Step-ladder pattern pyrexia (temperature of today exceeds that of previous day):
Enteric fever.
Double quotidian fever (or ‘camel hump fever’ or ‘rabbit-ear pattern’ pyrexia, where
there is double fever spikes in a single day): Kala-azar (classical example), gonococcal
perihepatitis.
Saddle-back pyrexia (pyrexia continues from 1 to 10 days where there is a fall of
temperature for 2 to 3 days in the middle): Dengue.
Pel-Ebstein temperature (days or weeks of fever alternates with afebrile period for
few days): Hodgkin’s disease (classical), brucellosis and hypernephroma.
Black water fever (intravascular haemolysis and haemoglobinuria from P. falciparum
infection, turning urine dark reddish in nature along with renal failure): Malaria.
Black fever (skin turns black due to hyperpigmentation, especially of the face): Kalaazar.