7. Which of the following is classified as a noninfectious disease?
Answer: B
Psoriasis is classified as a noninfectious disease.
Psoriasis is a chronic autoimmune condition that causes rapid skin cell production, resulting in scaling and inflammation. Unlike infectious diseases, which are caused by pathogens, psoriasis is not contagious and does not spread from person to person.
A) Dengue
Dengue is a viral infection transmitted by mosquitoes, making it an infectious disease. It is characterized by high fever, severe headache, pain behind the eyes, and joint and muscle pain, clearly indicating its nature as an infectious disease.
B) Psoriasis
Psoriasis is indeed classified as a noninfectious disease. It results from an immune system dysfunction that leads to skin cell overproduction, manifesting in red, scaly patches on the skin. This condition is not caused by any infectious agent and does not spread between individuals.
C) Chikungunya
Chikungunya is another viral infection spread by mosquito bites, similar to dengue. It causes fever and severe joint pain, categorizing it clearly as an infectious disease due to its transmission through vectors.
D) Brucellosis
Brucellosis is a bacterial infection that results from exposure to infected animals or consumption of contaminated animal products. This disease is classified as infectious because it is caused by the Brucella bacteria and can be transmitted to humans.
Conclusion
Psoriasis is the correct answer as it exemplifies a noninfectious disease characterized by an autoimmune response rather than an infection. All other options, including dengue, chikungunya, and brucellosis, are infectious diseases caused by various pathogens and can spread through different modes of transmission. This distinction is crucial in understanding the nature of diseases and their classifications.