Human Diseases
Disease impairs normal body function and can be classified by occurrence, infectious status, causative pathogen and route of transmission.
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Human Disease: Definition, Classification and Transmission
Disease impairs normal body function and can be classified by occurrence, infectious status, causative pathogen and route of transmission.
Open article →Airborne Diseases and Tuberculosis
Airborne bacteria and viruses travel in droplets, dust or spores; tuberculosis is a communicable bacterial disease that mainly affects the lungs.
Open article →Waterborne Diseases and Hepatitis A
Contaminated food, water and oral transmission carry Hepatitis A virus and intestinal infections, producing liver inflammation or fluid loss.
Open article →Vector-Borne Malaria and Dengue
Mosquito vectors carry different pathogens: female Anopheles transmits malaria parasites, while infected Aedes aegypti transmits dengue virus.
Open article →Protozoan Diseases: Amoebiasis and Sleeping Sickness
Amoebiasis trophozoites damage the colon and spread through contamination, while tsetse flies transmit Trypanosoma sleeping sickness.
Open article →Ringworm, Ascariasis and Filariasis
Fungal ringworm spreads through contaminated materials, Ascaris eggs through food or water, and filarial worms through female Culex mosquitoes.
Open article →Sexually Transmitted Diseases and AIDS
HIV is a retrovirus that attacks T lymphocytes and spreads through sexual contact, infected blood, needles or mother-to-foetus transmission.
Open article →Vaccination and Immunization
Vaccines made from living, killed or weakened microbes or their products stimulate protection; broad immunization also limits community transmission.
Open article →Drug Addiction, Dependence and Health Effects
Repeated drug or alcohol use can cause tolerance, addiction, psychological and physical dependence, withdrawal and long-term organ damage.
Open article →Mental Health and Depression
Positive mental health supports wellbeing; depression affects mood, interest, sleep, appetite, energy and concentration, and benefits from support.
Open article →Lifestyle and Non-Communicable Disorders
Smoking, alcohol, drug abuse, high-fat diets and inactivity contribute to diabetes, cardiovascular, lung and other non-communicable disorders.
Open article →Article access
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