Thick-walled Cysts Research Articles

ABERRANT SALIVARY GLAND IN TONSILLAR FOSSA

An aberrant salivary gland may be of more frequent occurrence than one would believe from the number of cases reported. Only 4 could be found in a survey of the literature, the most recent being that reported by Prohovnik.¹ <h3>REPORT OF A CASE</h3> W. E., aged 4, in the service of Dr. B. D. Parish, was referred for tonsillectomy on account of earaches and cough. Her tonsils were of moderate size. They were removed by dissection with the patient under ether anesthesia. After the right tonsil was removed by means of a snare, there appeared at the lower part of the fossa a pinkish white tissue, which at first was thought to be unremoved tonsillar tissue. Closer examination showed it to be smooth and soft with a firm surface. It resembled a thick-walled cyst or a large blood vessel. It seemed to be attached laterally to the muscular bed of

ENDAMŒBA CITELLI SP. NOV. FROM THE STRIPED GROUND SQUIRREL CITELLUS TRIDECEMLINEATUS, AND THE LIFE-HISTORY OF ITS PARASITE, SPHÆRITA ENDAMŒBÆ SP. NOV

1. Endamœba citelli sp. nov. is a commensal in the cœcum of the striped ground squirrel, Citellus tridecemlineatus.2. The nucleus of the free form is typical of the genus Endamœba.3. The cyst is characterized by a nuclear structure somewhat different from that known for other amœbæ, and an unusually thick cyst wall with a yellowish refraction.4. The cytoplasm of this amœba may contain a cytridine parasite, Sphærita endamœbæ sp. nov.5. The developmental cycle of this cytozoic parasite was followed from the free bacterium-like infective stage to the spore liberated from the sporangium inside the cytoplasm of the amœba.6. Sphærita endamœbæ, like other members of the genus, produces degenerative changes in the protoplasm of its host, particularly in the nucleus.

Notes on Councilmania lafleuri (Kofoid-Swezy 1921).

ConclusionIt is suggested that there are at least two types of E. coli; one-of which a perfect description is given by Kofoid under the name of Councilmania-characterized by possessing clear blade-like pseudopodia, well differentiated from the endoplasm, occasionally of exceptional motility, which may be retained even after prolonged centrifugation in cold tap water in the process of concentration. This type seems to have a tendency to the formation of irregularly contoured, thick-walled cysts. Such cysts as these are easily fractured by immersion in a hot mercurial solution such as Schaudinn.The other type is more sluggish, and has not the clear blade-like pseudopodia in the free state. By concentrating a sufficient number of the cysts of this type and subsequently fixing in hot Schaudinn, some at least of the cysts will probably give the appearances to which Kofoid and Swezy have applied the name Councilmania. Whilst Kofoid's Councilmania would seem to refer to the first type mentioned, if my reasoning ...

Ingestion of Red Blood Corpuscles by an Intestinal Amoeba with Eight-Nucleated Cyst

SummaryAn intestinal amoeba which is not Endamoeba histolytica but which may be identified as Endamoeba coli by a liberal interpretation of such features as motivity, nuclear construction, thickness of cyst wall, shape of cyst, affinity for stain, and character of chromatoidal bodies, coming from a person who has had no recognizable harm from it, readily ingested red blood corpuscles in the test tube on one occasion but failed to do so on another.

Ovarian Cystoma, with Unusually Thick Cyst Wall

Ovarian Cystoma, with Unusually Thick Cyst Wall