1. The infectious stage of malaria is (d) Sporozoite. Sporozoites are the form of the malaria parasite transmitted to humans through the bite of infected mosquitoes. When an infected mosquito bites a person, it injects sporozoites into the bloodstream. From there, sporozoites travel to the liver, whereRead more

    The infectious stage of malaria is (d) Sporozoite. Sporozoites are the form of the malaria parasite transmitted to humans through the bite of infected mosquitoes. When an infected mosquito bites a person, it injects sporozoites into the bloodstream. From there, sporozoites travel to the liver, where they invade liver cells and multiply, initiating the infection cycle. After replication in the liver, sporozoites develop into merozoites, which are released into the bloodstream, infecting red blood cells and causing symptoms of malaria. Thus, while merozoites are responsible for the symptomatic phase, sporozoites initiate the infection by entering the host’s bloodstream.

    See less
    • 4
  2. The fungal disease among the options is (c) Ringworm. Powdery mildew, typically affecting plants, is caused by fungal pathogens. Eczema, a skin condition, results from various factors such as genetics and environmental triggers, not fungi. Elephantiasis, caused by parasitic worms transmitted by mosqRead more

    The fungal disease among the options is (c) Ringworm. Powdery mildew, typically affecting plants, is caused by fungal pathogens. Eczema, a skin condition, results from various factors such as genetics and environmental triggers, not fungi. Elephantiasis, caused by parasitic worms transmitted by mosquitoes, isn’t fungal. Ringworm, contrary to its name, is a fungal infection of the skin or scalp. It’s characterized by circular, red, scaly patches that resemble a ring, caused by dermatophyte fungi. Proper antifungal treatment is essential to manage and resolve ringworm infections effectively.

    See less
    • 4
  3. Chickenpox is caused by a virus, specifically the varicella-zoster virus (VZV). This virus belongs to the herpesvirus family. It's highly contagious and spreads through respiratory droplets or direct contact with the rash of an infected person. Variola virus, associated with smallpox, is not responsRead more

    Chickenpox is caused by a virus, specifically the varicella-zoster virus (VZV). This virus belongs to the herpesvirus family. It’s highly contagious and spreads through respiratory droplets or direct contact with the rash of an infected person. Variola virus, associated with smallpox, is not responsible for chickenpox. Streptococcus bacteria cause various infections but not chickenpox. Vibrio cholerae causes cholera, a bacterial infection characterized by severe diarrhea. Understanding the viral nature of chickenpox is crucial for developing effective prevention strategies and treatments against this common childhood illness.

    See less
    • 4
  4. The term 'Black Death' refers to Plague. This infamous pandemic, occurring predominantly in the 14th century, was caused by the bacterium Yersinia pestis. It resulted in devastating mortality rates across Europe and Asia, leading to millions of deaths. The term 'Black Death' originated from the darkRead more

    The term ‘Black Death’ refers to Plague. This infamous pandemic, occurring predominantly in the 14th century, was caused by the bacterium Yersinia pestis. It resulted in devastating mortality rates across Europe and Asia, leading to millions of deaths. The term ‘Black Death’ originated from the darkened appearance of the skin caused by hemorrhages under the skin in advanced stages of the disease. Unlike cancer (a), AIDS (c), and malaria (d), which are caused by different pathogens and have distinct modes of transmission, the Black Death specifically denotes the historical plague pandemic caused by Yersinia pestis.

    See less
    • 4
  5. Due to dengue fever, the deficiency in the human body primarily involves (a) platelets. Dengue fever often leads to thrombocytopenia, a condition characterized by a low platelet count. Platelets are essential for blood clotting, and their reduction can result in bleeding tendencies, leading to hemorRead more

    Due to dengue fever, the deficiency in the human body primarily involves (a) platelets. Dengue fever often leads to thrombocytopenia, a condition characterized by a low platelet count. Platelets are essential for blood clotting, and their reduction can result in bleeding tendencies, leading to hemorrhagic complications in severe cases of dengue. While dengue fever can cause dehydration due to high fever and fluid loss through sweating, it doesn’t typically result in a deficiency of (d) water. Moreover, it doesn’t directly affect (b) hemoglobin levels or (c) sugar levels in the body.

    See less
    • 4