science

Triatoma brasiliensis

Triatoma brasiliensis 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 Triatoma brasiliensis rather than just read about it. In short: Triatoma brasiliensis is now considered the most important Chagas disease vector in the semiarid areas of northeastern Brazil. T. brasiliensis occurs in 12 Brazilian states, including Maranhão, Piauí, Ceará, Rio Grande do Norte, and Paraíba.

Key takeaways

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

Reference excerpt

Triatoma brasiliensis is now considered the most important Chagas disease vector in the semiarid areas of northeastern Brazil. T. brasiliensis occurs in 12 Brazilian states, including Maranhão, Piauí, Ceará, Rio Grande do Norte, and Paraíba. T. brasiliensis is native to this part of Brazil, and thus persists in the natural environment. This species of Kissing Bug has the greatest potential to spread Chagas disease due to its distribution over large areas where numerous people reside. Triatoma species are commonly called Kissing Bugs because they bite around the mouth where skin is thinner. T. brasiliensis also has the greatest potential to colonize new areas and spread throughout northeastern parts of Brazil. This makes control problematic (see #Control below).

Life Cycle Female triatomids deposit small eggs in secluded areas. After 8 to 10 days the first of five nymph stages emerges. A full blood meal is required before continuing onto the next nymph state. The cycle from egg to adult can take up to two years in nature. Adults are obligate blood feeders that feed primarily at night and hide during the day. T. brasiliensis becomes infected with Trypanosoma cruzi when they feed on infected hosts such as humans, dogs, cats, and other mammals. T. brasiliensis then transfers T. cruzi through feces on the new host's skin. It is not known how long the adults can survive in the wild but an infected bug can serve as a vector for up to three years.

Control The current control method of Chagas disease is to control the vector population. The control strategies against this vector are very complex due to its capacity to infest natural and artificial environments presenting high levels of population density. Simple spraying methods are not as effective for T. brasiliensis as they are for other Triatoma species. Suggested methods of control currently include spraying more frequently with higher surveillance or to devise a strategy that attacks T. brasiliensis in sylvatic foci such as spraying palm trees.

References

Notes B. F. Eldridge, J. D. Edman. Medical Entomology: A Textbook on Public Health and Veterinary Problems Caused by Arthropods. Great Briton: MPG Books Limited, Bodmin, Cornwall, 2004. Print. Costa, J; Almeida, CE; Dotson, EM; Lins, A; Vinhaes, M; Silveira, AC; Beard, CB (2003a). "The epidemiologic importance of Triatoma brasiliensis as a Chagas disease vector in Brazil: a revision of domiciliary captures during 1993-1999". Mem Inst Oswaldo Cruz. 98 (4): 443–449. doi:10.1590/s0074-02762003000400002. hdl:1807/8079. PMID 12937751. Costa, J.; Dornak, L.; Almeida, C.; Peterson, A. (2014). "Distributional potential of the Triatoma brasiliensis species complex at present and under scenarios of future climate conditions". Parasites & Vectors. 7: 238. doi:10.1186/1756-3305-7-238. PMC 4046994. PMID 24886587. Costa, J; Almeida, CE; Dujardin, JP; Beard, CB (2003b). "Crossing experiments detect genetic incompatibility among populations of Triatoma brasiliensis Neiva, 1911 (Heteroptera, Reduviidae, Triatominae)". Mem Inst Oswaldo Cruz. 98 (5): 637–639. doi:10.1590/s0074-02762003000500009. PMID 12973530. Lent, H; Wygodzinsky, P (1979). "Revision of the Triatominae (Hemiptera, Reduviidae), and their significance as vectors of Chagas disease". Bull Am Mus Nat Hist. 163: 123–520. Diotaiuti, L; Faria-Filho, OF; Carneiro, FC; Dias, JC; Pires, HH; Schofield, CJ (2000). "Aspectos operacionais do controle de Triatoma brasiliensis". Cad Saúde Pública. 16 (Supl. 2): 61–67. doi:10.1590/S0102-311X2000000800006. Miles, Michael A; Feliciangeli, M Dora; Antonieta (2003). "American Trypanosomiasis (Chagas' Disease) and the Role of Molecular Epidemiology in Guiding Control Strategies". British Medical Journal. 326 (7404): 1444–1448. doi:10.1136/bmj.326.7404.1444. PMC 1126319. PMID 12829559.

Illustrations

Worked examples

Example 1 — a first encounter with Triatoma brasiliensis

Start with the simplest possible case. Write down what Triatoma brasiliensis 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 Triatoma brasiliensis 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 Triatoma brasiliensis 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 Triatoma brasiliensis

In research: Triatoma brasiliensis 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 Triatoma brasiliensis 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: Triatoma brasiliensis is common in secondary-school and first-year university syllabi. It links to neighbouring topics Hemiptera of South America, Insect vectors of human pathogens, Insects described in 1911, so understanding it makes those chapters shorter.
In everyday life: Look for Triatoma brasiliensis 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 Triatoma brasiliensis in 20 minutes

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

Frequently asked questions

What is Triatoma brasiliensis in simple terms?

Why does Triatoma brasiliensis 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 Triatoma brasiliensis?

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 Triatoma brasiliensis.