While Rheumatoid Factor is commonly tested, Anti-CCP antibodies are much more specific for Rheumatoid Arthritis and can often be detected earlier in the course of the disease compared to RF.
22
A patient with suspected Meningitis undergoes a Lumbar Puncture. Low glucose and high protein in the CSF suggest which etiology?
Answer:
Bacterial Meningitis
Bacterial meningitis typically shows a Cerebrospinal Fluid (CSF) profile of high opening pressure, high protein, low glucose (consumed by bacteria), and high white cell count with neutrophil predominance.
23
Which diagnostic test uses high-frequency sound waves to visualize heart structures and function?
Answer:
Echocardiogram
An Echocardiogram is an ultrasound of the heart. It provides real-time images of the heart chambers, valves, and blood flow, allowing clinicians to assess cardiac output and detect structural abnormalities.
24
Which condition is characterized by 'Rice-water stools'?
Answer:
Cholera
Cholera, caused by Vibrio cholerae, leads to massive watery diarrhea that resembles water in which rice has been washed. This is due to the cholera toxin's effect on the intestinal lining.
25
What is the primary use of the 'Apgar Score'?
Answer:
To assess the health of a newborn immediately after birth
The Apgar score is performed at 1 and 5 minutes after birth. It evaluates five criteria: Appearance (skin color), Pulse, Grimace (reflex irritability), Activity (muscle tone), and Respiration.
26
Which hepatitis virus is primarily transmitted through the fecal-oral route?
Answer:
Hepatitis A
Hepatitis A and E are primarily spread through contaminated food and water (fecal-oral). Hepatitis B, C, and D are bloodborne pathogens transmitted through parenteral or sexual contact.
27
Which hormone deficiency is the cause of Diabetes Insipidus?
Answer:
Antidiuretic Hormone (ADH)
Diabetes Insipidus occurs when the body either doesn't produce enough Antidiuretic Hormone (central DI) or the kidneys don't respond to it (nephrogenic DI), leading to excessive thirst and dilute urine.
28
The 'Tinel sign' and 'Phalen maneuver' are used in the diagnosis of which condition?
Answer:
Carpal Tunnel Syndrome
Tinel's sign (percussion over the median nerve) and Phalen's maneuver (forced flexion of the wrist) are provocative tests used to elicit tingling or numbness in patients with suspected Carpal Tunnel Syndrome.
29
Which blood test measures the average blood sugar levels over the past 2–3 months?
Answer:
Glycated Hemoglobin (HbA1c)
HbA1c measures the percentage of hemoglobin that has glucose attached to it. Because red blood cells live for about 120 days, this test provides an average of glycemic control over the preceding 8–12 weeks.
30
Which disease is characterized by the destruction of the myelin sheath in the Central Nervous System?
Answer:
Multiple Sclerosis (MS)
Multiple Sclerosis is an autoimmune disease where the immune system attacks the myelin sheath of nerves in the brain and spinal cord, disrupting communication between the brain and the rest of the body.
31
Which imaging technique is the preferred first-line screening for Gallstones?
Answer:
Abdominal Ultrasound
Ultrasound is the highly sensitive and specific first-line test for Cholelithiasis (gallstones). It is non-invasive, does not use radiation, and can easily identify stones within the gallbladder.
32
Which diagnostic finding is indicative of 'Iron Deficiency Anemia' on a peripheral blood smear?
Answer:
Microcytic, Hypochromic cells
In iron deficiency, the body cannot produce enough hemoglobin, resulting in red blood cells that are smaller than normal (microcytic) and paler than normal (hypochromic).
33
What is the primary cause of 'Gout'?
Answer:
Uric Acid accumulation
Gout is a type of inflammatory arthritis caused by hyperuricemia, leading to the deposition of monosodium urate crystals in joints, most commonly the base of the big toe.
34
Which 'B-type' peptide is measured to help diagnose Heart Failure?
Answer:
BNP (B-type Natriuretic Peptide)
BNP or NT-proBNP are released by the heart ventricles in response to excessive stretching or pressure. Elevated levels are highly suggestive of congestive heart failure and help distinguish it from other causes of dyspnea.
35
Which skin condition is characterized by 'target' or 'iris' lesions?
Answer:
Erythema Multiforme
Erythema multiforme is a hypersensitivity reaction usually triggered by infections (like Herpes Simplex). It presents with 'target' lesions that have a dusky center, a pale ring, and an erythematous outer ring.
36
Which test is the gold standard for diagnosing Obstructive Sleep Apnea?
Answer:
Polysomnography (Sleep Study)
Polysomnography is a comprehensive test that records brain waves, oxygen levels, heart rate, and breathing during sleep, allowing for the calculation of the Apnea-Hypopnea Index (AHI).
37
In the context of respiratory disease, what does 'FEV1/FVC ratio < 0.7' typically signify?
Answer:
Obstructive Lung Disease
A reduced FEV1 (Forced Expiratory Volume in 1 second) relative to FVC (Forced Vital Capacity) indicates an airflow obstruction, characteristic of conditions like Asthma or COPD.
38
Which physical finding is a hallmark of 'Hyperthyroidism' (Grave's Disease)?
Answer:
Exophthalmos (Bulging eyes)
Grave's disease, an autoimmune cause of hyperthyroidism, often presents with infiltrative ophthalmopathy, resulting in exophthalmos or proptosis (protrusion of the eyeballs).
39
Which infectious disease is diagnosed by finding 'Koplik spots' in the mouth?
Answer:
Measles (Rubeola)
Koplik spots are small, white spots (often described as grains of salt on a red background) that appear on the buccal mucosa 2–3 days before the measles rash breaks out. They are pathognomonic for measles.
40
Which cardiac rhythm is characterized by a 'sawtooth' pattern on an ECG?
Answer:
Atrial Flutter
Atrial flutter is a type of supraventricular tachycardia where the atria beat very fast but regularly, creating characteristic 'flutter waves' that resemble the teeth of a saw on an ECG lead.
