Why Do We Fall Ill?

AIDS (Acquired Immunodeficiency Syndrome) is primarily transmitted through sexual contact, along with other routes like blood transfusion and mother-to-child transmission. The other options - Cholera (water/food contamination), Typhoid (contaminated food/water), and Malaria (mosquito bite) - are not sexually transmitted diseases.

Dwarfism is the condition caused by deficiency of growth hormone (somatotropin) during childhood. Without adequate growth hormone, the body cannot grow to normal height. Gigantism results from excess growth hormone, cretinism from thyroid hormone deficiency, and anaemia from lack of red blood cells or hemoglobin - none of these are caused by growth hormone deficiency.

The AIDS virus (HIV) is NOT transmitted through casual contact like handshaking, hugging, or sharing utensils. It spreads through specific routes: sexual contact, blood-to-blood contact, and from mother to child during pregnancy, childbirth, or breastfeeding. Handshaking involves no exchange of bodily fluids necessary for HIV transmission.

Health is defined by the WHO as 'a state of complete physical, mental and social well-being and not merely the absence of disease'. A person with psychological tension is not considered truly healthy, even without a physical disease, because mental well-being is an essential component of overall health. Wealth and wisdom are unrelated to the health definition.

Penicillin is a classic antibiotic that works against bacteria by disrupting their cell wall synthesis, leading to bacterial death. Quinine and Chloroquine are antimalarial drugs (effective against protozoa, not bacteria), while Anti-Tetanus Serum is an antitoxin providing passive immunity rather than an antibiotic.

Chronic diseases, by definition, are long-lasting conditions (typically persisting for 3+ months or years). They often result in weight loss, fatigue, and restlessness. The statement that chronic diseases 'last for short duration' is incorrect - this contradicts the fundamental definition of 'chronic', which means continuing for a long time, unlike acute diseases which are short-term.

Sickle-cell anemia is caused by a genetic mutation that produces abnormal hemoglobin (HbS). When oxygen levels are low, this hemoglobin polymerizes and causes red blood cells to become rigid and sickle-shaped, unlike normal biconcave discs.

Drinking alcohol damages the liver, weakens the immune system, and increases risk of multiple diseases. In contrast, exercise, balanced diet, and hygiene all contribute to better health.

Infectious diseases are caused by pathogens (microbes) and manifest as symptoms when these microbes infect the body. Non-infectious and chronic diseases have other causes or develop gradually, not immediate microbial effects.

Vectors are organisms (like mosquitoes) that transmit pathogens from an infected person to a healthy host without being infected themselves. Viruses and bacteria are the microbes themselves, while hosts are the organisms harboring them.

Dengue fever is caused by a virus (Flavivirus), transmitted by Aedes mosquitoes. Typhoid, TB, and cholera are all bacterial diseases.

Hemophilia is a genetic disorder caused by X-linked recessive gene deficiency, not organ malfunction. Myopia is refractive error, kidney failure and cardiac failure involve organ malfunction.

Hygienic surroundings prevent the growth and spread of disease-causing microbes. Unclean and unhygienic environments promote pathogen proliferation, increasing infection risk.

Tuberculosis is caused by Mycobacterium tuberculosis (bacteria). AIDS (HIV), dengue, and common cold are all viral diseases. HIV causes AIDS through viral infection.

Worms (helminths) have complex life cycles and slower reproduction rates compared to fungi, bacteria, and viruses. Their generation time is much longer, so they multiply more slowly.

Drinking milk provides nutrition. Chewing tobacco and alcohol cause cancer and organ damage. Poverty and illiteracy indirectly harm health by limiting access to healthcare and health knowledge.

Anxiety is a mental health concern. When it occurs at inappropriate times (without real threat), it indicates poor mental health. A person with such symptoms is considered unhealthy, as health includes mental wellbeing.

