Parvovirus B19 infects only humans. You can have a range of symptoms depending on your age and overall health. About two out of 10 people who get infected with this virus will have no symptoms. Others may have only mild, rash illness. Parvovirus B19 most commonly causes fifth disease.Infection is the invasion of an organism's body tissues by disease-causing agents, their multiplication, and the reaction of host tissues to the infectious agents and the toxins they produce. Infectious disease, also known as transmissible disease or communicable disease, is illness resulting from an infection. Infections are caused by infectious agents including.Serratia marcescens (/ s ə ˈ r eɪ ʃ i ə m ɑːr ˈ s ɛ s ɪ n z /) [not in citation given] is a species of rod-shaped, Gram-negative bacteria, that is also a facultative anaerobic organism, classified as an opportunistic pathogen in the family Enterobacteriaceae.It was discovered in 1819 by Bartolomeo Bizio in Padua, Italy. S. marcescens is commonly involved in hospital-acquired.The global impact of roundworm. Roundworms are a serious health problem in parts of the developing world. Many poorer people do not have access to healthcare so a roundworm infection can quickly become serious.
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