Meningococcemia Clinical Presentation
- Author: Mahmud H Javid, MBBS; Chief Editor: Burke A Cunha, MD more...
History
Persons with meningococcal disease may present with a nonspecific prodrome of cough, headache, and sore throat. This is followed by rapid onset of fever with chills, arthralgias, and myalgias. The potential rapidity of progression cannot be stressed enough.
- Meningitis that accompanies meningococcemia may result in headache, neck stiffness, lethargy, and drowsiness.
- Decreased mentation and coma may be present.
- Young children may present with sudden onset of fever and lethargy. They may also have vomiting and convulsions.
- In chronic meningococcemia (rare), painful skin lesions are present on the extremities (see the following images), similar to those seen in gonococcemia, with migratory polyarthritis and tenosynovitis. Antibiotic treatment results in a prompt response.
Petechial rash on lower extremities. Courtesy of Professor Chien Liu.
Petechial lesions on the palm. Courtesy of Professor Chien Liu.
Physical
Patients with meningococcal disease appear severely ill.
- Tachycardia and mild hypotension are present.
- Fever is moderate. High fever is present in fulminant meningococcemia.
- A petechial rash develops in 50-80% of patients and involves the axillae, flanks, wrists, and ankles as shown in the images below. Petechiae are often located in the center of lighter-colored macules. Lesions commonly begin on the trunk and legs in areas where pressure is applied. They are discrete lesions 1-2 mm in diameter. Confluence of lesions results in hemorrhagic patches, often with central necrosis.
Dorsum of the hand showing a petechial rash. Courtesy of Professor Chien Liu.
Petechial rash on lower extremities. Courtesy of Professor Chien Liu. - In some cases, a transient maculopapular rash develops, usually lasting for less than 48 hours.[12]
- Congestive heart failure, gallops, and pulmonary edema may be present. Other evidence of end-organ damage may also rapidly appear.
- Patients with fulminant meningococcemia rapidly deteriorate clinically, with hypotension and respiratory failure.
- Pericarditis can occur during the acute disease or in the recovery period and is associated with serogroup C disease.
Causes
Meningococci (0.6 µm X 0.8 µm) are gram-negative single cocci or diplococci (see the image below) with flattened adjacent sides. Older cultures can vary considerably in size and shape. Serotyping is based on the polysaccharide capsule. The organisms grow at 35-37°C in a moist oxygen-reduced atmosphere containing 5-19% carbon dioxide on media that contains blood.
Gram-negative intracellular diplococci. Courtesy Professor Chien Liu. - Seroagglutination is used to segregate meningococci into 13 serogroups: A, B, C, D, X, Y, Z, E, W-135, H, I, K, and L. Ninety-eight percent of infections are caused by encapsulated serogroups A, B, C, Y, and W-135.
- Individuals with complement component deficiencies are at an increased risk for meningococcal infections.
- Recurrent meningococcemia has also been reported in patients with immunoglobulin G2 subclass deficiency.
- Splenectomy and host genetic polymorphisms are also risk factors.
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