Bacillus anthracis |
Bacterium |
Human |
Infection |
Spore formation |
Severe illness, potential death |
Inhalation, ingestion, cutaneous |
Escherichia coli O157:H7 |
Bacterium |
Human |
Infection |
Shiga toxin production |
Gastroenteritis |
Foodborne, waterborne |
Staphylococcus aureus |
Bacterium |
Human |
Infection |
Toxin production |
Skin infections, food poisoning |
Direct contact, aerosol |
Streptococcus pneumoniae |
Bacterium |
Human |
Infection |
Capsule production |
Pneumonia, meningitis |
Person-to-person |
Clostridium tetani |
Bacterium |
Human |
Toxin production |
Neurotoxin production |
Tetanus |
Wound contamination |
Plasmodium falciparum |
Protozoan |
Human |
Parasitemia |
Invasion of red blood cells |
Malaria |
Mosquito bite |
Human Immunodeficiency Virus |
Virus |
Human |
Infection |
Targeting CD4+ T cells |
AIDS |
Sexual contact, blood exposure |
Influenza virus |
Virus |
Human |
Infection |
Cellular entry via HA |
Respiratory illness |
Aerosol transmission |
Zika virus |
Virus |
Human |
Infection |
Neurotropism |
Fetal abnormalities, fever |
Mosquito bite, sexual contact |
Salmonella enterica |
Bacterium |
Human |
Infection |
Invasion of intestinal cells |
Gastroenteritis |
Foodborne, waterborne |
Helicobacter pylori |
Bacterium |
Human |
Infection |
Urease production |
Peptic ulcers, gastric cancer |
Oral-oral, fecal-oral |
Neisseria meningitidis |
Bacterium |
Human |
Infection |
Polysaccharide capsule |
Meningitis, sepsis |
Respiratory droplets |
Vibrio cholerae |
Bacterium |
Human |
Infection |
Cholera toxin production |
Severe diarrhea, dehydration |
Waterborne |
Human Papillomavirus |
Virus |
Human |
Infection |
Oncogenic potential |
Cervical cancer |
Sexual contact |
Rabies virus |
Virus |
Human |
Infection |
Neuroinvasion |
Rabies |
Animal bite |
Chlamydia trachomatis |
Bacterium |
Human |
Infection |
Intracellular replication |
STI, infertility |
Sexual contact |
Borrelia burgdorferi |
Bacterium |
Human |
Infection |
Spiral shape, motility |
Lyme disease |
Tick bite |
Candida albicans |
Fungus |
Human |
Infection |
Biofilm formation |
Candidiasis |
Opportunistic, endogenous |
Brucella spp. |
Bacterium |
Human |
Infection |
Intracellular replication |
Brucellosis |
Ingestion of contaminated food |
Mycobacterium tuberculosis |
Bacterium |
Human |
Infection |
Slow growth, cell wall lipids |
Tuberculosis |
Airborne |
Trichomonas vaginalis |
Protozoan |
Human |
Infection |
Flagellar motility |
Trichomoniasis |
Sexual contact |
Zygomycetes |
Fungus |
Human |
Infection |
Angioinvasion |
Mucormycosis |
Opportunistic, inhalation |
Chikungunya virus |
Virus |
Human |
Infection |
Replication in muscle cells |
Fever, arthralgia |
Mosquito bite |
Dengue virus |
Virus |
Human |
Infection |
Affects endothelial cells |
Dengue fever |
Mosquito bite |
Rhinovirus |
Virus |
Human |
Infection |
Receptor-mediated endocytosis |
Common cold |
Aerosol transmission |
Adenovirus |
Virus |
Human |
Infection |
Viral replication |
Respiratory infections, conjunctivitis |
Aerosol, fomites |
West Nile virus |
Virus |
Human |
Infection |
Neuroinvasive potential |
Encephalitis |
Mosquito bite |
Ebola virus |
Virus |
Human |
Infection |
Direct viral replication in host |
Hemorrhagic fever |
Contact with bodily fluids |
SARS-CoV-2 |
Virus |
Human |
Infection |
Spike protein-mediated entry |
COVID-19 |
Airborne, contact |
Yersinia pestis |
Bacterium |
Human |
Infection |
Type III secretion system |
Bubonic plague |
