Viral cytopathic effects: Intranuclear inclusion bodies are characteristically observed in cells infected with which viruses?

Introduction / Context:
Recognizing intranuclear versus intracytoplasmic inclusions helps narrow the differential diagnosis in viral infections. Different DNA viruses leave distinctive histologic footprints.

Given Data / Assumptions:

• Parvoviruses can produce intranuclear inclusions.
• Herpesviruses produce Cowdry-type intranuclear inclusions.
• Adenoviruses classically cause smudgy intranuclear inclusions.

Concept / Approach:
Most DNA viruses replicate in the nucleus and may form intranuclear inclusions, with poxviruses being a notable exception (cytoplasmic replication). The listed viruses are well-known for nuclear inclusions.

Step-by-Step Solution:
List each virus family and typical inclusion location. Confirm nuclear inclusions for parvo, herpes, adeno. Select the aggregate correct option “all of these”.

Verification / Alternative check:
Histopathologic atlases describe these hallmark nuclear changes for teaching and diagnosis.

Why Other Options Are Wrong:
Any single-virus choice omits other true examples; “none” contradicts established findings.

Common Pitfalls:
Confusing poxvirus cytoplasmic inclusions with the nuclear inclusions of most other DNA viruses.

Final Answer:
all of these.