biology

Shewanella haliotis

Shewanella haliotis is a biology 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 Shewanella haliotis rather than just read about it. In short: Shewanella haliotis, a species of rod-shaped, Gram-negative, facultatively anaerobic bacteria, was first isolated from the gut microflora of abalone (large edible sea snails) collected from the ocean near Yeosu, South Korea, by Kim et al. in 2007. Further studies showed the cells to be catalase- and oxidase-positive.

Key takeaways

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

Reference excerpt

Shewanella haliotis, a species of rod-shaped, Gram-negative, facultatively anaerobic bacteria, was first isolated from the gut microflora of abalone (large edible sea snails) collected from the ocean near Yeosu, South Korea, by Kim et al. in 2007. Further studies showed the cells to be catalase- and oxidase-positive. The species epithet haliotis is a reference to the genus name of abalone, Haliotis. The genus Shewanella had been previously named in 1985 by MacDonell and Colwell in honor of Scottish microbiologist James M. Shewan, for his work in fisheries microbiology.

Characteristics A sample colony of S. haliotis was isolated from an abalone. It was pink-orange in colour, grew at 42 °C in the pH range 5–11 (with optimum pH being 7). It was found to be positive for malate as a carbon source, and negative for mannose and glucose use. The strain was resistant to both penicillin and vancomycin.

Human pathologies

The route of Shewanella infection is associated with direct contact with the organism through seawater or ingestion of raw seafood, causing severe soft tissue infection. One case of infection was found to be susceptible to ciprofloxacin (0.25 mg/L), piperacillin-tazobactam (1.0 mg/L), ceftriaxone (1.0 mg/L), and meropenem (0.38 mg/L). The patient had fever for the first 2 days of hospitalization. After 2 weeks of treatment, the antimicrobial drug was switched to oral ciprofloxacin; treatment was continued after dressing and debridement of the fasciotomy wound.

References

Contains public domain text from the CDC

External links Type strain of Shewanella haliotis at BacDive - the Bacterial Diversity Metadatabase

Worked examples

Example 1 — a first encounter with Shewanella haliotis

Start with the simplest possible case. Write down what Shewanella haliotis claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, 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 Shewanella haliotis 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 Shewanella haliotis 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 Shewanella haliotis

In research: Shewanella haliotis appears in biology 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 Shewanella haliotis 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: Shewanella haliotis is common in secondary-school and first-year university syllabi. It links to neighbouring topics Alteromonadales, Alteromonadales stubs, Bacteria described in 2007, so understanding it makes those chapters shorter.
In everyday life: Look for Shewanella haliotis 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 Shewanella haliotis in 20 minutes

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

Frequently asked questions

What is Shewanella haliotis in simple terms?

Why does Shewanella haliotis matter?

Because it connects several biology 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 Shewanella haliotis?

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 Shewanella haliotis.