Pharyngoconj unctiva I fever is caused by
**Question:** Pharyngoconjunctival fever is caused by
A. Herpes simplex virus (HSV)
B. Varicella-zoster virus (VZV)
C. Epstein-Barr virus (EBV)
D. Cytomegalovirus (CMV)
**Correct Answer:** Pharyngoconjunctival fever is caused by Herpes simplex virus (HSV).
**Core Concept:** Pharyngoconjunctival fever is a clinical entity characterized by fever, pharyngitis, and conjunctivitis. The term is often used to describe a febrile illness associated with Herpes simplex virus (HSV) infection. HSV is a member of the Herpesviridae family, with two main subtypes: HSV-1 and HSV-2.
**Why the Correct Answer is Right:** HSV primarily targets the mucosal surfaces of the human body, including the oral cavity, genitals, and the ocular surface. When HSV affects the ocular surface, it can lead to genital herpes, oral herpes, or ocular herpes. In the case of pharyngoconjunctival fever, HSV primarily infects the ocular surface, causing inflammation and symptoms in the oropharynx and conjunctiva.
**Why Each Wrong Option is Incorrect:**
A. Herpes simplex virus (HSV) is the correct answer, not HSV-1 or HSV-2 specifically. However, HSV-1 and HSV-2 are types of HSV, not separate causes of pharyngoconjunctival fever.
B. Varicella-zoster virus (VZV) is responsible for chickenpox and shingles. VZV is not associated with pharyngoconjunctival fever.
C. Epstein-Barr virus (EBV) is the etiologic agent for infectious mononucleosis (mono) and not responsible for pharyngoconjunctival fever.
D. Cytomegalovirus (CMV) is the causative agent of cytomegalovirus infections and is not associated with pharyngoconjunctival fever. CMV primarily affects immunocompromised patients, whereas pharyngoconjunctival fever is more common in immunocompetent individuals.
**Clinical Pearl:** Understanding the clinical presentation of pharyngoconjunctival fever is crucial for diagnosing and managing the infection in patients with fever and ocular symptoms. Differentiating between ocular herpes and other causes of fever and inflammation is important for appropriate treatment and patient care.