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New Ways for Poor Countries to Diagnose Infectious Diseases
This is the VOA Special English DEVELOPMENT REPORT.
Two new discoveries could offer easier ways to identify infectious diseases ∈ developing countries.
The first involves sheep. Researchers have found that hair sheep are a good source of blood for use ∈ tests to diagnose infectious diseases ∈ people. […]
Ellen Yeh, from the Stanford University School of Medicine, ∈California, was one of the authors of the study. She explains the problems with using human blood.
ELLEN YEH: "First off, there is the infectious disease risk because if you use human blood there's a lot of transmissible diseases. In particular, ∈Africa, you'd be worried about things like HIV The other big problem with using human blood for making these blood agar plates is that they're actually not accurate." […]
The study found that blood from hair sheep is an excellent substitute. It produced the same results as tests using wool sheep and horses.
Also, hair sheep require less care than wool sheep. They could better handle hot, dry climates because they do not have a lot of wool. It also means they do not need to be sheared.
ELLEN YEH: "Having to shear the sheep for wool is actually very costly and labor intensive. The other advantages of hair sheep include that it's more resistant to parasites, so they're less prone to infection."
The scientists also tested an easier, cheaper way to prepare and process the blood. They found this new method effective. The blood can be collected directly into bags, much like with human donors. […]
The same journal also published a report ∈July on an experimental device called the CellScope. The CellScope is a cell phone microscope. Engineers at the University of California, Berkeley, developed it.
They attached small microscope lenses to a holder fitted to a mobile phone. The phone's camera was able to take color images of malaria parasites and tuberculosis bacteria ∈ blood and sputum. The team used a special dye and special lighting to make the images bright.
The pictures could also be sent wirelessly to distant experts for diagnosis. […]
Disponível em: <http://www.manythings.org/voa/medical/5123>.html. Access on: 20.06.2017.
They attached small microscope lenses to a holder fitted to a mobile phone. The phone's camera was able to take color images of malaria parasites and tuberculosis bacteria ∈ blood and sputum. The team used a special dye and special lighting to make the images bright.
The pictures could also be sent wirelessly to distant experts for diagnosis. […]
Disponível em: <http://www.manythings.org/voa/medical/5123>.html. Access on: 20.06.2017.
Read the text and choose the best alternative.
I. There are more and better ways to diagnose diseases ∈ poor countries.
II. Hair from many animals is used to diagnose diseases ∈ poor people.
III. Shaving wool from sheep is very expensive and hard work.
IV. An easier and cheaper way of collecting blood into bags was tested by scientists.
V. Cell phone’s camera can take pictures of diseases from blood and sputum and be sent to farther away places for diagnosis.
