The worm transmitted by walking in agriculture field is :

Appeared in: IGNOU PB Bsc Entrance-2022

Explanation

Hookworm infection is caused by nematodes like Ancylostoma duodenale and Necator americanus.
Their eggs are passed in feces and hatch in warm, moist soil, developing into infective larvae.
These larvae can actively penetrate human skin, which is the primary mode of infection.
Walking barefoot on contaminated soil, a common practice in agricultural settings, provides the opportunity for skin penetration, typically through the feet.

Option A: Roundworm (Ascaris lumbricoides) infection occurs via the fecal-oral route, by ingesting food or water contaminated with its eggs, not through skin penetration.
Option C: Tapeworm infection is acquired by consuming raw or undercooked meat (beef for Taenia saginata, pork for Taenia solium) containing infective cysts.
Option D: Pinworm (Enterobius vermicularis) is transmitted via the fecal-oral route, typically by ingesting eggs from contaminated hands, bedding, or clothing. It is not transmitted from soil via skin penetration.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Mode of transmission for common helminthic infections as background academic context rather than a clinical decision trigger.
Hookworm infection is a significant occupational hazard for farmers and agricultural laborers who may not have access to or consistently use protective footwear.
Nurses should consider hookworm infection in the differential diagnosis for patients from endemic areas presenting with unexplained iron-deficiency anemia, malnutrition, and a history of walking barefoot.
Patient education is a key nursing intervention, focusing on the importance of wearing shoes, proper sanitation, and safe disposal of human feces to break the transmission cycle.

How to Approach the Question

First, identify the key action in the question stem: 'walking in agriculture field'.
Next, analyze the mode of transmission implied by this action. 'Walking' suggests contact between the feet and the ground (soil).
Review the modes of transmission for each option. Recall or deduce how each worm infects humans.
Roundworm, Tapeworm, and Pinworm are primarily transmitted through ingestion (oral route).
Hookworm is uniquely transmitted among these options by larval penetration of the skin from contaminated soil.
Therefore, the worm transmitted by walking in a field is the Hookworm.

Concept Tested & Keywords

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E6 Parks TextBook of Preventive & Social Medicine part 1 — Subpart B (pp 202-403 of 604) p. 99-101

E6 Medicine Harrison 22e Part 1 pp. 1777-1779, 1855-1857

Practise the full IGNOU PB Bsc Entrance-2022

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