Table 1.

Summary of investigations to look for an infectious aetiology.

Investigation	Results
Influenza virus antigens A and B	Negative
Urine culture	No growth
Blood culture	No growth
Malaria antigen rapid test Plasmodium falciparum and P. vivax antigens	Negative
Widal test slide agglutination test Salmonella typhi O and S. typhi H: Salmonella paratyphi AH:	Negative Negative Positive (dilution up to 1:320 )
2D and transthoracic echocardiogram	No vegetation
COVID-19 RT PCR;	Negative
HIV I and II antibodies rapid test	Negative
Blood picture	Mild normochromic normocytic anaemia was noted. Mild neutrophilia, eosinophilia and thrombocytosis appear reactive probably to infection/inflammation

HIV: human immunodeficiency viruses.