Infective hepatitis virus is present in?

NHM MP Staff Nurse - 2015

Applied Microbiology & Infection control

Easy

Appeared in: NHM MP Staff Nurse - 2015

Explanation

"Infective hepatitis" is an older term for Hepatitis A Virus (HAV) infection, which is primarily transmitted via the fecal-oral route.
The virus is heavily shed in the feces of an infected person, especially in the 2-3 weeks before symptoms (jaundice) appear.
A brief period of viremia, where the virus is present in the bloodstream, occurs during the incubation phase of the infection.
Therefore, feces are the primary source, and blood is a transient secondary source, making "Feces & blood" the most accurate option.

Option A: While some studies suggest trace amounts of HAV may be found in saliva, it is not considered a significant vehicle for transmission compared to the fecal-oral route.
Option B: Hepatitis A is a gastrointestinal infection that affects the liver. It is not a respiratory illness, so the virus is not present in sputum.
Option D: This option is incorrect because the virus is not present in sputum, and its presence in saliva is not clinically significant for transmission.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Transmission routes and viral presence of Hepatitis A (Infective Hepatitis) as background academic context rather than a clinical decision trigger.
Understanding that HAV is present in feces is critical for nursing practice. It mandates the use of contact precautions for incontinent patients and reinforces the absolute necessity of stringent hand hygiene for all healthcare workers to prevent nosocomial (hospital-acquired) outbreaks.
Patient education is a key nursing role. Nurses must teach infected individuals and their families about the importance of handwashing after using the bathroom and before preparing food to prevent household transmission.
What if? If the question asked about Hepatitis B ('serum hepatitis'), the correct answer would focus on blood and body fluids (like semen). The primary nursing precautions would shift from enteric/contact precautions to bloodborne pathogen precautions, including needle safety, safe sex education, and screening of blood products.

How to Approach the Question

First, identify the key term 'Infective hepatitis' and recall that it is the common name for Hepatitis A.
Next, access your knowledge about the primary mode of transmission for Hepatitis A, which is the fecal-oral route. This immediately confirms that 'feces' is a correct component of the answer.
Consider the pathophysiology of viral infections. Many systemic viral illnesses, including hepatitis, have a viremic phase where the virus circulates in the blood. This makes 'blood' a plausible location.
Evaluate the remaining options. 'Sputum' is associated with respiratory infections, which Hepatitis A is not. 'Saliva' is a less common route for this virus.
Combine the most accurate findings. The virus is definitively present in feces (primary source) and blood (secondary source). Therefore, 'Feces & blood' is the best and most complete answer among the choices.

Concept Tested & Keywords

Concept Tested: Transmission routes and viral presence of Hepatitis A (Infective Hepatitis)
Stem keywords: Infective hepatitis virus, present in
Lead-in keywords: BEST, MOST RELEVANT CLUE
Negative lead-in flag: false

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E6 Medicine Davidson Principles Practice 24e p. 892-894

E6 Medicine Harrison 22e Part 2 pp. 547-549, 555-557