FMGE 2017 — Community Medicine

Q: What is the incubation period of hepatitis B?

45 - 180 days. ***45 - 180 days*** - The typical incubation period for **Hepatitis B** infection ranges from **45 to 180 days** (approximately 6 weeks to 6 months). - This relatively long incubation period is characteristic of the **Hepadnaviridae family** to which HBV belongs. *1 - 30 days* - This period is generally too short for **Hepatitis B** and is more typical for certain **bacterial or viral respiratory illnesses**. - It does not align with the known epidemiology and viral replication cycle of **HBV**. *2 weeks - 6 months* - While **6 months** falls within the upper range, the lower limit of **2 weeks** (14 days) is generally too short for the typical incubation period of Hepatitis B. - The more precise range starts closer to **6 weeks (42 days)**. *15 - 45 days* - This range is too short for the common incubation period of **Hepatitis B**. - This period is more commonly associated with other viral infections, such as **Hepatitis A**. [Practice more Community Medicine PYQs on OnCourse]

Q: In a clinical laboratory, when is sample registration typically performed?

When samples are received at the laboratory. ***When samples are received at the laboratory*** - **Sample registration** is a critical step performed immediately upon a sample's arrival to ensure proper identification and tracking throughout its lifecycle in the laboratory. - This initial registration helps prevent **errors**, maintains **sample integrity**, and establishes a clear **audit trail**. *At the end of each working day* - Delaying registration until the end of the day introduces a significant risk of **misidentification**, **loss**, or **degradation** of samples. - Urgent or time-sensitive tests would be unduly **delayed**, potentially impacting patient care. *Once per week during batch processing* - Weekly batch processing for registration is entirely unsuitable for a clinical laboratory, where timely processing of individual samples is paramount. - This practice would lead to a massive backlog, compromise **sample stability**, and make it impossible to provide **prompt results** for patient diagnosis and treatment. *Only during quality control audits* - **Quality control audits** periodically review laboratory processes, including registration, but do not replace the need for real-time, continuous sample registration. - Relying solely on audits for registration would mean unregistered samples are processed, leading to **untraceable results** and potential patient harm. [Practice more Community Medicine PYQs on OnCourse]

2 Previous Year Questions with Answers & Explanations

Questions

All Subjects Anatomy (10)Biochemistry (4)Community Medicine (2)Dental (1)Dermatology (1)Internal Medicine (14)Microbiology (2)Obstetrics and Gynecology (3)Ophthalmology (2)Orthopaedics (2)Pathology (5)Pediatrics (2)Pharmacology (16)Physiology (5)Psychiatry (6)Radiology (1)Surgery (2)

What is the incubation period of hepatitis B?

In a clinical laboratory, when is sample registration typically performed?