< Page:Tropical Diseases.djvu
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SYNOPTICAL TABLE OF VARIOUS STRAINS OF SPIROCHÆTE AND CLINICAL SYMPTOMS OF THE
RELAPSING FEVERS THEY EVOKE IN MAN
(Compiled mainly from Mackie, Chosky and Balfour)
| Egypt Spirochæta berbera | Algiers Spirochæta berbera (?) | Europe Spirochæta recurrentis (obermeieri) | Africa Spirochæta duttoni | America Spirochæta novyi | India Spirochæta carteri | ||
| Minimal length | 13.5 . | 12 . | 12 . | 13 . | 7-9 . | 12 . | |
| Shape | Irregular open flexures. | Irregular open flexures. | Spiral. | Open flexures. | Regularly spiral. | Open flexures. | |
| Flagella | ? | ? | Peritrichous. | Peritrichous. | Terminal (Novy.) | ? | |
| Animals Susceptible. | Gerbils, slightly. Monkeys (Cercopithecus). | Rats and mice, with difficulty. Monkeys (Macacus). | Small rodents, only after passage through monkeys. | Small rodents and many animals susceptible. | Small rodents very susceptible. | Small rodents infected with difficulty. | |
| Course in animals. | Very mild. | As a rule mild. | Mild. | Very severe. | Severe. | Very mild. | |
| Subinoculations in animals. | Gerbil to gerbil, positive. | Rat to rat, or mouse to mouse, with difficulty. | Monkey to monkey, mouse to mouse, positive. (Fülleborn and Meyer.) | Monkey to monkey, positive. Same for most animals. (Breinl, Kinghorn & Garrett.) | Monkey to monkey and mouse to mouse, positive. | Monkey to monkey and mouse to mouse, positive. (Mackie.) | |
| Course in man. | Fairly severe. First attack 2-8 days; two or three relapses. | Fairly severe. First attack 2-8 days; two or three relapses. | One, sometimes two relapses. Incubation period 5-7 days. Duration of attack 5-6 Apyrexia 7-10 | Severe—four or five relapses. Incubation period 7-10 days. Duration of 1st attack 3 Apyrexia 1-8 | Mild, rarely more than one relapse. Incubation period 5-7 days. Duration, 1st attack 5-6 Apyrexia 7-10 | Severe, one or two relapses. Incubation period 7 days. Duration, 1st attack 5-7 Apyrexia 5-13 | |
| Parasites in human blood. | Variable. | Variable. | Heavy infection. | ||||
| Natural transmitters. | Lice. | Lice Ticks (Argas persiscus). (Sergent.) | Lice. (?) Bed bug (Acanthia lectularia). | Ticks (Ornithodoros moubata). | Lice (?) Ticks (Ornithodoros talaje) (?). | Lice (?)Bug (Cimex rotundatus). | |
| Serum reactions | ? | Immune serum possibly without effect on S. recurrentis (obermeieri). | Immune serum without any effect on S. novyi or duttoni. | Immune serum without any effect on S. novyi or recurrentis (obermeieri). | Immune serum without any effect on S. recurrentis (obermeieri), duttoni, or carteri. | Immune serum without any effect on S. novyi. |
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