Nokea
In the micropreparation made from patient's regional lymph node punctate and stained according to Romanovsky-Giemsa method, the doctor found out thin microorganisms with 12-14 equal ringlets and pale- pink sharp pointes 10-13 mkm in length. The pathogen of what disease is it about?
Correct Answer: D
Rationale: The thin microorganisms described with 12-14 equal ringlets and pale-pink sharp points are characteristic of Borrelia spirochetes, the causative agent of relapsing fever. The ringlet appearance corresponds to the characteristic coiled structure of Borrelia spirochetes. The length of 10-13 mkm falls within the typical size range of Borrelia spirochetes. This pathogen is commonly identified in Romanovsky-Giemsa stained samples from patients with relapsing fever.
Summary of other choices:
A: Leishmaniasis - Leishmania parasites are larger and do not have the described ringlets or pale-pink sharp points.
B: Leptospirosis - Leptospira bacteria are not described as having ringlets or pale-pink sharp points.
C: Surra - Surra is caused by Trypanosoma evansi, and the description does not match the characteristics of this parasite.