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Biology CBSE Live product
Class 8 (2025-26)
Health: The ultimate treasure
PTA Revision
9.
Vectorborne diseases
Question:
5
m.
Determine the disease and answer the following questions
Dengue
Malaria
Filariasis
Plague
Kala azar (leishmaniasis)
is a disease caused by the
Leishmania donovani
Yersinia pestis
Wuchereria bancrofti
dengue virus
parasite Plasmodium
which primarily infects the
lymphatic system and blocks the normal flow of lymph
spleen, liver, and bone marrow
blood and liver after entering the body through the skin
lymph nodes and can also affect the lungs
red blood cells and the liver after the parasite enters through the skin
. It shows symptoms such as a
high fever, swollen and painful lymph nodes (called buboes), and extreme weakness
high fever with chills, severe body aches, sweating, weakness, and in some cases bleeding gums or rashes
recurring fever with chills, excessive sweating, body weakness, and in severe cases, organ complications
severe swelling, especially in the legs and genitals, a condition commonly known as elephantiasis
prolonged fever, severe weight loss, weakness, and enlargement of the spleen and liver
. Prevention can be ensured through
controlling sandfly populations, using insecticide spraying, protective nets, and ensuring early diagnosis and treatment
using mosquito nets during sleep, applying insect repellents, and draining stagnant water to stop mosquito breeding
controlling rat and flea populations, maintaining proper sanitation,
mosquito populations, avoiding mosquito bites, and taking preventive drug treatments under health programs
sleeping under mosquito nets, applying insect repellents, and draining stagnant water to prevent mosquito breeding
to reduce transmission and complications.
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