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Life Sciences Articles. What is Agar? Spatial Transcriptomics in Neuroscience and Neurological Disorders. Bioreactor Design and Control in the Biopharmaceutical Industry. Real-Time Release Testing...
3 天前 · 1. Why am I using Largactil? Largactil contains the active ingredient chlorpromazine hydrochloride, one of a group of medicines called phenothiazines. Largactil is used to treat several conditions...
- Terminology For Modes of Transmission
- The Different Modes of Transmission
- Further Reading
Chain of Infection
In epidemiology, a triad model called the chain of infection states that infectious diseases occur because of the interaction between an infectious agent, a host, and their environment. The chain of infection refers to the series of events that result in a new person (also called a susceptible host) becoming infected with an infectious agent.
Fomite
A fomite is an object or surface that is capable of transmitting disease and infectious agents. Fomitescan also be referred to as passive vectors. Fomites can include pens, phones, work surfaces, countertops, tabletops, handrails, and doorknobs.
Portal of Entry
A portal of entry is how an infectious agent enters a susceptible host. For the pathogen to multiply, the portal of entry has to provide access to tissues. Portals of entry are often the same as the portal of exit in the disease host. This is seen with the influenza virus. Flu exits through the respiratory tract in the host and enters through the respiratory tract in the susceptible host. Other portals of entry include through the skin, mucous membranes, and blood.
Direct Contact
Direct contact takes place through skin-to-skin contact, as well as kissing and sexual intercourse. However, direct contact does not only refer to contact between humans. Direct contact with contaminated soil is also possible as well as through contact with fomites. Infection through respiratory droplets is a form of direct contact, such as through sneezing, coughing, or talking. Image Credit: frank60/Shutterstock.com
Droplet Transmission
Droplet transmission can occur when a person comes within 1 meter of an infected person. Infectious diseases can be spread through respiratory droplets released into the air when a person coughs or sneezes at this close proximity. Infectious diseases can be spread through droplets of different sizes, with droplet particles over 5-10 μm in diameter being respiratory droplets, and droplet particles under 5 μm in diameter being droplet nuclei. Respiratory droplets can enter the body through the...
Indirect Contact
Indirect contact allows a pathogen to spread to a host through suspended air particles, fomites, or vectors (insects such as mosquitoes and fleas). Airborne transmission is possible when droplet nuclei are suspended in the air. Airborne dust or particles from soil is also capable of spreading pathogens when it is blown into the air. Droplet nuclei can travel long distances through the air, whereas respiratory droplets quickly fall to the ground. Indirect contact is often facilitated when uncl...
2019年6月14日 · What is chronic pain? Pain is a signal from the nervous system to let the individual know that something is wrong in the body. Pain may be dull or sharp. Pain can take many forms, and be localized...
2019年3月28日 · Recombinant proteins are formed by transfecting foreign genes into a host cell. Recombinant proteins are commonly used to produce pharmaceutical products, protein-based polymers for drug delivery...
6 天前 · Efficient multi-site genome editing with retron-derived multitrons. Genome editing has become a widely adopted technology to modify DNA in cells, allowing scientists to study diseases in the lab ...
2020年1月15日 · Superman syndrome, also known as 47, XYY, is a condition classified as a chromosomal aneuploidy (which is an abnormality in chromosome structure and/or number) in which males have an additional Y...
