. Fig. 33.—Large (a) and small (b) hooks of pork-measle tapeworm {Tcvnia solium). X 280. (After Leuckart.) also common to osseous cachexia and rachitis. Paralysis of the tongue and of the lower jnw is of greater importance. In exceptional cases, where the cj'sticerci are very numerous and penetrate the hrain, signs of encephalitis, vertigo, and turning sickness (gid, sturdy) may he produced. These signs, however, disappear, and the cysticerci undergo atrophy. Interference with movement may give rise to suspicion when the toes of the fore and hind liml)S are dragged along the ground, and thus h
. Fig. 33.—Large (a) and small (b) hooks of pork-measle tapeworm {Tcvnia solium). X 280. (After Leuckart.) also common to osseous cachexia and rachitis. Paralysis of the tongue and of the lower jnw is of greater importance. In exceptional cases, where the cj'sticerci are very numerous and penetrate the hrain, signs of encephalitis, vertigo, and turning sickness (gid, sturdy) may he produced. These signs, however, disappear, and the cysticerci undergo atrophy. Interference with movement may give rise to suspicion when the toes of the fore and hind liml)S are dragged along the ground, and thus hecome worn. This pecu- liarity is due to the presence of cysts in the muscles of the limhs, hut it occurs in an al- most identical form in osseous cachexia. One symptom alone is pathognomonic, and it appears only at a very late stage—viz., the presence of cysts under the thin mucous membranes which are accessil)le to examination, such as those of the tongue and eye. Visual examination then reveals beneath these mucous membranes the presence of little greyish-white, semi-transparent grains the size of a grain of barley, or even larger. Unfortunately, in an animal so diffi- cult to handle as the pig, this visual examination is decidedly troublesome, and is usually replaced by palpa- tion. In many instances the disease does not attract attention during the patient's life, and is only discovered on slaughter in consequence of the lesions by which it is characterised. Diagnosis. As the characteristic lesions of cj'sticercus disease are to be found in the depths of the muscular and connective tissues, and as the external symptoms may be regarded as of doul)tful significance, the diagnosis can only be confirmed during life by manual examination of the tongue. This examination of the tongue has been practised since the earliest times. Aristophanes even speaks of it, and in the Middle Ages it was performed under sworn guarantees. The regulations concerning the inspection of meat hav
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectveterin, bookyear1920
