science

Helicobacter bilis

Helicobacter bilis 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 Helicobacter bilis rather than just read about it. In short: Helicobacter bilis is a bacterium in the Helicobacteraceae family, Campylobacterales order. It is a fusiform bacterium with three to 14 multiple bipolar sheathed flagella and periplasmic fibers wrapped around the cell.

Key takeaways

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

Reference excerpt

Helicobacter bilis is a bacterium in the Helicobacteraceae family, Campylobacterales order. It is a fusiform bacterium with three to 14 multiple bipolar sheathed flagella and periplasmic fibers wrapped around the cell. It is resistant to cephalothin and nalidixic acid, but sensitive to metronidazole. Like Helicobacter hepaticus, it colonizes the bile, liver, and intestine of mice, and is associated with multifocal chronic hepatitis and hepatocellular tumors. This strain was originally isolated from a 47-year-old man with a one-month history of diarrhea, fever, and lower abdominal pain, and designated Flexispira rappini Romero et al. 1988. Hänninen et al. (2005) proposed to include this taxon in the species Helicobacter bilis, although based on 16S rRNA gene sequence, it is one of 10 distinct groups, which has been called Helicobacter sp. flexispira taxon 8 (provisionally Helicobacter rappini) [Dewhirst et al. 2000]. H. rappini has also been isolated from the feces of healthy people, dogs, and mice, as well as from patients with bacteremia. H. bilis and the other taxa include isolates from a wide range of host species, and have been associated with diarrhea, hepatitis, cholangitis, gallstones, liver cancer, and ovine abortion.

References

Further reading Kostomitsopoulos N, Donnelly H, Kostavasili I, Paronis E, Alexakos P, Karayannacos P (May 2007). "Eradication of Helicobacter bilis and H. hepaticus from infected mice by using a medicated diet". Lab Animal. 36 (5): 37–40. doi:10.1038/laban0507-37. PMID 17450169. S2CID 26505981. Whary MT, Fox JG (2006). "Detection, eradication, and research implications of Helicobacter infections in laboratory rodents". Lab Animal. 35 (7): 25–7, 30–6. doi:10.1038/laban0706-25. PMID 16807564. S2CID 33577881. Lemke, L. B.; Ge, Z.; Whary, M. T.; Feng, Y.; Rogers, A. B.; Muthupalani, S.; Fox, J. G. (2009). "Concurrent Helicobacter bilis Infection in C57BL/6 Mice Attenuates Proinflammatory H. pylori-Induced Gastric Pathology". Infection and Immunity. 77 (5): 2147–2158. doi:10.1128/IAI.01395-08. ISSN 0019-9567. PMC 2681733. PMID 19223483. Hanninen, M.-L. (2005). "Extension of the species Helicobacter bilis to include the reference strains of Helicobacter sp. flexispira taxa 2, 3 and 8 and Finnish canine and feline flexispira strains". International Journal of Systematic and Evolutionary Microbiology. 55 (2): 891–898. doi:10.1099/ijs.0.63245-0. ISSN 1466-5026. PMID 15774681.

External links "Helicobacter bilis". The Encyclopedia of Life. Type strain of Helicobacter bilis at BacDive - the Bacterial Diversity Metadatabase

Illustrations

Worked examples

Example 1 — a first encounter with Helicobacter bilis

Start with the simplest possible case. Write down what Helicobacter bilis 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 Helicobacter bilis 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 Helicobacter bilis 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 Helicobacter bilis

In research: Helicobacter bilis 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 Helicobacter bilis 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: Helicobacter bilis is common in secondary-school and first-year university syllabi. It links to neighbouring topics Bacteria described in 1995, Campylobacterota, Campylobacterota stubs, so understanding it makes those chapters shorter.
In everyday life: Look for Helicobacter bilis 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 Helicobacter bilis in 20 minutes

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

Frequently asked questions

What is Helicobacter bilis in simple terms?

Why does Helicobacter bilis 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 Helicobacter bilis?

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 Helicobacter bilis.