. Animal parasites and human disease. Medical parasitology; Insects as carriers of disease. 130 AMEBiE Possibly Endamceba coli will prove to be a group of related species instead of a single species. In Brazil, for instance, Aragao has described an ameba very similar to E. coli in some respects, but with certain constant differences, which he named E. brazilien- sis. A small ameba, Vahlkampfia lobospinosa (Fig. 36), usually supposed to be identical with the free-living fresh water species, is often found in the large intestine and in faeces, probably having been ingested in cyst form with food
. Animal parasites and human disease. Medical parasitology; Insects as carriers of disease. 130 AMEBiE Possibly Endamceba coli will prove to be a group of related species instead of a single species. In Brazil, for instance, Aragao has described an ameba very similar to E. coli in some respects, but with certain constant differences, which he named E. brazilien- sis. A small ameba, Vahlkampfia lobospinosa (Fig. 36), usually supposed to be identical with the free-living fresh water species, is often found in the large intestine and in faeces, probably having been ingested in cyst form with food. It does no ..cv damage whatever. In our mouths several species find a congenial environment, and one, E. gingivalis (buccalis), is very common and is thought by most workers to be at least indirectly connected with pyorrhea, which, next to decaying teeth, is probably Fig. 36. Vahlkampfia , •, , , j- m • • t lobospinosa (whitmorei). the commonest human disease. E. gingivalis c. v., contractile vacu- also attacks the tonsils, and is probably ole; n., nucleus. X 1300. v xl ,1 c , • 1 • i r -±. (After whitmore.) indirectly the cause ol certain kinds ol goitre. Another species of ameba, which has only rarely been found, is E. mortinatalium. It has been observed in various organs such as the liver, kidneys and lungs of syphilitic infants and in two cases in the parotid glands of non-syphilitic infants. Syphilis seems to serve as a favoring circumstance for this species. On account of its rarity this ameba is not of such importance to the human race as E. histolytica or E. gingivalis, though apparently very destructive when it does occur. Another species, E. urogenitalis, has occasionally been found in the urogenital tract, being voided with the urine. Two species of Craigia live as intestinal parasites of man, and cause a type of dysentery closely resembling that caused by E. histolytica. Amebic Dysentery Importance. — One of the most serious menaces in the tropics is
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmedical, bookyear1918
