What dose of BCG Vaccine is given at birth?

Appeared in: Bihar CHO - 2021

Explanation

The standard dose of BCG vaccine for a newborn at birth (or up to 1 month of age) is 0.05 ml.
This dose is administered via the intradermal route, typically into the left upper arm, to create a small wheal.
A smaller dose is used for newborns because their skin is thinner and their immune system is immature. This helps to minimize local adverse reactions such as abscesses or severe lymphadenitis.
For infants older than one month, the dose is increased to 0.1 ml.

Option A: 5 ml is ten times the correct dose for a newborn and would be a significant overdose, likely causing severe local reactions like large ulcers and abscesses.
Option C: 1 ml is twenty times the correct dose and is an incorrect volume for an intradermal injection, especially for a vaccine.
Option D: 2 ml is an extremely large and incorrect volume for any intradermal injection and would cause significant tissue damage.

Clinical Relevance

Nursing practice connection: Knowing BCG Vaccine Dosage and Administration helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Accurate dosage is critical to prevent adverse effects. Nurses must distinguish between the neonatal dose (0.05 ml) and the infant dose (0.1 ml) to ensure patient safety.
Patient education is a key nursing role. Informing parents about the normal progression of the BCG scar (papule to pustule to ulcer to scar) prevents unnecessary anxiety and inappropriate application of creams or dressings.
What if? If a 2-month-old infant who missed their birth dose presents for vaccination, the correct dose would be 0.1 ml, not 0.05 ml, as their skin and immune system are more mature.

How to Approach the Question

Identify the key elements of the question: 'BCG Vaccine', 'dose', and 'at birth'.
Recognize this as a factual recall question based on the national immunization schedule.
Recall that BCG dosage varies with age. There is a specific dose for newborns and a different dose for older infants.
Differentiate between the neonatal dose (0.05 ml) and the dose for infants older than one month (0.1 ml).
Select the option that corresponds to the dose for newborns.
Eliminate the other options as they represent significant overdoses for an intradermal vaccine.

Concept Tested & Keywords

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E6 Parks TextBook of Preventive & Social Medicine part 1 — Subpart B (pp 202-403 of 604) p. 42-44

E6 Parks TextBook of Preventive & Social Medicine part 1 — Subpart C (pp 404-604 of 604) p. 127-129

Practise the full Bihar CHO - 2021

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