title: Clinical features of Plasmodium vivax malaria.
abstract: BACKGROUND
  Since its reemergence in 1993, a number of cases of Plasmodium vivax malaria have been reported in Korea. We analyzed the cases of malaria patients living in Chuncheon and its neighboring communities, to characterize its clinical manifestations and laboratory findings, and to identify any differences between our clinical findings and those of previous studies.
  
  
  METHODS
  We reviewed the clinical records of cases that were confirmed as malaria by peripheral blood smear at Chuncheon Sacred Heart Hospital from July 1998 to September 2001.
  
  
  RESULTS
  Forty-four cases were included in the study. All patients were infected with Plasmodium vivax, and presented with high fever; however, tertian fever developed in only 15 patients (35.7%). A number of cases showed various symptoms, which included headache, abdominal pain, nausea and vomiting. Of the 44 cases identified, 41 (93.2%) developed malaria between June and September. Thrombocytopenia was a prominent finding in 75% of the cases at diagnosis, but resolved during or after therapy. Other laboratory abnormalities such as, anemia, elevated transamines, coagulopathies, and elevated lactose dehydrogenase (LDH) were also noted. Cerebrospinal fluid (CSF) studies were performed in five cases, one of which showed pleocytosis in the CSF.
  
  
  CONCLUSIONS
  We noted only 15 patients (35.7%) with tertian fever; the other patients showed variable fever patterns. Thrombocytopenia was the most prominent laboratory finding. Therefore, we suggest that malaria should be included in the differential diagnosis of febrile diseases with an onset between June to and September, regardless of the pattern of the fever.
authors.affiliation: Department of Internal Medicine, Chuncheon Sacred Heart Hospital, College of Medicine, Hallym University, Chuncheon, Korea. hunhos@med.hallym.ac.kr
authors.forename: Hun Ho
authors.initials: HH
authors.lastname: Song
authors.forename: Soon Ok
authors.initials: SO
authors.lastname: O
authors.forename: Su Ho
authors.initials: SH
authors.lastname: Kim
authors.forename: Sang Ho
authors.initials: SH
authors.lastname: Moon
authors.forename: Jin Bong
authors.initials: JB
authors.lastname: Kim
authors.forename: Jong Woo
authors.initials: JW
authors.lastname: Yoon
authors.forename: Ja Ryong
authors.initials: JR
authors.lastname: Koo
authors.forename: Kyung Sun
authors.initials: KS
authors.lastname: Hong
authors.forename: Myung Goo
authors.initials: MG
authors.lastname: Lee
authors.forename: Dong Joon
authors.initials: DJ
authors.lastname: Kim
authors.forename: Dong Hoon
authors.initials: DH
authors.lastname: Shin
authors.forename: Sung Ha
authors.initials: SH
authors.lastname: Kang
authors.forename: Moon Gi
authors.initials: MG
authors.lastname: Choi
authors.forename: Kwang Hack
authors.initials: KH
authors.lastname: Lee
mesh_terms: D000328:Adult; D000818:Animals; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008288:Malaria / Q000097:blood / Q000134:cerebrospinal fluid / Q000175:diagnosis* / Q000382:microbiology*; D008297:Male; D010966:Plasmodium vivax / Q000302:isolation & purification*; D012189:Retrospective Studies; D013921:Thrombocytopenia / Q000175:diagnosis