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Diagnosing active tuberculosis based only on signs and symptoms is difficult, as is diagnosing the disease in those who are immunosuppressed. A diagnosis of TB should, however, be considered in those with signs of lung disease or constitutional symptoms lasting longer than two weeks. A chest X-ray and multiple sputum cultures for acid-fast bacilli are typically part of the initial evaluation. Interferon-γ release assays and tuberculin skin tests are of little use in the developing world. IGRA have similar limitations in those with HIV.
What kind of tests are common in developing countries?
A: unanswerable

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Tourism accounts for much of Uruguay's economy. Tourism in Montevideo is centered in the Ciudad Vieja area, which includes the city's oldest buildings, several museums, art galleries, and nightclubs, with Sarandí Street and the Mercado del Puerto being the most frequented venues of the old city. On the edge of Ciudad Vieja, Plaza Independencia is surrounded by many sights, including the Solís Theatre and the Palacio Salvo; the plaza also constitutes one end of 18 de Julio Avenue, the city's most important tourist destination outside of Ciudad Vieja. Apart from being a shopping street, the avenue is noted for its Art Deco buildings, three important public squares, the Gaucho Museum, the Palacio Municipal and many other sights. The avenue leads to the Obelisk of Montevideo; beyond that is Parque Batlle, which along with the Parque Prado is another important tourist destination. Along the coast, the Fortaleza del Cerro, the Rambla (the coastal avenue), 13 kilometres (8.1 mi) of sandy beaches, and Punta Gorda attract many tourists, as do the Barrio Sur and Palermo barrios.
Where is tourism in Montevideo centered in?
A: Ciudad Vieja area

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The College's endowment is sub-divided into three distinct portfolios: (i) Unitised Scheme – a unit trust vehicle for College, Faculties and Departments to invest endowments and unfettered income to produce returns for the long term; (ii) Non-Core Property – a portfolio containing around 120 operational and developmental properties which College has determined are not core to the academic mission; and (iii) Strategic Asset Investments – containing College’s shareholding in Imperial Innovations and other restricted equity holdings. During the year 2014/15, the market value of the endowment increased by £78 million (18%) to £512.4 million on 31 July 2015.
How much did the market value of the endowment increase by during the year 2014/2015?
A: £78 million

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For decades, the U.S. federal government strenuously tried to force Puerto Ricans to adopt English, to the extent of making them use English as the primary language of instruction in their high schools. It was completely unsuccessful, and retreated from that policy in 1948. Puerto Rico was able to maintain its Spanish language, culture, and identity because the relatively small, densely populated island was already home to nearly a million people at the time of the U.S. takeover, all of those spoke Spanish, and the territory was never hit with a massive influx of millions of English speakers like the vast territory acquired from Mexico 50 years earlier.
When did the U.S. government retreat from the policy of making Puerto Ricans use Spanish?
A:
unanswerable