A disease is identified and characterized by its symptoms, which are the noticeable changes or effects experienced by the patient. Symptoms help doctors recognize and diagnose specific diseases. Factors, causes, and cure are related concepts but symptoms are the primary identifying characteristics.

Chronic diseases are long-lasting health conditions that persist for extended periods, often for years or even a lifetime. These conditions lead to prolonged poor health and reduced quality of life. Acute diseases are short-term, while infectious and non-infectious refer to disease transmission rather than duration.

The immediate cause of an infectious disease is the pathogenic microbe that enters and multiplies in the body. Microbes such as bacteria, viruses, fungi, and protozoa are the direct agents that cause infectious diseases. Plants and animals can be vectors or sources, but the microbes themselves are the immediate cause.

Personal health and community health are interdependent - they affect and rely on each other. Individual health choices impact community health (like vaccination preventing spread), while community conditions (sanitation, pollution) affect personal health. This reciprocal relationship means they cannot be considered separately.

Elephantiasis is a chronic disease caused by parasitic worms that block lymphatic vessels, causing severe swelling and long-term disability. It persists for years and often requires lifelong management. Smallpox (now eradicated) was acute, while fever and cough are symptoms, not diseases themselves.

Municipal corporations are local government bodies responsible for providing public health services in communities, including sanitation, water supply, disease prevention programs, and health inspections. District administration oversees broader governance, while civilians and politicians are individuals, not service providers.

A defective gene is an internal factor because it originates within the organism's own genetic material. Internal factors include genetic predispositions, hormonal imbalances, and metabolic issues that originate inside the body. Extrinsic factors come from outside the body, like environment or lifestyle.

Immune dysfunction is an internal factor because it involves the body's own defense system malfunctioning from within. The other options - environmental pollution, drinking alcohol, and microorganisms - are external factors that come from outside the body. While viruses can cause immune issues, immune dysfunction itself is an internal problem.

Most skin infections like ringworm, athlete's foot, and fungal dermatitis are caused by fungi. While bacteria and viruses can also cause skin infections, fungal infections are among the most common. Mosquitoes are vectors that transmit diseases but don't directly cause skin infections.

Influenza is an acute disease that typically resolves within 1-2 weeks. Elephantiasis, ascariasis, and tuberculosis are chronic conditions that persist for long periods or require extended treatment.

Tuberculosis is a chronic disease that can last for months or years, even though it has acute phases. Headache, diarrhea, and common cold are acute conditions with short durations.

Bacteria have a cell wall made of peptidoglycan that provides structural support and protection. Cell membrane and plasma membrane are the same structure but lack the rigidity of a cell wall. Spores are dormant forms, not protective coatings.

Rabies is transmitted through the bite of infected animals like dogs, bats, or raccoons. Typhoid is food/water-borne, tetanus enters through wounds but is not specifically from animal bites, and AIDS is sexually transmitted or through blood.

Malaria is transmitted through mosquito bites (vector-borne), not through air. Common cold, pneumonia, and tuberculosis spread through airborne droplets when an infected person coughs or sneezes.

AIDS (HIV) is transmitted through sexual contact, blood transfusion, or from mother to child - not through air. Common cold, pneumonia, and tuberculosis spread through airborne respiratory droplets.

Influenza is an infectious disease caused by a virus, not a genetic disorder. Hemophilia, sickle-cell anemia, and night-blindness are genetic diseases caused by inherited gene mutations.

Syphilis is a sexually transmitted infection caused by the bacterium Treponema pallidum. Tetanus enters through wounds, diphtheria through respiratory droplets, and constipation is not a communicable disease.

Health is a comprehensive state of physical, mental, and social well-being, not merely the absence of disease. A person can be disease-free but still unhealthy due to poor mental health, stress, or social dysfunction. Therefore, being disease-free is not the same as being healthy.

Hemophilia is a genetic disorder that affects blood clotting and is inherited from parents, not caused by pathogens. Cholera, typhoid, and malaria are all infectious diseases caused by bacteria or parasites that spread from person to person or through vectors.