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Affected children always present with persistent fever. [7] Other clinical features at presentation vary. [50] [14] In contrast to acute COVID-19, most children have gastrointestinal symptoms, such as diarrhoea, vomiting, and intense abdominal pain (sometimes severe enough to suggest appendicitis). [7]
Adenovirus infection can cause a gastroenteritis when it may present with diarrhea, vomiting, and abdominal pain, with or without respiratory or general symptoms. [2] Children under the age of one-year appear particularly vulnerable. [12] However, it usually resolves within three-days. [2]
Rotavirus is the most common cause of gastroenteritis in children, [25] and produces similar rates in both the developed and developing world. [20] Viruses cause about 70% of episodes of infectious diarrhea in the pediatric age group. [13] Rotavirus is a less common cause in adults due to acquired immunity. [27]
Neonatal-onset multisystem inflammatory disease is a rare genetic periodic fever syndrome which causes uncontrolled inflammation in multiple parts of the body starting in the newborn period. Symptoms include skin rashes, severe arthritis , and chronic meningitis leading to neurologic damage.
These early symptoms can include diarrhea (which is often bloody), stomach cramps, mild fever, [10] or vomiting that results in dehydration and reduced urine. [9] HUS typically develops about 5–10 days after the first symptoms, but can take up to 3 weeks to manifest, and occurs at a time when the diarrhea is improving. [10]
Common constitutional signs and symptoms of HFMD include fever, nausea, vomiting, feeling tired, generalized discomfort, loss of appetite, and irritability in infants and toddlers. Skin lesions frequently develop in the form of a rash of flat discolored spots and bumps which may be followed by vesicular sores with blisters on palms of the hands ...
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Common symptoms include: [5] Fever; Abdominal pain; Diarrhea (typically bloody) Vomiting; Symptoms typically develop 4 to 7 days after exposure and may last 1 to 3 weeks or longer. In older children and adults, right-sided abdominal pain and fever may be the predominant symptoms, and may be confused with appendicitis.