What is the name of the causative agent (causative agent) of typhoid fever?

Appeared in: MP CHO -2019 (Shift-1)

Explanation

Typhoid fever, also known as enteric fever, is a systemic infection caused by the bacterium Salmonella enterica serotype Typhi (S. Typhi).
This pathogen is a gram-negative bacterium that is highly adapted to humans, who are the only natural host and reservoir.
Transmission occurs through the fecal-oral route, most commonly by ingesting food or water contaminated with the feces of an infected person.
The incubation period typically ranges from 7 to 14 days, after which symptoms like sustained high fever, headache, and abdominal discomfort appear.

Option B: Human Papillomavirus (HPV) is a virus, not a bacterium. It is not associated with typhoid fever.
Option C: Fungi are a distinct kingdom of eukaryotic organisms and do not cause typhoid fever, which is a bacterial disease.
Option D: Plasmodium vivax is a protozoan parasite, not a bacterium, and is unrelated to typhoid fever.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Identification of the causative agent for typhoid fever as background academic context rather than a clinical decision trigger.
Nurses are central to public health education regarding typhoid prevention, emphasizing hand hygiene, safe food handling, and the importance of clean water sources.
In a clinical setting, a nurse should maintain a high index of suspicion for typhoid fever in patients with a sustained fever, especially if they have a history of travel to endemic areas.
Accurate diagnosis is crucial. Nurses should know that blood culture is the most reliable diagnostic test in the first week of illness, while serological tests like Widal are more useful later.

How to Approach the Question

This is a factual recall question testing your knowledge of common infectious diseases and their causative agents.
First, identify the core components of the question: the disease ('typhoid fever') and what is being asked ('causative agent').
Next, systematically evaluate each option by recalling the type of pathogen and the disease it causes.
Option A, Salmonella Typhi, is a well-known bacterium that causes typhoid.
Option B, Human Papillomavirus, is a virus linked to warts and cancer.
Option C, Fungi, represents a broad category of organisms that cause mycoses, not typhoid.

Concept Tested & Keywords

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E6 Comprehensive Textbook of Community Health Nursing for BSc Nursing Students Part 2 — Subpart A (pp 1-275 of 550) p. 32-34

E6 Nelson Textbook of Pediatrics(2024) — Volume 1 p. 1775-1777

E6 Ghai Essential Pediatrics(pp 26-904 of 913) p. 266-268

Practise the full MP CHO -2019 (Shift-1)

Attempt every question from this paper in a timed mock, then review the full solution for each one.