biology

Vibrio campbellii

Vibrio campbellii 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 Vibrio campbellii rather than just read about it. In short: Vibrio campbellii is a Gram-negative, curved rod-shaped, marine bacterium closely related to its sister species, Vibrio harveyi. Vibrio campbellii is an emerging pathogen in aquatic organisms.

Key takeaways

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

Reference excerpt

Vibrio campbellii is a Gram-negative, curved rod-shaped, marine bacterium closely related to its sister species, Vibrio harveyi. Vibrio campbellii is an emerging pathogen in aquatic organisms.

Biology Quorum sensing allows the bacterium to communicate with autoinducers, a chemical signaling molecule that is secreted. Some strains of V. campellii are known to be not luminescent; these strains are thought to be less virulent than the luminescent strains. Bioluminescence in bacteria is due to the reaction: FMNH− + H+ + RCHO + O2 → FMN + RCOOH + H2O + hν and is catalyzed by the enzyme luciferase. A new luciferase was isolated from V. campbellii (Lux_Vc) and is similar to that of the Lux_Vh found in V. harveyi, but is more thermodynamically stable due to the binding of reduced FMN.

The V. campbellii strains PEL22A, BAA-1116, AND4 are known to be mixotrophic or more specifically photo(organo)heterotrophic. This is considered a rare phenotype in Vibrio and is thought to be caused by their exploitation of lateral gene transfer during adaptation.

Pathogenesis The causes of virulence can vary depending on different strains. The PEL22A strain showed that the genes that regulate the bacteriophage CTXΦ, the main cause of virulence in Vibrio cholerae, were present but lack the genes for cholera toxin, ctxA and ctxB. The strain did contain hlyA gene which codes for hemolysin, an endotoxin found in most Vibrio species.

References

External links Type strain of Vibrio campbellii at BacDive - the Bacterial Diversity Metadatabase

Worked examples

Example 1 — a first encounter with Vibrio campbellii

Start with the simplest possible case. Write down what Vibrio campbellii 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 Vibrio campbellii 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 Vibrio campbellii 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 Vibrio campbellii

In research: Vibrio campbellii 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 Vibrio campbellii 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: Vibrio campbellii is common in secondary-school and first-year university syllabi. It links to neighbouring topics Bacteria described in 1981, Gram-negative bacteria, Marine microorganisms, so understanding it makes those chapters shorter.
In everyday life: Look for Vibrio campbellii 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 Vibrio campbellii in 20 minutes

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

Frequently asked questions

What is Vibrio campbellii in simple terms?

Vibrio campbellii is a Gram-negative, curved rod-shaped, marine bacterium closely related to its sister species, Vibrio harveyi. Vibrio campbellii is an emerging pathogen in aquatic organisms.

Why does Vibrio campbellii 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 Vibrio campbellii?

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 Vibrio campbellii.