Health topics
Infectious diseases
Browse bacterial, viral, fungal and parasitic diseases.
Overview
About infectious diseases
Infectious diseases are caused by pathogens, including viruses, bacteria, fungi and parasites. This topic groups selected diseases by organism or clinical pattern, but their transmission, prevention and treatment differ. It also includes an explanation of droplet precautions as an infection-control reference, not as a disease.
Viral infections
5 references
COVID-19
Condition→COVID-19Evidence-based condition reference.
Influenza (flu)
Condition→Influenza (flu)Abrupt viral respiratory illness, high-risk complications, molecular testing, antivirals and seasonal vaccination.
Chickenpox (varicella)
Explore symptoms, diagnosis, care and cited clinical information in the full condition article.
Polio (poliomyelitis)
Explore symptoms, diagnosis, care and cited clinical information in the full condition article.
HIV infection and AIDS
Condition→HIV infection and AIDSHIV diagnosis, viral load and CD4 monitoring, universal ART, AIDS, U=U and long-term prevention-focused care.
Bacterial infections
9 references
Tuberculosis
Condition→TuberculosisTuberculosis symptoms, rapid diagnosis, drug resistance, combination treatment, prevention and TB/HIV care.
Pertussis (whooping cough)
Explore symptoms, diagnosis, care and cited clinical information in the full condition article.
Cholera
Condition→CholeraEvidence-based condition reference.
Campylobacteriosis
Explore symptoms, diagnosis, care and cited clinical information in the full condition article.
Gonorrhea
Explore symptoms, diagnosis, care and cited clinical information in the full condition article.
Chlamydia
Condition→ChlamydiaAsymptomatic chlamydial infection, NAAT testing, antibiotic treatment, partner management, pregnancy and follow-up.
Epiglottitis
Explore symptoms, diagnosis, care and cited clinical information in the full condition article.
Erythrasma
Explore symptoms, diagnosis, care and cited clinical information in the full condition article.
Ehrlichiosis
Explore symptoms, diagnosis, care and cited clinical information in the full condition article.
Fungal infections
3 references
Aspergillosis
Condition→AspergillosisAllergic, chronic, fungal-ball and invasive Aspergillus disease with risk-based diagnosis and subtype-specific treatment.
Coccidioidomycosis (Valley fever)
Explore symptoms, diagnosis, care and cited clinical information in the full condition article.
Blastomycosis
Explore symptoms, diagnosis, care and cited clinical information in the full condition article.
Parasitic infections
5 references
Malaria
Condition→MalariaMalaria symptoms, parasite-based diagnosis, severe disease, antimalarial treatment, prevention and vaccines.
Amebiasis
Explore symptoms, diagnosis, care and cited clinical information in the full condition article.
Ascariasis
Condition→AscariasisAscaris roundworm infection: fecal-soil transmission, pulmonary migration, stool diagnosis, deworming and obstruction risks.
Clonorchiasis
Explore symptoms, diagnosis, care and cited clinical information in the full condition article.
Trichomoniasis
Explore symptoms, diagnosis, care and cited clinical information in the full condition article.
Related infection-control information
1 reference
For diagnosis, treatment information and clinical sources, see the individual condition references. This page is a topical directory, not a clinical care guide.