SZABMU MS Part-I Paper II MCQs: Fluids, Electrolytes, Sepsis & Infections

Sample SZABMU MS Part-I Paper II MCQs for fluids and electrolytes (20%), inflammation and sepsis (15%) and infections (5%), with answers and explanations.

Fluids and electrolytes (20%) and inflammation and sepsis (15%) carry more than a third of SZABMU MS Part-I Paper II, with infections adding 5%. These are the topics where an organised approach pays the most. Here is a sample from our MS bank.

Sample MCQs

1. A patient with chronic renal failure has ABGs: pH 7.23, PCO2 23, bicarbonate 12. What is the interpretation?

A) Metabolic acidosis
B) Respiratory acidosis with partial compensation
C) Metabolic acidosis with partial compensation ✅
D) Respiratory acidosis

Low pH with low bicarbonate is metabolic acidosis; the low PCO2 shows respiratory compensation, and pH is still abnormal so compensation is partial.

2. What is the ECG change that would alert you to severe hyperkalaemia in a patient?

A) Ventricular tachyarrhythmia
B) Sinusoidal pattern (sine wave) ✅
C) U waves
D) Tall T waves

A sine-wave pattern from merging of widened QRS and T waves signals impending ventricular fibrillation in severe hyperkalaemia.

3. In a patient with history of muscle cramps and carpopedal spasm, which of the following serum electrolyte levels is most likely to be low?

A) Potassium
B) Calcium ✅
C) Chloride
D) Magnesium

Muscle cramps and carpopedal spasm are features of hypocalcaemic tetany.

4. A patient presents with vaginal and gum bleeds, her platelet count is 20,000. She has high-grade fever and periorbital pain. Her heart rate is 120 and BP is 80/60. What is the diagnosis?

A) Dengue fever
B) Haemophilia
C) Dengue haemorrhagic shock syndrome ✅
D) Dengue haemorrhagic fever

Dengue with bleeding, thrombocytopenia and hypotension is dengue haemorrhagic shock syndrome.

5. A diabetic wound producing gas: causative organism?

A) Mycobacterium tuberculosis
B) Clostridium perfringens ✅
C) Staph. aureus
D) Actinomycosis

Gas in a diabetic wound with necrosis is classically produced by Clostridium perfringens, an anaerobe.

6. A patient with HIV now presents with signs of pneumonia, however he has no fever. His recent CD4 count had dropped to 150. You suspect which organism?

A) Influenza virus
B) Pneumocystis jirovecii ✅
C) Mycobacterium avium complex
D) Streptococcus pneumoniae

Pneumocystis jirovecii pneumonia occurs at CD4 below 200 and may present afebrile with dry cough and hypoxia.

7. Crescent-shaped or banana-shaped gametocytes are seen in infection with:

A) Plasmodium falciparum ✅
B) Plasmodium ovale
C) Plasmodium vivax
D) Plasmodium malariae

The crescent-shaped gametocyte is characteristic of Plasmodium falciparum.

8. EBV causes starry sky appearance with which of the following?

A) Burkitt's lymphoma ✅
B) Hodgkin's lymphoma
C) Chronic myelogenous leukaemia
D) Acute lymphoblastic leukaemia

Burkitt lymphoma, associated with EBV, shows the starry-sky histological pattern.

9. Dark field microscopy is used to diagnose which of the following?

A) Treponema pallidum ✅
B) H. ducreyi
C) N. gonorrhoeae
D) Chlamydia trachomatis

Spirochaetes such as Treponema pallidum are too thin to be Gram stained and are seen by dark-field microscopy.

How to Handle This Block

Learn the electrolyte emergencies as protocols: hyperkalaemia, hyponatraemia and calcium disorders.
Know the acid-base patterns and their usual causes.
For sepsis and shock, be able to name the type and the first intervention.

Practise topic-wise in the Fluids & Electrolytes, Inflammation & Sepsis and Infections sections of the SZABMU MS QBank. The remaining surgical topics are in endocrine, GIT, neurosurgery and urology MCQs, and the full weightage is in the pattern guide.

Frequently Asked Questions

Which surgical topic has the highest weightage?

Fluids and electrolytes, at 20% of Paper II.

How much is inflammation and sepsis?

15% of Paper II.

Practise With Explanations

The SZABMU MS QBank groups its MCQs by the official Paper I and Paper II surgical topics, with an explanation for every question and topic analytics to show where marks are leaking. The first 20 questions are free, and the mock tests come included with the QBank. The MD bank shares the same Paper I core and swaps Paper II for applied medicine.