biology

Severe fever with thrombocytopenia syndrome

Severe fever with thrombocytopenia syndrome 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 Severe fever with thrombocytopenia syndrome rather than just read about it. In short: Severe fever with thrombocytopenia syndrome (SFTS) is a tick-borne infection caused by Dabie bandavirus also known as the SFTS virus, first reported between late March and mid-July 2009 in rural areas of Hubei and Henan provinces in Central China. It is an emerging infectious disease causing fever, vomiting, diarrhea, loss of consciousness and haemorrhage.

Key takeaways

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

Reference excerpt

Severe fever with thrombocytopenia syndrome (SFTS) is a tick-borne infection caused by Dabie bandavirus also known as the SFTS virus, first reported between late March and mid-July 2009 in rural areas of Hubei and Henan provinces in Central China. It is an emerging infectious disease causing fever, vomiting, diarrhea, loss of consciousness and haemorrhage. SFTS has fatality rates ranging from 12% to as high as 30% in some areas due to multiple organ failure, thrombocytopenia (low platelet count), leucopenia (low white blood cell count), and elevated liver enzyme levels.

Virology SFTS virus (SFTSV) is a virus in the order Bunyavirales, discovered in 2009.

Transmission The life cycle of the SFTSV most likely involves arthropod vectors like Haemaphysalis longicornis ticks and animal hosts. Human-to-human transmission was not initially noted in the 2011, but occurs via blood or mucus as documented in 2012.

Symptoms and signs SFTS is an emerging infectious disease causing fever, vomiting, diarrhea, loss of consciousness and heamorrhage. SFTS has fatality rates ranging from 12% to as high as 30% in some areas due to multiple organ failure, thrombocytopenia (low platelet count), leucopenia (low white blood cell count), and elevated liver enzyme levels. In July 2013, South Korea reported a total of eight deaths since August 2012. In July 2017, Japanese doctors reported that a woman had died of SFTS after being bitten by a cat that may have itself been infected by a tick. The woman had no visible tick bites, leading doctors to believe that the cat — which died as well — was the transmission vector.

Epidemiology SFTS occurs in China's rural areas from March to November with the majority of cases from April to July. In 2013, Japan and Korea also reported several cases with deaths. In early 2020 an outbreak occurred in East China, more than 37 people were found with SFTS in Jiangsu province, while 23 more were found infected in Anhui province in August 2020. Seven people have died.

References

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Illustrations

Worked examples

Example 1 — a first encounter with Severe fever with thrombocytopenia syndrome

Start with the simplest possible case. Write down what Severe fever with thrombocytopenia syndrome 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 Severe fever with thrombocytopenia syndrome 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 Severe fever with thrombocytopenia syndrome 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 Severe fever with thrombocytopenia syndrome

In research: Severe fever with thrombocytopenia syndrome 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 Severe fever with thrombocytopenia syndrome 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: Severe fever with thrombocytopenia syndrome is common in secondary-school and first-year university syllabi. It links to neighbouring topics Arthropod-borne viral fevers and viral haemorrhagic fevers, Insect-borne diseases, Zoonotic viral diseases, so understanding it makes those chapters shorter.
In everyday life: Look for Severe fever with thrombocytopenia syndrome 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 Severe fever with thrombocytopenia syndrome in 20 minutes

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

Frequently asked questions

What is Severe fever with thrombocytopenia syndrome in simple terms?

Why does Severe fever with thrombocytopenia syndrome 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 Severe fever with thrombocytopenia syndrome?

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 Severe fever with thrombocytopenia syndrome.