[Histonet] Treponema tissue blocks

[Bob Richmond]

In reply to Ni Nie's request:

The best source of Treponema pallidum control tissue used to be necrotic
liver from necropsies of syphilitic stillbirths. These were only 25 years
in the past when I was a pathology resident in the 1960s. Possibly some of
this material is still around. As congenital syphilis returns, there might
be such material available today - one such case could supply the world for
years, after all.

Mycobacterium tuberculosis control tissue can be obtained from necropsies
on monkeys with tuberculosis, most commonly rhesus macaques in India.

Bob Richmond
Maryville TN