Listeria monocytogenes Bacteremia in
an Immunocompetent Host
Chinbunchorn T, MD1, Lee B, MD2, Upapan P, MD2
Affiliation :
1 Prevention Unit, Thai Red Cross AIDS research centre, Bangkok, Thailand
2 Department of Medicine, HRH Princess Maha Chakri Sirindhorn Medical Center, Faculty of Medicine, Srinakharinwirot University,
Nakhon Nayok, Thailand
The authors report a patient with a very rare manifestation of Listeria monocytogenes bacteremia infection presented
with exudative tonsillitis in an immunocompetent host. The patient presented with acute febrile illness with upper respiratory
tract symptoms. He did not have any underlying diseases, but had a history of eating microwaved ready-to-eat frozen meals.
Physical examination revealed enlarged tonsils with exudates. Blood culture indicated that the patient was suffered from Listeria
monocytogenes. Magnetic resonance imaging (MRI) of brain, cerebrospinal fluid (CSF) analysis and culture were normal. There
were no physical or laboratory findings to suggest that he was immunocompromised. He was intravenously treated with ampicillin
for 21 days and was followed-up uneventfully for three years. To our knowledge, this is the very rare case of Listeria monocytogenes
bacteremia without central nervous system involvement presented with exudative tonsillitis in an immunocompetent host.
Keywords : Listeria monocytogenes, Bacteremia, Immunocompetent, Exudative tonsillitis
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