development stage

Chemical composition and structure research stage

Tiny in shape, visible under an electron microscope

Cell-free structure, mainly composed of nucleic acids and proteins

Parasitism within living cells

contagious

Not sensitive to most antibiotics, sensitive to interferon

Can maintain infection ability for a long time

real virus

Subvirus

Size: Measured in nanometers (nm)

Shape: spherical, rod-shaped, tadpole-shaped

basic structure

shell symmetry

nucleic acid

protein

other ingredients

Adsorption

Intrusion and shelling

Biosynthesis

assembly

freed

latent, lysis, stable

Temperate phage (integrated state)

Lysogenic bacteria and their detection

Virus variant evolution

viral transport

Changes in the ecological environment and the impact of human social and economic activities

Human beings must be highly vigilant and pay attention to

strengthen international cooperation

Research and establish an evaluation system

Strengthen monitoring and research

Integrate laboratory research and epidemiology to develop and refine prevention measures for emerging viruses

Prevention and control of AIDS, SARS, etc.

Prevent agricultural pests, etc.

Phage control

Genetic engineering vectors, etc.

Composed of single-stranded covalent circular RNA molecules

A type of subviral factor that is genetically defective and needs to rely on helper viruses to replicate and express genes and complete proliferation.

A small RNA molecule that lives inside the capsid of a helper virus and relies on the helper virus to replicate.

Features

Small non-immune hydrophobic proteins that are infectious and capable of replicating within host cells

plaque

Plaques and lesions of infection

necrotic spots

Blood coagulation phenomenon and interference phenomenon

cytopathic effect