THE ETIOLOGY OF BURSATI 235
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DESCRIPTION OF MICROPHOTOGRAPHS.
Plate XIV, fig. 1.—Low power photograph of a section of bursati growth, removed from the
angle of the mouth, showing a typical habronemic abscess in the early lymphocytic
stage. In the central degenerated area, both longitudinal and cross-sections of the larvao
can be seen. The histological picture resembles very closely that of early gastric
abscesses, due to H. megastoma.
Fig, 2.—Low power photograph illustrating the essential lesion of Bursati, characterised by a
cross-section of the parasite, enclosed in a blood vessel, around which a lymphocytic
infiltration can be seen arranged in the form of a nodule. This is the earliest stage in
the formation of the kunkur.
Plate XV, fig. 1.—Section of a bursati growth, removed from the limb, showing a coiled larva
in a dilated vessel. Note the sharp outline of the lumen and that the concentration
of the toxic effect on the vessel wall diminishes from the centre outwards.
Fig. 2.—Same as PI. XIV, fig. 2 but under a higher magnification. The worm larva is seen
here at its primary seat of operation, the lumen of a capillary vessel.
Plate XVI, fig. 1.—Low power photograph of an exceptional section of a growth. Superficial
cutis shows degenerative changes, with a slight involvement of two epithelial papillae in
the centre of the field. Sub-epithelial layer is practically unaffected, excepting for slight
eosinophile infiltration.
Fig. 2.—Low power photograph of a bursati section. An elongated kunkur, which is more
extensive in the depth of the growth than towards the surface, is seen here, having been
formed along the course of one of the dilated perpendicular vessels. Note the partial
loss of staining affinities of the major portion of the field, compared to the darker and
healthier portion on the left.
Plate XVII, fig. 1.—Low power photograph. On the left, four kunkurs are to be seen. In
the case of the lowest kunkur, the centrally situated blood vessel can be seen, as also the
diffusion of the toxin for the same distance in all directions, giving a more or less
rounded appearance to the kunkur.
Fig 2.—Low power photograph, showing two kunkurs in a bursati section. The left one is
practically free to be evacuated from the fistula in the mother tissue. The right one
has been formed in a hair follicle, the hair root having already been destroyed.
c 2