Mode of transmission in case of hepatitis B is mostly by one of the following?

IGNOU Post B. SC. Nursing entrance -2021

Medical Surgical Nursing

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Appeared in: IGNOU Post B. SC. Nursing entrance -2021

Explanation

Hepatitis B virus (HBV) is primarily transmitted via the parenteral route, which involves contact with infected blood or blood products.
Blood contains the highest concentration (viral load) of HBV, making it the most infectious fluid and the most efficient mode of transmission.
This route includes activities like blood transfusions, sharing contaminated needles for drug use, accidental needlestick injuries in healthcare settings, and using unsterilized equipment for procedures like tattooing or piercing.

Option B: While sexual intercourse is a common mode of transmission for Hepatitis B, it is generally considered secondary to blood-borne transmission in terms of efficiency because the viral concentration in semen and vaginal fluids is lower than in blood.
Option C: Droplet transmission involves respiratory particles expelled by coughing or sneezing. Hepatitis B is a blood-borne pathogen and is not transmitted through the air.
Option D: Fomites are inanimate objects that can carry infectious agents. While HBV can survive on surfaces for a period, transmission through this route is uncommon and not the primary mode of spread.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Hepatitis B transmission routes as background academic context rather than a clinical decision trigger.
Nurses and other healthcare workers must strictly adhere to Standard Precautions, including using personal protective equipment (PPE), safe injection practices, and proper handling of blood and body fluids to prevent occupational exposure to HBV.
Vaccination is the most effective way to prevent Hepatitis B. Healthcare workers should be vaccinated, and post-exposure prophylaxis (PEP) with Hepatitis B immune globulin (HBIG) and the vaccine series is critical for unvaccinated individuals after an exposure event.
What if the question asked about Hepatitis A? The correct answer would be the fecal-oral route, as it is typically spread through ingestion of contaminated food or water.

How to Approach the Question

First, identify the key concept in the question: the most common or primary mode of transmission for Hepatitis B.
Recall the different categories of disease transmission (e.g., blood-borne, airborne, droplet, fecal-oral).
Associate Hepatitis B with its category, which is a blood-borne/serum-transmitted disease.
Evaluate the given options. 'Blood or blood products' directly aligns with the primary parenteral route.
Consider the other options. While 'sexual intercourse' is a valid transmission route for HBV, the viral load is highest in blood, making blood-borne transmission the most efficient. 'Droplet' and 'fomites' are incorrect routes for HBV.
Conclude that transmission via blood is the most significant route, making it the correct answer.

Concept Tested & Keywords

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E6 Parks TextBook of Preventive & Social Medicine part 1 — Subpart B (pp 202-403 of 604) p. 66-68

E6 Medicine Harrison 22e Part 2 p. 556-558