PATHOGENIC BACTERIA.

anilin-water-fuchsin solution for a few moments, sections
in the same solution cold for twenty-four hours; then
immerse them first in a weak, then in a strong, solution
of chlorid of iron. The cover-glasses are washed in
water, sections in alcohol, and subsequently passed
through the usual reagents for dehydration and clearing.

FIG. 67.—Bacillus of syphilis (Lustgarten), from a condyloma; x looo (Itzerott

and Niemann).

In some syphilitic tissues these methods suffice to de-
fine distinct bacilli with a remarkable similarity to the
tubercle bacillus. The organism is about the same size
as the tubercle bacillus, and even more frequently curved,
but often presents a club-like enlargement of one
end (involution-form?). The bacilli very frequently
occur singly, though more often in groups, and never lie
free, but are always enclosed in cells. These bacilli are
not always found in syphilitic lesions, nor is their dem-
onstration easy under the most favorable circumstances.
Lustgarten emphasizes particularly that they are only
demonstrable after the most painstaking technical pro-
cedures.

The probability of the specificity of this organism was
considerably lessened by the observation by Matterstock,
Travel, and Alvarez-that in preputial smegma, and also-