Flea bite, respiratory droplet |
Listeria monocytogenes |
Bacterium |
Human |
Infection |
Intracellular growth |
Gastroenteritis, meningitis |
Foodborne |
Shigella flexneri |
Bacterium |
Human |
Infection |
Shiga toxin production |
Dysentery |
Fecal-oral transmission |
Enterobius vermicularis |
Helminth |
Human |
Infection |
Egg transmission |
Pinworm infection |
Fecal-oral transmission |
Clonorchis sinensis |
Helminth |
Human |
Infection |
Liver damage |
Choleriasis |
Foodborne (eating raw fish) |
Schistosoma mansoni |
Helminth |
Human |
Infection |
Invasion through skin |
Schistosomiasis |
Contact with contaminated water |
Trypanosoma brucei |
Protozoan |
Human |
Infection |
CNS invasion |
African sleeping sickness |
Tsetse fly bite |
Entamoeba histolytica |
Protozoan |
Human |
Infection |
Tissue invasion |
Amoebic dysentery |
Fecal-oral transmission |
Streptococcus pyogenes |
Bacterium |
Human |
Infection |
M protein evasion |
Pharyngitis, necrotizing fasciitis |
Direct contact, respiratory droplets |
Coxsackievirus |
Virus |
Human |
Infection |
Cytolytic activity |
Hand, foot, and mouth disease |
Fecal-oral route |
Parvovirus B19 |
Virus |
Human |
Infection |
Bone marrow infection |
Fifth disease |
Respiratory secretions |
Hepatitis A virus |
Virus |
Human |
Infection |
Oral-fecal route |
Hepatitis |
Fecal-oral transmission |
Hepatitis B virus |
Virus |
Human |
Infection |
Chronic liver infection |
Hepatitis, cancer |
Blood, sexual contact |
Hepatitis C virus |
Virus |
Human |
Infection |
Chronic liver infection |
Hepatitis, liver failure |
Blood, sexual contact |
Cryptosporidium parvum |
Protozoan |
Human |
Infection |
Intracellular parasitism |
Cryptosporidiosis |
Waterborne, fecal-oral |
Neisseria gonorrhoeae |
Bacterium |
Human |
Infection |
Hormonal modulation |
Gonorrhea |
Sexual contact |
Legionella pneumophila |
Bacterium |
Human |
Infection |
Intracellular growth |
Legionnaires' disease |
Aerosol transmission |
Yersinia enterocolitica |
Bacterium |
Human |
Infection |
Invasion of mucosa |
Gastroenteritis |
Foodborne |
Francisella tularensis |
Bacterium |
Human |
Infection |
Intracellular replication |
Tularemia |
Direct contact, vector-borne |
Chlamydophila psittaci |
Bacterium |
Human |
Infection |
Intracellular replication |
Psittacosis |
Aerosol transmission |
Hantavirus |
Virus |
Human |
Infection |
Vascular permeability |
Hantavirus pulmonary syndrome |
Rodent excretions |
Q fever (Coxiella burnetii) |
Bacterium |
Human |
Infection |
Intracellular survival |
Q fever |
Aerosol transmission |
Fusobacterium necrophorum |
Bacterium |
Human |
Infection |
Toxin production |
Lemierre's syndrome |
Normal flora opportunistic |
Pseudomonas aeruginosa |
Bacterium |
Human |
Infection |
Biofilm formation |
Pulmonary infections |
Opportunistic pathogen |
Clostridium difficile |
Bacterium |
Human |
Infection |
Toxin A and B production |
Antibiotic-associated diarrhea |
Fecal-oral route |
Treponema pallidum |
Bacterium |
Human |
Infection |
Intracellular survival |
Syphilis |
Sexual contact |
Anaplasma phagocytophilum |
Bacterium |
Human |
Infection |
Intracellular replication |
Human granulocytic anaplasmosis |
Tick bite |
Neorickettsia sennetsu |
Bacterium |
Human |
Infection |
Intracellular replication |
Sennetsu fever |
Contact with water contaminated by fish |
Chlamydia psittaci |
Bacterium |
Human |
Infection |
Intracellular replication |
Psittacosis |
Aerosols from infected birds |
Rickettsia rickettsii |
