Diseases, Conditions, Syndromes

WHO warns measles resurgent as Samoa deaths rise

The World Health Organisation warned of a "slide back" in global efforts to eliminate measles Tuesday, as the death toll from an outbreak that has killed dozens of children in Samoa continued to climb.

Diseases, Conditions, Syndromes

Bushmeat may breed deadly bacteria

People who eat wildebeests, wart hogs and other wild African animals may be at risk for contracting potentially life-threatening diseases, according to an international team of researchers. The team analyzed samples of bushmeat—meat ...

Diseases, Conditions, Syndromes

UN: Measles cases spike in numerous outbreaks worldwide

The World Health Organization says cases of measles are continuing to spike globally, with multiple large outbreaks being reported across Africa, Europe, Latin America and the Middle East.

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Infectious disease

An infectious disease is a clinically evident disease resulting from the presence of pathogenic microbial agents, including pathogenic viruses, pathogenic bacteria, fungi, protozoa, multicellular parasites, and aberrant proteins known as prions. These pathogens are able to cause disease in animals and/or plants. Infectious pathologies are usually qualified as contagious diseases (also called communicable diseases) due to their potential of transmission from one person or species to another. Transmission of an infectious disease may occur through one or more of diverse pathways including physical contact with infected individuals. These infecting agents may also be transmitted through liquids, food, body fluids, contaminated objects, airborne inhalation, or through vector-borne spread.

The term infectivity describes the ability of an organism to enter, survive and multiply in the host, while the infectiousness of a disease indicates the comparative ease with which the disease is transmitted to other hosts. An infection however, is not synonymous with an infectious disease, as an infection may not cause important clinical symptoms or impair host function.

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