1) What are spread plates? 2) How do you perform a colony count to find the CFUs in the original stock (inoculum)? 3) How do spread plates differ from streak plates (streaking for isolation)

A century ago, the top three causes of death were infectious diseases. More than half of all people dying in the United States died because of germs. Today, they account for a few percent of deaths at most.

In this video we discuss in detail the functions of the vermiform appendix (or simply, appendix) and the process of developing an appendicitis.

At the end, we briefly mention two other secondary lymphoid structures (tonsils and...

Microbiology: MacConkey Agar

Los dos son pequeñitos y siempre que pensamos en ellos pensamos en enfermedades, pero virus y bacterias son muy diferentes.

Bacterias y virus son diferentes. Las bacterias son células más grandes, visibles bajo un...

The story of the real Typhoid Mary - In the early 1900s, germ theory was a relatively new concept, and many – including doctors – were unaware of how diseases spread. At the time, bacterial diseases like typhoid and dysentery could still...

The Chlorophyll Cycle

Yogurt is a popular, milk-based food and cosmetic product. It is believed to have originated in Central Europe thousands of years ago. Learn more about where yogurt comes from and the many ways people consume it. Then try making your own...

The video highlights the importance of quickly diagnosing and isolating people carrying infectious diseases to prevent their global spread. It introduces a small machine called the Micro Kit, designed by Professor Jackie Ying and her...

Bacteria are the most abundant living things on the planet. In fact there are more bacteria in your mouth than there are vertebrates on the planet. This fascinating series of videos explores the wide-ranging forms and characteristics of...

Gonorrhea is the second-most common sexually transmitted infection, or STI, in the world. What is the pathogen responsible for this infection, how was it discovered, and precisely what does it do in the body? Let's answer these questions...

The Sea of Marmara is blighted by large areas that are covered in a thick, white mucus-like sludge.

The Highs and Lows of Tardigrade Pregnancy

In this video, we explore the theory and interpretation of results for the lecithinase test in microbiology.

The Secret Things Living In Your Drains

The big Roomba of the microcosmos is fascinating to watch as it lives its sink or swim life.