The phylogeography of trypanosomes from South American alligatorids and African crocodilids is consistent with the geological history of South American river basins and the transoceanic dispersal of Crocodylus at the Miocene

Background: Little is known about the diversity, phylogenetic relationships, and biogeography of trypanosomes infecting non-mammalian hosts. In this study, we investigated the influence of host species and biogeography on shaping the genetic diversity, phylogenetic relationship, and distribution of trypanosomes from South American alligatorids and African crocodilids. Methods: Small Subunit rRNA (SSU rRNA) and glycosomal Glyceraldehyde Phosphate Dehydrogenase (gGAPDH) genes were employed for phylogenetic inferences. Trypanosomes from crocodilians were obtained by haemoculturing. Growth behaviour, morphology, and ultrastructural features complement the molecular description of two new species strongly supported by phylogenetic analyses. Results: The inferred phylogenies disclosed a strongly supported crocodilian-restricted clade comprising three subclades. The subclade T. grayi comprised the African Trypanosoma grayi from Crocodylus niloticus and tsetse flies. The subclade T. ralphi comprised alligatorid trypanosomes represented by Trypanosoma ralphi n. sp. From Melanosuchus niger, Caiman crocodilus and Caiman yacare from Brazilian river basins. T. grayi and T. ralphi were sister subclades. The basal subclade T. terena comprised alligatorid trypanosomes represented by Trypanosoma terena n. sp. from Ca. yacare sharing hosts and basins with the distantly genetic related T. ralphi. This subclade also included the trypanosome from Ca. crocodilus from the Orinoco basin in Venezuela and, unexpectedly, a trypanosome from the African crocodilian Osteolaemus tetraspis. Conclusion: The close relationship between South American and African trypanosomes is consistent with paleontological evidence of recent transoceanic dispersal of Crocodylus at the Miocene/Pliocene boundaries (4–5 mya), and host-switching of trypanosomes throughout the geological configuration of South American hydrographical basins shaping the evolutionary histories of the crocodilians and their trypanosomes.

The Anomalous Merging of the African and North Atlantic Jet Streams during the Northern Hemisphere Winter of 2010

The North Atlantic jet stream during winter 2010 was unusually zonal, so the typically separated Atlantic and African jets were merged into one zonal jet. Moreover, the latitude–height structure and temporal variability of the North Atlantic jet during this winter were more characteristic of the North Pacific. This work examines the possibility of a flow regime change from an eddy-driven to a mixed eddy–thermally driven jet. A monthly jet zonality index is defined, which shows that a persistent merged jet state has occurred in the past, both at the end of the 1960s and during a few sporadic months. The anomalously zonal jet is found to be associated with anomalous tropical Pacific diabatic heating and eddy anomalies similar to those found during a negative North Atlantic Oscillation (NAO) state. A Lagrangian back-trajectory diagnosis of eight winters suggests the tropical Pacific is a source of momentum to the Atlantic and African jets and that this source was stronger during the winter of 2010. The results suggest that the combination of weak eddy variance and fluxes in the North Atlantic, along with strong tropical heating, act to push the jet toward a merged eddy–thermally driven state. The authors also find significant SST anomalies in the North Atlantic, which reinforce the anomalous zonal winds, particularly in the eastern Atlantic.

Reactions of African immigrants living in Houston, Texas, to the American media and legislation regarding female circumcision

Female circumcision was almost unheard of in the United States a few years ago. The recent influx of African immigrants has increased media attention to the subject, leading to laws criminalizing female circumcision. This study examines the reactions of African immigrants living in Houston, Texas, to media portrayal and legislation regarding female circumcision in an attempt to understand the effectiveness of U.S. laws, and media messages in deterring the practice. ^ Through literature reviews the study looks at how female circumcision is portrayed in the Houston Chronicle, and gives detailed discussion of laws regarding it. Attitudes, beliefs, experiences and reactions of African immigrants towards the practice and American's perceptions of female circumcision is examined via a series of case studies. ^ Data show that media and laws portray female circumcision negatively and make little attempt to understand the cultural practice, generating outrage among Africans who would like to see changes in the practice. ^

Tobacco use among U.S. racial/ethnic minority groups : African Americans, American Indians and Alaska natives, Asian Americans and Pacific Islanders, Hispanics : a report of the Surgeon General.

Shipping list no.: 98-0250-P.

Modern medicine : its theory and practice, in original contributions by American and foreign authors /

Vols. 4-7, have imprint: Philadelphia and New York, Lea & Febiger.

The American first class book; or, Exercises in reading and recitation: selected principally from modern authors of Great Britain and America; and designed for the use of the highest class in publick and private schools.

Mode of access: Internet.

The Annual American catalog : containing a record under author, title, subject and series of all books recorded in the Publishers' weekly, 1900-1909, with a directory of publishers, authors and printers issuing books during the year; and a directory of booksellers in the principal towns of the United States and Canada.

Contents.--[v. 1] 1900-1901.--[v. 2] 1900-1902.--[v. 3] 1900-1903.--[v. 4] 1905.--[v. 5] 1906.--[v. 6] 1908.--[v. 7] 1909.

One year course in English and American literature; an introduction to the chief authors in English and American literature, with reading lists and references for further study,

Mode of access: Internet.

TRAITS OF AMERICAN HUMOR, BY NATIVE AUTHORS.

Mode of access: Internet.

Sets of standard authors, mainly in fine bindings ... ornithological books ... American maps, extra-illustrated books ... of the estates of ... Emil Winters ... and other owners ...

Mode of access: Internet.

Facts and observations relative to the participation of American citizens in the African slave trade /

Includes bibliographical references.

Thoughts on African colonization, or, An impartial exhibition of the doctrines, principles and purposes of the American Colonization Society : together with the resolutions, addresses, and remonstrances of the free people of color /

Mode of access: Internet.

An authentic narrative of the loss of the American brig Commerce, wrecked on the western coast of Africa, in the month of August, 1815, with an account of the sufferings of the surviving officers and crew, who were enslaved by the wandering Arabs, on the African desaert, or Zahahrah; and observations historical, geographical, &c. made during the travels of the author, while a slave to the Arabs, and in the empire of Morocco ...

Bound in brown leather; stamped in gold and blind.

American popular lessons, chiefly selected from the writings of Mrs. Barbauld, Miss Edgeworth, and other approved authors. Designed particularly for the younger classes of children in schools.

Mode of access: Internet.

History of the American Baptist African and Haytien missions : for the use of sabbath schools /

Half title: African and Haytien mission.