Which type of mycoses causes no cellular response by the host?

Which type of mycoses causes no cellular response by the host?

• A. Systemic mycoses
• B. Superficial mycoses
• C. Subcutaneous mycoses
• D. Opportunistic mycoses

Answer: (B)

Superficial mycoses are indeed characterized by a minimal host immune response and are primarily localized to the outermost layers of the skin and hair. These types of fungal infections, such as tinea versicolor caused by Malassezia species, infect the keratinized layers of the skin without penetrating deeper tissues or invading the immune system. As a result, they often produce no significant inflammatory response, allowing the host to sometimes remain unaware of the infection. Other types of mycoses, such as systemic, subcutaneous, and opportunistic mycoses, typically provoke a more pronounced immune response due to their deeper tissue involvement or the immune system's activation against them. For example, systemic mycoses can cause significant illness and lead to immune responses in inner organs, while opportunistic mycoses can exploit weakened immune systems and provoke strong reactions. Thus, superficial mycoses are distinct because they involve non-invasive organisms that do not elicit significant cellular reactions from the host's immune system, making them the correct choice for this question.

Superficial mycoses are indeed characterized by a minimal host immune response and are primarily localized to the outermost layers of the skin and hair. These types of fungal infections, such as tinea versicolor caused by Malassezia species, infect the keratinized layers of the skin without penetrating deeper tissues or invading the immune system. As a result, they often produce no significant inflammatory response, allowing the host to sometimes remain unaware of the infection.

Other types of mycoses, such as systemic, subcutaneous, and opportunistic mycoses, typically provoke a more pronounced immune response due to their deeper tissue involvement or the immune system's activation against them. For example, systemic mycoses can cause significant illness and lead to immune responses in inner organs, while opportunistic mycoses can exploit weakened immune systems and provoke strong reactions.

Thus, superficial mycoses are distinct because they involve non-invasive organisms that do not elicit significant cellular reactions from the host's immune system, making them the correct choice for this question.