pemphigus vulgaris features *Incorrect: Statement 1 is incorrect* - Statement 1 correctly describes the cardinal clinical and histopathological features of Pemphigus vulgaris
Question 8: Which disease is classified as 'multibacillary'?
- A. Leprosy (Correct Answer)
- B. Tuberculosis
- C. Trachoma
- D. Tetanus
Explanation: **Leprosy** - Leprosy, caused by *Mycobacterium leprae*, is classified by the **WHO** into **paucibacillary (PB)** and **multibacillary (MB)** forms based on bacterial load and number of skin lesions. - **Multibacillary leprosy** is defined as having more than 5 skin lesions with positive skin smears, requiring a longer treatment regimen (12 months of multidrug therapy with rifampicin, dapsone, and clofazimine). - This classification is specific to **leprosy** and is crucial for determining appropriate treatment duration and drug combinations. *Tuberculosis* - Tuberculosis is classified by **anatomical location** (pulmonary vs. extrapulmonary), **drug susceptibility** (drug-sensitive vs. drug-resistant), or **smear status** (smear-positive vs. smear-negative). - The term **'multibacillary'** is not used in TB classification, making this an incorrect option. *Trachoma* - Trachoma is a chronic **keratoconjunctivitis** caused by *Chlamydia trachomatis*, classified by **clinical stages** (TF, TI, TS, TT, CO) according to the WHO simplified grading system. - The paucibacillary/multibacillary classification does **not apply** to trachoma. *Tetanus* - Tetanus is a **toxin-mediated disease** caused by *Clostridium tetani*, manifesting as muscle spasms and lockjaw. - Classification is based on **clinical severity** (localized, generalized, cephalic, neonatal), not bacterial load, making the term 'multibacillary' inapplicable.
Question 9: Identify the logo?
- A. Leprosy (Correct Answer)
- B. TB
- C. Malaria
- D. HIV
Explanation: ***Leprosy*** - This logo, often featuring a stylized flower or protective shape, is widely recognized as a symbol associated with **leprosy awareness** and efforts to eradicate the disease. - Organizations dedicated to **leprosy elimination** and care frequently use similar designs to represent compassion, hope, and the journey towards healing for individuals affected by this condition. *TB* - The emblem for **tuberculosis (TB)** awareness predominantly features a **red ribbon**, which symbolizes solidarity in the fight against the disease. - While TB is a global health concern, its associated imagery differs significantly from the flower-like logo presented. *Malaria* - The international symbol for **malaria** often incorporates a stylized **mosquito** or images representing its lifecycle and geographic prevalence. - The logo displayed does not resemble any common imagery used in malaria prevention or awareness campaigns. *HIV* - The **red ribbon** is the most universally recognized symbol for **HIV/AIDS** awareness, representing solidarity with people living with HIV and those who have died from AIDS. - This specific logo does not align with the established iconography for HIV/AIDS.
Question 10: Identify the character shown in the image:
- A. Arohi from HIV
- B. Meena from UNICEF
- C. None of the options
- D. Sapna from Leprosy campaign (Correct Answer)
Explanation: ***Sapna from Leprosy campaign*** - The image depicts Sapna, a character created for the **National Leprosy Eradication Programme (NLEP)** in India. - This character was developed as part of public health campaigns to spread awareness about leprosy and reduce stigma associated with the disease. - Sapna has been widely used in educational materials and community outreach programs for leprosy awareness. *Arohi from HIV* - Arohi is a different character associated with awareness campaigns for **HIV/AIDS**, not leprosy. - She is part of distinct public health initiatives focusing on HIV prevention, treatment, and stigma reduction under the National AIDS Control Programme. *Meena from UNICEF* - Meena is a prominent animated character created by **UNICEF** to advocate for children's rights, particularly girls' education, gender equality, health, and child protection. - While UNICEF works on a wide range of health issues including communicable diseases, Meena is not specifically associated with the leprosy awareness campaign. *None of the options* - The image clearly depicts the character **Sapna**, who is specifically associated with leprosy awareness campaigns in India. - Therefore, the first option accurately identifies the character and her associated health program.
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