What is inoculating loops and needles?

What is inoculating loops and needles?

Inoculating loops and needles consist of a handle with a terminal loop or needle which is designed to pick up and transfer a small quantity of inoculum (typically 1 to 10μL) from a donor culture to the growth medium of choice. Some loops are calibrated and colour-coded to transfer semi-quantitative amounts of inoculum.

What is an inoculating needle used for?

An inoculation needle is a laboratory equipment used in the field of microbiology to transfer and inoculate living microorganisms. It is one of the most commonly implicated biological laboratory tools and can be disposable or re-usable.

How does a inoculation loop work?

A tool usually made of platinum or nichrome wire in which the tip forms a small loop with a diameter of about 5 mm, and is used to smear, streak, or take an inoculum from, a culture of microorganisms.

What is wire loop definition?

A node (wire) that crosses the boundaries between hierarchical design files and feeds back to itself without passing through any logic.

What are disposable loops?

Sterile, disposable inoculating loops do not require flaming. Loops are made from a plastic resin that provides controlled flexibility. They resist cutting the agar surface yet provide sufficient firmness to pick stubborn colonies.

What is the difference between inoculating loop and inoculating needle?

An inoculation needle is used for retrieving solid or dense media. An inoculation loop is used to retrieve liquid media.

How is an inoculating loop or needle sterilized prior to use?

How is an inoculating loop or needle sterilized prior to use? Inoculating loops and needles are typically sterilized by holding in the flame of a Bunsen burner until red-hot.

What are circular needles?

Circular needles are the perfect choice for knitting in the round and also knitting flat pieces. They consist of a needle tip on each end with a cord joining them. These are used for projects like hats, sweaters, socks, sleeves, mittens and more.

Why use an inoculating needle vs inoculating loop?

How do you make an inoculation loop?


  1. Hold the wire of an inoculation loop in the flame of a Bunsen burner until the wire is bright red.
  2. Using the flamed loop, pick up a small amount of bacteria—either from bacteria growing on a plate or from bacteria in liquid culture.
  3. Spread the bacteria on a new agar plate.
  4. Flame the loop again.


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