science

Human adenovirus 41

Human adenovirus 41 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 Human adenovirus 41 rather than just read about it. In short: Human adenovirus 41 (HAdV-F41), is an enteric adenovirus, a nonenveloped virus with an icosahedral nucleocapsid containing a double-stranded DNA genome. It can particularly target the gastrointestinal tract to cause gastroenteritis, with symptoms similar to rotavirus gastroenteritis and norovirus.

Key takeaways

Human adenovirus 41 belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Human adenovirus 41 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Human adenovirus 41 from memory before moving on to harder problems.

Reference excerpt

Human adenovirus 41 (HAdV-F41), is an enteric adenovirus, a nonenveloped virus with an icosahedral nucleocapsid containing a double-stranded DNA genome. It can particularly target the gastrointestinal tract to cause gastroenteritis, with symptoms similar to rotavirus gastroenteritis and norovirus. It may be present in the gut without causing symptoms and can be detected by using molecular based assays and enzyme immunoassay. As of August 2022, human adenovirus 41 has been identified in a majority of small children with hepatitis of unknown cause in 2 case series.

Classification Human adenovirus 41 belongs to the Adenoviridae family, and along with Human adenovirus 40, is a member of species Mastadenovirus faecale.

Pathology It can particularly target the gastrointestinal tract to cause gastroenteritis in very young children. Symptoms appear similar to rotavirus gastroenteritis and norovirus. It may be present in the gut without causing symptoms. In an investigation of 5 children with an inflammation of the liver (hepatitis) of unknown cause at Birmingham, Alabama in October 2021, all turned out to have human adenovirus 41. In August 2022, 9 children in a U.S. case series of hepatitis of unknown cause and 27 of 30 children in a U.K. case series with hepatitis of unknown cause who underwent molecular testing tested positive for human adenovirus type 41 in a sample. It was unclear whether human adenovirus 41 was the cause, however.

Diagnosis It cannot be detected using traditional cell culture isolation, but can be detected by using molecular based assays and enzyme immunoassay.

Epidemiology Globally it is a significant cause of gastroenteritis, particularly in low and middle income countries, but less common than rotavirus and norovirus. How frequently it occurs in sewage and drinking water is not known. Type 40 is less common.

History It was first identified in 1983.

References

Further reading de Jong, J. C.; Wigand, R.; Kidd, A. H.; Wadell, G.; Kapsenberg, J. G.; Muzerie, C. J.; Wermenbol, A. G.; Firtzlaff, R. G. (1983). "Candidate adenoviruses 40 and 41: fastidious adenoviruses from human infant stool". Journal of Medical Virology. 11 (3): 215–231. doi:10.1002/jmv.1890110305. ISSN 0146-6615. PMID 6306161. S2CID 31148587.

Worked examples

Example 1 — a first encounter with Human adenovirus 41

Start with the simplest possible case. Write down what Human adenovirus 41 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 Human adenovirus 41 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 Human adenovirus 41 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 Human adenovirus 41

In research: Human adenovirus 41 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 Human adenovirus 41 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: Human adenovirus 41 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Adenoviridae, so understanding it makes those chapters shorter.
In everyday life: Look for Human adenovirus 41 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.

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How to study Human adenovirus 41 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Human adenovirus 41 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 Human adenovirus 41 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Human adenovirus 41 in simple terms?

Why does Human adenovirus 41 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 Human adenovirus 41?

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 Human adenovirus 41.