Sechenov School
Home › Pathology › Relapsing Fever

Relapsing Fever

Febris recurrens

For medical students2 min readUpdated 2026-10-10

Relapsing fever (Febris recurrens) is a severe infectious disease characterized by specific pathomorphological changes and pronounced systemic manifestations. This material covers the key stages and complications of this pathology.

PathogensBacterial agents and pathogenic microorganisms
PathomorphologySpecific granulomas and necrotic changes
ComplicationsRisk of perforation, hemorrhage, and shock states

General Characteristics and Morphological Changes

The pathological process in typhoidal and related diseases is accompanied by systemic microcirculatory disturbances, the formation of specific cellular infiltrates, and granulomas in various internal organs.

Stages of the Process and Dynamics of Lesions

Changes in tissues and organs develop sequentially, passing through several morphological stages:

  1. Initial manifestations with cellular proliferation and blood flow disturbance.
  2. Stages of deep alterative changes, necrosis, and tissue sloughing.
  3. Reparative processes, healing, and outcomes of the pathological process.

Complications and Clinical-Morphological Features

The severe course of the disease is often associated with the development of life-threatening conditions. These include deep destructive tissue damage, vascular disorders, hemorrhages, and perforations followed by serositis.

Mnemonic

TIF: Tissue Infiltrates with Fantastic staging dynamics—from proliferation to necrosis.

Go deeper

More topics in Pathology

Rheumatic EndocarditisLymphatic Circulation DisordersSecondary Arterial HypertensionMinimal Change DiseasePulmonary Edema: Pathogenesis, Morphology and DiagnosisHelicobacter pylori GastritisAdrenal PathologyAplastic AnemiaMolecular Basis of CarcinogenesisComorbidity and Combined Major DiseasesCentral Nervous System Tumors and Paraneoplastic SyndromesMelanocytic Nevi and Malignant MelanomaPathology →