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Microbiology

Rhabdoviruses (Rabies)

4 topics with concise reviews: definitions, key facts, and class questions.

In this section, we analyze the Rhabdoviridae family and its primary medically relevant representative — the rabies virus (Rabies lyssavirus). This is the causative agent of an invariably fatal yet preventable zoonotic infection that requires flawless knowledge of action algorithms from a physician.

The material is divided into logical blocks: from the bullet-shaped morphology of rhabdoviruses to the epidemiology and neurotropic pathogenesis (retrograde axonal transport). You will study the classic clinical picture including hydrophobia, methods of post-mortem and antemortem diagnosis (Negri bodies), as well as the key stage — specific prevention.

During classes and exams, instructors most frequently ask about the mechanism of viral progression into the CNS, the differential diagnosis of disease stages, and, most importantly, the post-exposure prophylaxis regimen (indications for vaccine and immunoglobulin administration). Without this knowledge, no student will pass the exam, and a physician will not be able to save a patient after a bite.

Section Topics

Frequently asked questions for this section

What shape do members of the Rhabdoviridae family have?

They have a bullet-like shape, representing a cylindrical structure with one rounded and one flat (truncated) end.

What shape does the rabies virion have?

The rhabdovirus virion has a characteristic bullet-like shape measuring 75–180 nm.

What determines the duration of the incubation period in humans?

From the site of the bite (closer to the head means faster), the multiplicity of injuries, and the source of infection (incubation is shorter with bats).

The disease is invariably fatal once clinical symptoms develop. Antemortem diagnosis is difficult, and the primary confirmatory sign (Negri bodies) is detected in brain tissues.

The disease is invariably fatal once clinical symptoms develop. Antemortem diagnosis is difficult, and the primary confirmatory sign (Negri bodies) is most reliably detected in brain tissues.

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