Notes on Water Analyses in the Tropics, by E. P. MINETT, M.D. D.P.H., D.T.M. AND H., Assistant Government Bacteriologist, British Guiana (MEMBER)

1911 ◽  
Vol 32 (9) ◽  
pp. 478-480
Keyword(s):  
British Guiana ◽  
Water Analyses ◽  
The Tropics

scholarly journals Tagalis inornata cubensis McAtee & Malloch (Hemiptera: Heteroptera: Reduviidae: Saicinae): First record from the continental United States

Zootaxa ◽  
2008 ◽  
Vol 1912 (1) ◽  
pp. 66-68 ◽  
Author(s):  
ROBERT L. BLINN
Keyword(s):  
United States ◽  
Puerto Rico ◽  
Costa Rica ◽  
New World ◽  
First Record ◽  
British Guiana ◽  
The Tropics

The New World genus Tagalis Stål is widely distributed in the tropics, being known from only three species: T. seminigra Champion from British Guiana, Panama, Peru, and Venezuela; T. inornata Stål from Brazil, Costa Rica, Cuba, Guatamala, Granada, Mexico, Panama, and Peru; and T. femorata Melo from Peru. McAtee & Malloch (1923) provided a key to the species known at the time separating T. inornata Stål into two subspecies, the nominate subspecies and T. inornata cubensis, from Cuba. Maldonado (1986) recorded T. inornata cubensis from Puerto Rico. More recently Melo (2008) described T. femorata and provided a key to the three species.

The relation of Sewage Disposal to the spread of Helminth Infections in British Guiana

1924 ◽  
Vol 2 (4) ◽  
pp. 175-190 ◽  
Author(s):  
M. Khalil
Keyword(s):  
Tropical Medicine ◽  
London School ◽  
Wide Spread ◽  
Sewage Disposal ◽  
British Guiana ◽  
Helminth Infections ◽  
Intestinal Infections ◽  
The World ◽  
The Tropics ◽  
Parasitic Worms

Intestinal infections with parasitic worms are wide-spread in the Tropics. It is estimated that half the population of the World is infected with hookworms. Infection is propagated by contamination of the soil with the bowel discharges which contain the eggs of these parasites and prevention depends upon the adoption of a system of sewage carriage which ensures the safe disposal of the distribution of these eggs. The various methods of sewage disposal now operating in British Guiana and elsewhere in the tropics are adaptations, with few or no alterations, of schemes originally introduced to meet conditions prevailing in temperate climates. Prior to the visit of the Filariasis Commission of the London School of Tropical Medicine to British Guiana in 1921 the fate of the eggs of the hookworm and of other parasites in the system has not been scientifically studied.

Making Biology Tropical

2017 ◽  
Author(s):  
Megan Raby
Keyword(s):  
The United States ◽  
Barro Colorado Island ◽  
Ecological Research ◽  
Spatial Practices ◽  
Economic Interests ◽  
British Guiana ◽  
Canal Zone ◽  
Tropical Biology ◽  
Panama Canal Zone ◽  
The Tropics

Early efforts to create institutions for ecological research in the tropics were far more difficult to sustain financially than stations with agricultural goals. In the 1910s and 1920s, rival zoologists Thomas Barbour and William Beebe each drew on their wealth, corporate and political connections, and larger­than­life personalities to transform the landscape of basic tropical research. While differing in their spatial practices and relative emphases on taxonomy or ecology, both men argued that the study of life in the tropics was fundamental to a broad understanding of biology. Barbour argued that “tropical biology” was essential to solving the United States’ growing practical problems in tropical agriculture and medicine. Chapter 2 examines the stations they developed—Beebe in British Guiana, Barbour at Soledad, Cuba, and Barro Colorado Island (BCI) in the Panama Canal Zone—and how they leveraged U.S. economic interests in the tropics to further basic science.

Stereological Analyses of Hepatocyte Ultrastructure Monitor Arsenic Liver Burdens

1980 ◽  
Vol 38 ◽  
pp. 442-443
Author(s):  
E. M. B. Sorensen ◽  
R. R. Mitchell ◽  
L. L. Graham
Keyword(s):  
Drainage System ◽  
Water Levels ◽  
Ultrastructural Changes ◽  
Hepatocyte Ultrastructure ◽  
Lepomis Cyanellus ◽  
Large Numbers ◽  
Activation Data ◽  
Water Analyses ◽  
Municipal Lake ◽  
Green Sunfish

Endemic freshwater teleosts were collected from a portion of the Navosota River drainage system which had been inadvertently contaminated with arsenic wastes from a firm manufacturing arsenical pesticides and herbicides. At the time of collection these fish were exposed to a concentration of 13.6 ppm arsenic in the water; levels ranged from 1.0 to 20.0 ppm during the four-month period prior. Scale annuli counts and prior water analyses indicated that these fish had been exposed for a lifetime. Neutron activation data showed that Lepomis cyanellus (green sunfish) had accumulated from 6.1 to 64.2 ppm arsenic in the liver, which is the major detoxification organ in arsenic poisoning. Examination of livers for ultrastructural changes revealed the presence of electron dense bodies and large numbers of autophagic vacuoles (AV) and necrotic bodies (NB) (1), as previously observed in this same species following laboratory exposures to sodium arsenate (2). In addition, abnormal lysosomes (AL), necrotic areas (NA), proliferated rough endoplasmic reticulum (RER), and fibrous bodies (FB) were observed. In order to assess whether the extent of these cellular changes was related to the concentration of arsenic in the liver, stereological measurements of the volume and surface densities of changes were compared with levels of arsenic in the livers of fish from both Municipal Lake and an area known to contain no detectable level of arsenic.

Pathology of Renal Diseases in the Tropics

2003 ◽  
Vol 23 (1) ◽  
pp. 88-106 ◽  
Author(s):  
Vijitr Boonpucknavig ◽  
Virawudh Soontornniyomkij
Keyword(s):  
Renal Diseases ◽  
The Tropics
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