biology

Porcine intestinal spirochaetosis

Porcine intestinal spirochaetosis 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 Porcine intestinal spirochaetosis rather than just read about it. In short: Porcine intestinal spirochaetosis is a notifiable pig disease caused by certain spirochetal bacteria (Brachyspira hyodysenteriae and Brachyspira pilosicoli. Infection causes mild gastrointestinal signs in young pigs and can also be transmitted as intestinal spirochetosis in humans, as it is a zoonosis.

Key takeaways

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

Reference excerpt

Porcine intestinal spirochaetosis is a notifiable pig disease caused by certain spirochetal bacteria (Brachyspira hyodysenteriae and Brachyspira pilosicoli. Infection causes mild gastrointestinal signs in young pigs and can also be transmitted as intestinal spirochetosis in humans, as it is a zoonosis. The disease is widespread in pig-rearing countries and may be referred to as PIS, spirochaetal diarrhoea and porcine colonic spirochaetosis.

Clinical signs and diagnosis Clinical signs are most commonly seen in young pigs aged eight to 14 weeks. Normally, a greyish diarrhoea is seen in individual piglets, and poor growth rates and feed conversion ratios are observed on a herd level. Stress, caused by moving and mixing groups of piglets, can increase incidence. A definitive diagnosis can be made by culturing the bacterium on a specific blood agar medium, followed by PCR. Alternatively, necropsy and histological examination of the large intestine can confirm the diagnosis.

Treatment and control Antibiotics are the treatment of choice. They should be administered by injection or in drinking water. Pig husbandry measures should be employed to ensure that stressors such as the mixing and moving of pigs are kept to a minimum to reduce disease incidence.

References Porcine Intestinal Spirochaetosis, reviewed and published by WikiVet at http://en.wikivet.net/Porcine_Intestinal_Spirochaetosis, accessed 19/09/2011.

Worked examples

Example 1 — a first encounter with Porcine intestinal spirochaetosis

Start with the simplest possible case. Write down what Porcine intestinal spirochaetosis 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 Porcine intestinal spirochaetosis 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 Porcine intestinal spirochaetosis 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 Porcine intestinal spirochaetosis

In research: Porcine intestinal spirochaetosis 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 Porcine intestinal spirochaetosis 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: Porcine intestinal spirochaetosis is common in secondary-school and first-year university syllabi. It links to neighbouring topics Bacterial diseases, Swine diseases, Veterinary medicine stubs, so understanding it makes those chapters shorter.
In everyday life: Look for Porcine intestinal spirochaetosis 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 Porcine intestinal spirochaetosis in 20 minutes

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

Frequently asked questions

What is Porcine intestinal spirochaetosis in simple terms?

Why does Porcine intestinal spirochaetosis 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 Porcine intestinal spirochaetosis?

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 Porcine intestinal spirochaetosis.