PubMed Health⌕ Search
Home/Archive/PubMed

PubMed · 12268813

Regional population growth rate differences: note.

E Nissan·R Caveny
View original source ↗Export metadata ↓

Abstract

"This note investigates regional population growth in the U.S. for 1959-84, taking into account four city sizes and three time periods. It is found that the growth is largest in city size (0.5-1.0) million and (1.0-2.0) million. Over time, the growth is largest in the less urbanized regions." The note aims to supplement the findings of Daniel Garnick and is based on data from the U.S. Bureau of Economic Analysis.

Explore related subjects

AmericasDemographyDeveloped CountriesDeveloping CountriesGeographyNorth AmericaPopulationPopulation CharacteristicsPopulation DynamicsPopulation GrowthSuburban PopulationUnited StatesUrban PopulationComparative StudiesDemographic FactorsGeographic FactorsNonmetropolitan PopulationNorthern AmericaComparative StudyJournal Article

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

E Nissan, R Caveny. 1988. Regional population growth rate differences: note.. https://doi.org/10.1111/j.1468-2257.1988.tb00463.x

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

PubMed2018

Replication of Zika Virus in Human Prostate Cells: A Potential Source of Sexually Transmitted Virus.

BACKGROUND: While Zika virus (ZIKV) is mainly transmitted by mosquitoes, numerous cases of sexual transmission have been reported during recent outbreaks. Little is known about which host cell types or entry factors aid in mediating this sexual transmission. METHODS: In this study, we investigated ZIKV cell tropism by infecting 2 types of human prostate cells with 3 contemporary ZIKV isolates from persons infected in the Americas. We used real-time quantitative polymerase chain reaction and immunofluorescence analyses to measure infection and flow cytometry to detect entry factor expression. RESULTS: Here we show that ZIKV infects, replicates, and produces infectious virus in prostate stromal mesenchymal stem cells, epithelial cells, and organoids made with a combination of these cells. We also show that prostate cells express several well-characterized flavivirus attachment factors. In contrast, dengue virus does not infect or does not replicate in these prostate cells, although it is known to use similar receptors. CONCLUSIONS: Our results indicate that ZIKV favors infection of stromal cells more so than epithelial cells in organoids, possibly indicating a preference for stem cells in general. Overall, these results suggest that ZIKV replication occurs in the human prostate and can account for ZIKV secretion in semen, thus leading to sexual transmission.

Americas↗
PubMed2003

Monitoring measles eradication in the region of the Americas: critical activities and tools.

The purpose of this paper is to discuss methods recommended and used by the Pan American Health Organization (PAHO) to monitor the interruption of indigenous measles transmission in the Region of the Americas. The methods used include house-to-house monitoring of vaccination coverage as a supervisory tool during both campaigns and routine vaccination; thoroughly investigating all measles outbreaks; performing routine surveillance, including weekly reporting from at least 80% of reporting units; and validating routine surveillance through active-case searches at health care institutions and schools and in the community. The strategies described have helped PAHO to increase the authority and accountability of vaccine program managers at the local, provincial, and national levels. Their efforts have permitted the Region of the Americas to reduce to three the number of countries with indigenous measles transmission and to reach a record low of 503 measles cases in 2001.

Americas↗
PubMed2003

The Measles Laboratory Network in the region of the Americas.

The success of measles eradication depends upon a laboratory network to rapidly analyze samples obtained as part of surveillance and case investigation. The Pan American Measles Laboratory Network was established in 1995. Major activities of the 22 participating laboratories include the rapid testing of serum samples to diagnose measles, analysis and recommendation of techniques to be used in serologic testing, training in virus isolation, and procurement and distribution of laboratory materials. In addition, a comprehensive quality-control program and an electronic communication network have been developed. Testing for rubella has also been incorporated. The Network has been crucial to the great progress made toward eradicating measles from the Western Hemisphere. The priority given to the laboratories in the Network must continue in order to ensure that the eradication goal is reached and that validation of the interruption of endemic transmission of measles is documented.

Americas↗