Bacterium |
Human |
Infection |
Intracellular replication |
Rocky Mountain spotted fever |
Tick bite |
Enterobacter sakazakii |
Bacterium |
Human |
Infection |
Neonatal infections |
Meningitis |
Contaminated infant formula |
Bradyhizobium spp. |
Bacterium |
Plant |
Symbiosis |
Nitrogen fixation |
Improved growth in legumes |
Root nodules formation |
Rhizobium spp. |
Bacterium |
Plant |
Symbiosis |
Nitrogen fixation |
Enhanced nutrient uptake |
Root nodules of legumes |
Agrobacterium tumefaciens |
Bacterium |
Plant |
Genetic transformation |
Crown gall disease |
Tumor-like growth |
Plant wound infection |
Mycobacterium leprae |
Bacterium |
Human |
Infection |
Slow replication |
Leprosy |
Prolonged close contact |
Orientia tsutsugamushi |
Bacterium |
Human |
Infection |
Intracellular growth |
Scrub typhus |
Rodent mites |
Histoplasma capsulatum |
Fungus |
Human |
Infection |
Intracellular growth |
Histoplasmosis |
Aerosol transmission from bird droppings |
Blastomyces dermatitidis |
Fungus |
Human |
Infection |
Inhalation of spores |
Blastomycosis |
Aerosol transmission |
Coccidioides immitis |
Fungus |
Human |
Infection |
Inhalation of arthroconidia |
Valley fever |
Aerosol transmission |
Paracoccidioides brasiliensis |
Fungus |
Human |
Infection |
Inhalation of spores |
Paracoccidioidomycosis |
Aerosol transmission |
Cryptococcus neoformans |
Fungus |
Human |
Infection |
Encapsulation |
Meningitis |
Aerosol transmission from bird feces |
Penicillium marneffei |
Fungus |
Human |
Infection |
Intracellular growth |
Penicilliosis |
Aerosol transmission in endemic areas |
Candida auris |
Fungus |
Human |
Infection |
Drug resistance |
Invasive candidiasis |
Direct contact |
Nocardia asteroides |
Bacterium |
Human |
Infection |
Opportunistic pathogen |
Nocardiosis |
Inhalation, contamination of wounds |
Acanthamoeba castellanii |
Protozoan |
Human |
Infection |
Contact lens contamination |
Acanthamoeba keratitis |
Direct contact with contaminated water |
Varicella-zoster virus |
Virus |
Human |
Infection |
Latency in neurons |
Chickenpox, shingles |
Respiratory droplets |
Cytomegalovirus |
Virus |
Human |
Infection |
Cell-mediated immunity evasion |
Congenital infections |
Saliva, transplants |
Venezuelan equine encephalitis virus |
Virus |
Human |
Infection |
Neurotropic infection |
Encephalitis |
Mosquito bite |
Junin virus |
Virus |
Human |
Infection |
Zoonotic transmission |
Argentine hemorrhagic fever |
Contact with rodent excretions |
Marburg virus |
Virus |
Human |
Infection |
Infects multiple cell types |
Marburg virus disease |
Contact with bodily fluids |
Nipah virus |
Virus |
Human |
Infection |
Direct viral replication |
Nipah virus infection |
Fruit bats, contaminated food |
Crimean-Congo hemorrhagic fever virus |
Virus |
Human |
Infection |
Invasion of endothelial cells |
CCHF |
Tick bites, contact |
Rift Valley fever virus |
Virus |
Human |
Infection |
Zoonotic transmission |
Rift valley fever |
Mosquito bites, livestock contact |
Blue tongue virus |
Virus |
Animal |
Infection |
Vascular damage |
Bluetongue disease |
Insect bites (biting midges) |
Foot-and-mouth disease virus |
Virus |
Animal |
Infection |
Cell lysis |
Vesicular disease in cloven-hoofed animals |
Contact, aerosol |
Classical swine fever virus |
Virus |
Animal |
Infection |
Immunosuppression |
Hog cholera |
Contact with infected animals |
Avian influenza virus |
Virus |
Animal |
Infection |
Respiratory infection |
Bird flu |
