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Infections typically begin in the throat or skin. The most striking sign is a strawberry-like rash. Examples of mild S. pyogenes infections include pharyngitis (strep throat) and localized skin infection . Erysipelas and cellulitis are characterized by multiplication and lateral spread of S. pyogenes in deep layers of the skin.
A subclinical infection—sometimes called a preinfection or inapparent infection—is an infection by a pathogen that causes few or no signs or symptoms of infection in the host. [1] Subclinical infections can occur in both humans and animals. [ 2 ]
Chain of infection; the chain of events that lead to infection. There is a general chain of events that applies to infections, sometimes called the chain of infection [15] or transmission chain. The chain of events involves several steps – which include the infectious agent, reservoir, entering a susceptible host, exit and transmission to new ...
The infection of B. pertussis occurs mostly in children under the age of one since this is when they are unimmunized, or children with faded immunity, normally around the ages 11 through 18. The signs and symptoms are similar to a common cold: runny nose, sneezing, mild cough, and low-grade fever. [30]
The following outline is provided as an overview of and topical guide to concepts related to infectious diseases in humans.. Infection – transmission, entry/invasion after evading/overcoming defense, establishment, and replication of disease-causing microscopic organisms (pathogens) inside a host organism, and the reaction of host tissues to them and to the toxins they produce.
Strep throat is a common bacterial infection in children. [2] It is the cause of 15–40% of sore throats among children [7] [13] and 5–15% among adults. [8] Cases are more common in late winter and early spring. [13] Potential complications include rheumatic fever and peritonsillar abscess. [1] [2]
Osteomyelitis, or bone infection, is a rare occurrence but has been seen in patients who were diagnosed to have a S. pneumoniae infection that went untreated for too long. [31] Sepsis is caused by overwhelming response to an infection and leads to tissue damage, organ failure, and even death. The symptoms include confusion, shortness of breath ...
Yaws primarily affects children, with up to 80% of cases in those under 15 years of age, and peak incidence in children aged six to ten. [10] Boys and girls are impacted equally. [10] It is more common in remote areas, where access to treatment is poorer. [13] It is associated with poverty and poor sanitation facilities and personal hygiene. [8 ...