Oncohema Key

Bronchiolitis Droplet Precautions Contact Precautions Bronchiolitis, an inflammation of the lung bronchioles, usually results from a viral infection and can lead to severe illness. This infection usually affects children younger…

Bordetella Pertussis Infection Droplet Precautions The microorganism B. pertussis is a gram-negative, pleomorphic bacillus that causes an infection of the respiratory tract. Commonly known as whooping cough or pertussis, this…

Botulism Caused by the gram-positive, anaerobic bacteria Clostridium botulinum, botulism is a rare but severe form of poisoning. C. botulinum is found in soil and untreated water worldwide. The bacteria…

Basidiobolomycosis Basidiobolomycosis, a form of zygomycosis caused by the fungus Basidiobolus ranarum, was first isolated in 1955. It is also known as Entomophthoramycosis basidiobolae. This fungus is found worldwide in…

Bartonella Quintana Infection Contact Precautions Bartonella quintana, a gram-negative rod belonging to the Rickettsiaceae family, restricts itself to human hosts. Typically transmitted by the human body louse (a small, wingless…

Aspergillosis Aspergillosis is an opportunistic infection caused by fungi of the genus Aspergillus, usually A. fumigatus, A. flavus, and A. niger. Aspergillosis occurs in four major forms: aspergilloma, which produces…

Anthrax Anthrax, also called wool-sorter’s disease or ragpicker’s disease, is an acute bacterial infection that occurs most commonly in hoofed animals, such as cattle, sheep, goats, and horses. It can…

Amebiasis Amebiasis, also known as amebic dysentery or intestinal amebiasis, is an acute or chronic protozoal infection caused by Entamoeba histolytica. This infection produces varying degrees of illness, from no…

Adenovirus Infection Droplet Precautions Contact Precautions Adenoviruses are a group of viruses that infect the tissue lining the respiratory tract, eyes, intestines, and urinary tract. They cause acute, self-limiting, febrile…

Actinomycosis Actinomycosis is a subacute-chronic bacterial infection primarily caused by the gram-positive anaerobic bacillus Actinomyces israelii, which produces granulomatous and suppurative lesions with multiple abscesses. Common sites for infection are…