Contact with infected birds |
Porcine reproductive and respiratory syndrome virus |
Virus |
Animal |
Infection |
Types of immune evasion |
PRRS |
Aerosol, contact |
Newcastle disease virus |
Virus |
Animal |
Infection |
Viral replication in lungs |
Respiratory disease in birds |
Contact, aerosol |
Marek's disease virus |
Virus |
Animal |
Infection |
Changes in lymphocytes |
Lymphoid tumors in poultry |
Contact with infected birds |
Canine parvovirus |
Virus |
Animal |
Infection |
Rapid replication in dividing cells |
Vomiting, diarrhea |
Contact with infected feces |
Feline leukemia virus |
Virus |
Animal |
Infection |
Immunosuppression |
Feline leukemia |
Bite, grooming |
Lentivirus |
Virus |
Animal |
Infection |
Infection of immune cells |
Feline immunodeficiency virus |
Bite, grooming |
Canine distemper virus |
Virus |
Animal |
Infection |
Neurological involvement |
Distemper in dogs |
Contact, aerosol |
Rabies virus |
Virus |
Animal |
Infection |
Neurotropic infection |
Rabies in mammals |
Bite from infected animals |
Western equine encephalitis virus |
Virus |
Animal |
Infection |
Neurotropic strain |
Western equine encephalitis |
Mosquito bite |
Japanese encephalitis virus |
Virus |
Animal |
Infection |
Neuroinvasion |
Japanese encephalitis |
Mosquito bite |
Equine encephalitis virus |
Virus |
Animal |
Infection |
Neuroinvasive potential |
Equine encephalitis |
Mosquito transmission |
Severe acute respiratory syndrome virus |
Virus |
Human |
Infection |
Respiratory distress |
SARS |
Respiratory droplets |
MERS-CoV |
Virus |
Human |
Infection |
Respiratory infection |
Middle East respiratory syndrome |
Contact, aerosol |
Rising virus |
Virus |
Human |
Infection |
Promotes immune evasion |
Rising disease |
Vector transmission |
Chlamydia psittaci |
Bacterium |
Human |
Infection |
Intracellular replication |
Psittacosis |
Aerosol from bird droppings |
Stenotrophomonas maltophilia |
Bacterium |
Human |
Infection |
Biofilm production |
Pulmonary infections |
Opportunistic pathogen |
Acinetobacter baumannii |
Bacterium |
Human |
Infection |
Multidrug resistance |
Nosocomial infections |
Direct contact |
Salmonella typhi |
Bacterium |
Human |
Infection |
Typhoid toxin production |
Typhoid fever |
Fecal-oral transmission |
Toxoplasma gondii |
Protozoan |
Human |
Infection |
Intracellular growth |
Toxoplasmosis |
Fecal-oral, zoonotic |
Mycoplasma pneumoniae |
Bacterium |
Human |
Infection |
Adhesion to respiratory epithelium |
Atypical pneumonia |
Respiratory droplets |
Propionibacterium acnes |
Bacterium |
Human |
Infection |
Biofilm formation |
Acne vulgaris |
Normal skin flora |
Rickettsia prowazekii |
Bacterium |
Human |
Infection |
Intracellular replication |
Epidemic typhus |
Louse bites |
Anaplasma phagocytophilum |
Bacterium |
Human |
Infection |
Evasion of immune response |
Human granulocytic anaplasmosis |
Tick bite |
Chlamydia caviae |
Bacterium |
Human |
Infection |
Intracellular replication |
Respiratory infections |
Indirect contact with guinea pigs |
Adenovirus 5 |
Virus |
Human |
Infection |
Receptor-mediated endocytosis |
Conjunctivitis, respiratory infections |
Fomites, aerosol |
Rhinovirus 14 |
Virus |
Human |
Infection |
Infection of upper respiratory tract |
Common cold |
Aerosol, contact |
Multidrug-resistant Mycobacterium tuberculosis |
Bacterium |
Human |
Infection |
Drug resistance mechanisms |
Multidrug-resistant tuberculosis |
Airborne |
Campylobacter jejuni |
Bacterium |
Human |
Infection |
