Tropical diseases : a manual of the diseases of warm climates.

  • Manson, Patrick, Sir, 1844-1922.
Date:
1907
Catalogue details

Licence: In copyright

Credit: Tropical diseases : a manual of the diseases of warm climates. Source: Wellcome Collection.

Provider: This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.

    880/920 (page 840)
    Sporogomj in Ixodidas. Within the stomach of the engorged female ticks, according to Koch and Klein, the sporonts become fiee and aggregate in clusters, projecting numerous fine protoplasmic processes from their hioadest end; the maciogametes assume a globular shape, whilst the inicroga- metoc\ tes become wedge-shaped and apply themselves round the former. The ookinete is club-shaijed and closely resembles the ookinetes of Plasmodium and Hicmoproteus. In the eggs of infected ticks Koch found large pear - shaped forms about four limes the size of the sporont as seen in the vertebrate’s blood. Quite recently Miyajima succeeded in cultivating i?. parra from Japanese oxen in ordinary bouillon and saw the ookinetes develop into flagellated organisms similar to the culture forms of typical trypanosomes. Already in 1904 Schaudinn had suggested that the BabesiiU might be allied to the trypanosomes, basing his suggestion on the dis- covery of trypanosome-like forms by Kossel and Weber in the blood of Finnish oxen suffering from htemoglobinuric fever and in smears from the contents of the intestine of ticks fed on infected animals. Type species B. higemina. SPECIES DETEUMINEP : B. higemina (Smith and Kilborne, 18t)J) Fi/ro.^oma higemimim Smith and Kilborne, Apiosoma bigcminum Wan- dollek, Piropla.sma higeminum Patton, Babesia bovis Chauvelot c.p., ]xodioplasma specxjiami bovnm Schmidt). Cause of Texas fever in oxen. Sporonts 1 to 3 p in length. Sporogony in Margaropns australis (Fuller) in S. America, Cuba, Porto Kico, Australia, Philippine Islands. M. decohrutus (Koch) S. Africa. B. bovis (Babes, 1888) (= Hamatoeoecus bovis Babes, Biro- plasma bigeminum Auct. c.p.) Cause of ha-moglobinuric fever “red water’’ in European oxen and in “red deer,” Cerviis claphus L. Sporogony in Ixodes reduvins L., Margaropns annulatns (Say.). B. parva (Theiler) (=Piroplasma parvnin Theiler). In oxen. o ; Fig. 21 ().—Babesia parva. {Afier Theiler.) ISIorphologically its minute size and the frequent occurrence of rod-shaped forms separate this parasite from B. bovis. IMoreover it cannot be communicated by blood inoculation. Sporogony in Bhipicephalus appendicnlatns Neum, It. sxmns Koch. (Fig. 216) B. muians (Theiler, 1907) (= Biroplasma mntans Theiler). In oxen. Sporogony unknown. B. cerri Franc;a and Borges 1907. In the blood of fallow