Question: What causes Katayama Fever?

Context:
The laboratory diagnosis of schistosomiasis and Katayama syndrome in returning travellers is difficult because the number of excreted eggs is often very limited.
Eosinophilia (sometimes exceeding 50%) is often present in patients with acute schistosomiasis (Katayama fever), but may be limited or absent in late fibrotic manifestations of the disease.
Laboratory diagnosis of schistosomiasis and Katayama syndrome in returning travellers
The specific diagnosis of early schistosomiasis and Katayama fever relies essentially on serologic tests or preferably on PCR (if available). 
BACKGROUND: Katayama fever is an acute clinical condition characterised by high fever, dry cough and general malaise occurring during early Schistosoma spp. infection.
Schistosomiasis is a helminthic infection that is endemic in tropical and subtropical regions.
In Africa, it predominantly manifests as urogenital disease, and the main infective agent is Schistosoma hematobium.
His symptoms were caused by acute invasive schistosomiasis, also known as Katayama fever.
OBJECTIVES: To investigate the characteristics of imported Katayama fever (acute schistosomiasis) as well as evolution and outcome under treatment.
RESULTS: Twenty-three patients were diagnosed with Katayama fever by Schistosoma egg detection and/or by seroconversion. 
The best therapeutic approach to acute schistosomiasis (Katayama fever) is still unsettled.
Katayama fever is an acute clinical condition characterised by high fever, dry cough and general malaise occurring during early Schistosoma spp.
Acute schistosomiasis, called safari's fever in Africa and Katayama fever in Japan, is an immunoallergic reaction due to transcutaneous penetration of infective cercaria.
[Acute schistosomiasis (Katayama fever)].
Acute schistosomiasis (Katayama fever): corticosteroid as adjunct therapy.
Katayama fever or acute schistosomiasis probably occurs more commonly than is recorded.
His symptoms were caused by acute invasive schistosomiasis, also known as Katayama fever.
Three distinct syndromes caused by schistosomiasis have been described: cercarial dermatitis or swimmer's itch, acute schistosomiasis or Katayama fever, and chronic schistosomiasis.
Three well-defined syndromes caused by schistosomiasis mansoni have been described: the stage of invasion, acute schistosomiasis (Katayama fever), and chronic schistosomiasis.
Early detection of circulating anodic antigen (CAA) in a case of acute schistosomiasis mansoni with Katayama fever.
 A 35-year-old man presented with fever and severe urticaria after visiting Uganda. His symptoms were caused by acute invasive schistosomiasis, also known as Katayama fever.
His symptoms were caused by acute invasive schistosomiasis, also known as Katayama fever.  .
Three well-defined syndromes caused by schistosomiasis mansoni have been described: the stage of invasion, acute schistosomiasis (Katayama fever), and chronic schistosomiasis.
Three distinct syndromes caused by schistosomiasis have been described: cercarial dermatitis or swimmer&apos;s itch, acute schistosomiasis or Katayama fever, and chronic schistosomiasis.
 To investigate the characteristics of imported Katayama fever (acute schistosomiasis) as well as evolution and outcome under treatment.  Between April 2000 and September 2004, we included prospectively all patients with confirmed diagnosis of Katayama fever.
A 35-year-old man presented with fever and severe urticaria after visiting Uganda. His symptoms were caused by acute invasive schistosomiasis, also known as Katayama fever.
To investigate the characteristics of imported Katayama fever (acute schistosomiasis) as well as evolution and outcome under treatment.  Between April 2000 and September 2004, we included prospectively all patients with confirmed diagnosis of Katayama fever.

Answer: Katayama fever is an acute clinical condition characterised by high fever, dry cough and general malaise occurring during early Schistosoma spp. infection.
Exact answer: Schistosoma spp