science

Ketolide

Ketolide is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Ketolide rather than just read about it. In short: Ketolides are antibiotics belonging to the macrolide group. Ketolides are derived from erythromycin by substituting the cladinose sugar with a keto-group and attaching a cyclic carbamate group in the lactone ring.

Key takeaways

Ketolide belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Ketolide to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Ketolide from memory before moving on to harder problems.

Reference excerpt

Ketolides are antibiotics belonging to the macrolide group. Ketolides are derived from erythromycin by substituting the cladinose sugar with a keto-group and attaching a cyclic carbamate group in the lactone ring. These modifications give ketolides much broader spectrum than other macrolides. Moreover, ketolides are effective against macrolide-resistant bacteria, due to their ability to bind at two sites at the bacterial ribosome as well as having a structural modification that makes them poor substrates for efflux-pump mediated resistance. Ketolides block protein synthesis by binding to ribosomal subunits and may also inhibit the formation of newly forming ribosomes. According to a recent study comparing the action of the classic macrolides erythromycin and azithromycin with ketolides, which are used to treat serious infections, the more powerful drugs (ketolides) were the more "leaky" in blocking the production of proteins. The researchers were surprised to discover that ketolides, which are known to be better antibiotics, allow for many more proteins to be made compared to the older, less efficient macrolides. As a result, it is now believed that allowing cells to make some proteins could be much more damaging for a microbe than not letting it make any proteins at all. The findings may point the way to better and more potent antibiotics. The only ketolide on the market at this moment is telithromycin, which is sold under the brand name of Ketek. Other ketolides in development include cethromycin and solithromycin.

Medical uses Ketolides are used to treat community-acquired bacterial pneumonia. Other respiratory tract infections were removed as indications when it was recognized that use of telithromycin can result in hepatitis and liver failure.

References

Illustrations

Worked examples

Example 1 — a first encounter with Ketolide

Start with the simplest possible case. Write down what Ketolide claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Ketolide before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Ketolide ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Ketolide

In research: Ketolide appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Ketolide in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Ketolide is common in secondary-school and first-year university syllabi. It links to neighbouring topics Fourteen-membered rings, Ketolide antibiotics, so understanding it makes those chapters shorter.
In everyday life: Look for Ketolide outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Ketolide” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Ketolide in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Ketolide means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Ketolide out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Ketolide in simple terms?

Why does Ketolide matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Ketolide?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Ketolide.