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[7] [54] A neutropenic fever, also called febrile neutropenia, is a fever in the absence of normal immune system function. [55] Because of the lack of infection-fighting neutrophils , a bacterial infection can spread rapidly; this fever is, therefore, usually considered to require urgent medical attention. [ 56 ]
Fever of unknown origin (FUO) refers to a condition in which the patient has an elevated temperature for which no cause can be found despite investigations by one or more qualified physicians. [ 1 ] [ 2 ] [ 3 ] If the cause is found, it is usually a diagnosis of exclusion , eliminating all possibilities until only the correct explanation remains.
Febrile neutropenia or neutropenic fever is a defined as a single oral temperature value of ≥ 38.3 C (101 F) or a temperature ≥ 38 C (100.4 F) for ≥ 1 hour, with an absolute neutrophil count (ANC) < 1500 cell/microliter. [1]
Most febrile seizures will occur during the first 24 hours of developing a fever. [6] Signs of typical seizure activity include loss of consciousness , opened eyes which may be deviated or appear to be looking towards one direction, irregular breathing, increased secretions or foaming at the mouth, and the child may look pale or blue ( cyanotic ).
Familial Mediterranean fever (FMF) is a hereditary inflammatory disorder. [ 1 ] : 149 FMF is an autoinflammatory disease caused by mutations in the Mediterranean fever (MEFV) gene, which encodes a 781–amino acid protein called pyrin . [ 2 ]
a) Fever continues b) Fever continues to abrupt onset and remission c) Remittent fever d) Intermittent fever e) Undulant fever f) Relapsing fever. Intermittent fever is a type or pattern of fever in which there is an interval where temperature is elevated for several hours followed by an interval when temperature drops back to normal. [1]
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An antipyretic (/ ˌ æ n t i p aɪ ˈ r ɛ t ɪ k /, from anti-'against' and pyretic 'feverish') is a substance that reduces fever. [1] Antipyretics cause the hypothalamus to override a prostaglandin-induced increase in temperature. [citation needed] The body then works to lower the temperature, which results in a reduction in fever.