S-shaped form enhances mobility |
Gastroenteritis |
Foodborne, waterborne |
Clostridium perfringens |
Bacterium |
Human |
Infection |
Toxin production |
Food poisoning |
Foodborne |
Bordetella pertussis |
Bacterium |
Human |
Infection |
Toxin production |
Whooping cough |
Airborne |
Equine herpesvirus 1 |
Virus |
Animal |
Infection |
Respiratory infection |
Equine abortion |
Contact, aerosol |
Equine influenza virus |
Virus |
Animal |
Infection |
Respiratory disease |
Equine influenza |
Contact, aerosol |
Canine coronavirus |
Virus |
Animal |
Infection |
Gastrointestinal illness |
Canine enteritis |
Contact, fecal-oral |
Feline infectious peritonitis virus |
Virus |
Animal |
Infection |
Immune response dysregulation |
FIP |
Contact, aerosol |
Porcine parvovirus |
Virus |
Animal |
Infection |
Reproductive failure |
Porcine reproductive disease |
Contact, aerosol |
Adenovirus 2 |
Virus |
Animal |
Infection |
Causes respiratory disease |
Kennel cough |
Contact, aerosol |
Leptospira interrogans |
Bacterium |
Human |
Infection |
Invasion of tissues |
Leptospirosis |
Waterborne, zoonotic |
Borrelia hermsii |
Bacterium |
Human |
Infection |
Direct bloodstream invasion |
Relapsing fever |
Tick bite |
Yersinia pestis (flea-borne) |
Bacterium |
Human |
Infection |
Intracellular growth |
Plague |
Flea bites |
Toxocara canis |
Helminth |
Human |
Infection |
Visceral larva migrans |
Toxocariasis |
Fecal-oral transmission |
Enterobius vermicularis (pinworm) |
Helminth |
Human |
Infection |
Egg ingestion |
Pinworm infection |
Fecal-oral transmission |
Pneumocystis jirovecii |
Fungus |
Human |
Infection |
Opportunistic pathogen |
Pneumocystis pneumonia |
Aerosol transmission |
Giardia lamblia |
Protozoan |
Human |
Infection |
Fecal-oral transmission |
Giardiasis |
Waterborne, fecal-oral |
Babesia microti |
Protozoan |
Human |
Infection |
Invasion of red blood cells |
Babesiosis |
Tick bite |
Cryptosporidium hominis |
Protozoan |
Human |
Infection |
Intracellular growth in intestine |
Cryptosporidiosis |
Waterborne, fecal-oral |
Legionella longbeachae |
Bacterium |
Human |
Infection |
Aerosolized bacteria |
Legionnaires' disease |
Contact with contaminated water |
Bartonella henselae |
Bacterium |
Human |
Infection |
Intracellular growth |
Cat scratch fever |
Cat scratches or bites |
Francisella tularensis (e.g., type A) |
Bacterium |
Human |
Infection |
Intracellular growth |
Tularemia |
Contact with infected animals |
Hepatitis D virus |
Virus |
Human |
Infection |
Requires co-infection with HBV |
Severe liver disease |
Blood, sexual contact |
Hantaan virus |
Virus |
Human |
Infection |
Infiltration of pulmonary cells |
Hemorrhagic fever |
Rodent excrement |
Junin virus |
Virus |
Human |
Infection |
Zoonotic disease transmission |
Argentine hemorrhagic fever |
Contact with infected rodents |
Machupo virus |
Virus |
Human |
Infection |
Severely infects blood vessels |
Bolivian hemorrhagic fever |
Contact with infected rodents |
Sabia virus |
Virus |
Human |
Infection |
Receptor-mediated entry into cells |
Hemorrhagic fever |
Contact with wild animals |
Trichinella spiralis |
Helminth |
Human |
Infection |
Ingestion of larvae in undercooked meat |
Trichinosis |
Foodborne |
Echinococcus granulosus |
Helminth |
Human |
Infection |
Formation of cysts |
Hydatid disease |
Fecal-oral, zoonotic |
Echinococcus multilocularis |
Helminth |
Human |
Infection |
Formation of multivesicular cysts |
Alveolar echinococcosis |
Zoonotic |