. A practical treatise on medical diagnosis for students and physicians . lasting a week orten days, and an undulatory type continuing for weeks or , the relapses are known to occur over a period of two third is known as the intermittent type, in which there is a dailyrise of temperature without other marked symptoms. The undulatorytype is the most common. The infectious micro-organism is Micrococcusmelitensis. Diagnosis. A positive differential diagnosis is made from all formsof malaria by an examination of the blood, and from typhoid fever bythe Widal test and the abse
. A practical treatise on medical diagnosis for students and physicians . lasting a week orten days, and an undulatory type continuing for weeks or , the relapses are known to occur over a period of two third is known as the intermittent type, in which there is a dailyrise of temperature without other marked symptoms. The undulatorytype is the most common. The infectious micro-organism is Micrococcusmelitensis. Diagnosis. A positive differential diagnosis is made from all formsof malaria by an examination of the blood, and from typhoid fever bythe Widal test and the absence of Bacillus typhosus in the urine orstools of the suspected patient. The micro-organism has not beenisolated from the blood, but the serum reaction is a valuable means ofdiagnosis. (See page 552.) This reaction is obtained as in cases oftyphoid fever. The culture must be carefully selected. With a 1 to 10 MALTA FEVER. 767 or 1 to 50 (lilution ngiiiutination takes place when the serum of a ])atientwith Malta fever is used. The serum of sueh a patient (1(K\s not have. auv effect upon the typhoid bacillus nor upon other organisms. Aldrichstates that the reaction first occurs about the fifth day. 768 THE INFECTIONS. BACTERIOLOGICAL Infection. Although the infection is usually limited to the genito-urinary tract, itis Avell known that the gonococcus may enter the blood and infect tissueselsewhere, causing a local inflammation. We therefore see symptomsdue to the primary infection ; symptoms due to infection of the genito-urinary organs by direct continuity and systemic infection. The primaryinfection involves the adnexie of the genital organs in the male and thefemale. Salpingitis, metritis, and ovaritis in females, with the occuirenceoccasionally of peritonitis, arise from spreading by continuity. In bothsexes, cystitis, ureteritis, and pyelitis occur. The infection is usuallymixed. When the gonococcus invades the blood, symptoms of sej^ticfemiaor pyaemi
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