These and other experiments, described by Dr Manson in the Practitioner for March 1900, confirming the laboratory evidence as they do, leave no doubt whatever of the correctness of the mosquito-parasitic theory of malaria.
See also "Die Streit urn die Mosquito-Ktiste," by J.
They belong to the group of Protozoa, and, as already explained, have a double cycle of existence: (I) a sexual cycle in the body of the mosquito, (2) an asexual cycle in the blood of human beings.
The Stegomyia mosquito is the agent of yellow fever inoculation.
The last-named region has to a great extent had a separate history; and it was only in 1894 that the Mosquito Reserve, a central enclave which includes more than half of the littoral and hinterland, was incorporated in the republic and renamed the department of Zelaya.
Some observers maintain that Anopheles does not "sing," like the common mosquito, and its bite is much less irritating.
Ziemann advocates the destruction of mosquito larvae by the growing of such plants.
It is one thing to protect individuals from mosquito bites, another to prevent the propagation of the parasite in a whole community.
An encouraging example is afforded by the remarkable fact that malaria, which was once rife in certain districts of England, has now died out, although the Anopheles maculipennis mosquito still exists there.
This, however, refers to the Providence Island off the Mosquito Coast; it was only in 1646 that Eleuthera was colonized, and in 1666 New Providence, by settlers from the Bermudas.
The discovery of the parasite of malaria by Laveran, and of the method by which it gains entrance to the human body, through the bite of a particular variety of mosquito, by Manson and Ross, promises much in the way of eradication of the disease in the future.
For some of these, as redwater (pyrosoma), antidotes are already found; for others, as for Texas fever - of which the parasite is unknown, but the mode of its transmission, by the mosquito, discovered (Finlay-Reed) - preventive measures are reducing the prevalence.
Mosquito, a gnat, diminutive of mosca, a fly), a term originally applied to many species of small blood FIG.
A.) Mosquito Coast And Reserve (MosQuIT1A or RESERvA Mosquita), a division of the republic of Nicaragua, officially styled the department of Zelaya.
The Mosquito Coast is so called from its principal inhabitants, the Misskito Indians, whose name was corrupted into Mosquito by European settlers and has been entirely superseded by that form except in the native dialects.
The first white settlement in the Mosquito country was made in 1630, when the agents of an English chartered company - of which the earl of Warwick was chairman and John Pym treasurer - occupied two small cays, and established friendly relations with the Indians.
From 1655 to 1850 Great Britain claimed a protectorate over the Mosquito Indians; but little success attended the various endeavours to plant colonies, and the protectorate was disputed by Spain, the Central American republics, and the United States.
In 1848, the seizure of Greytown (San Juan del Norte) by the Mosquito Indians, with British support, aroused great excitement in the United States, and even involved the risk of war.
See "A Bibliography of the Mosquito Coast of Nicaragua," by Courtney de Kalb, in Bulletin of the American Geog.
Since the beginning of the 10th century strenuous efforts have been made to improve the sanitary condition by a new system of drainage, a better water service, the filling up of marshes wherein the malarial mosquito breeds, and in other directions.
The gad-fly (abu), the housefly (hai), the mosquito (ka), the flea (nonzi) and occasionally the bedbug (called by the Japanese kara-mushi because it is believed to be imported from China), are all fully represented, and the dragon-fly (tombO) presents itself in immense numbers at certain seasons.
The Mosquito Indians come every summer to fish for turtle off the Atlantic coast.
A few bananas and (especially from Oahu) pineapples of fine quality are exported; since 1901 the canning of 3 The entomological department of the Hawaii Experiment Station undertakes " mosquito control," and in 1905-1906 imported top-minnows (Poeciliidae) to destroy mosquito larvae.
Butter cloth, mosquito netting, handkerchief, blanket, towelling, bagging.
Since 1847 they have worked on the Mosquito coast of Central America.
The summer is propagated by the mosquito (Anopheles claviger) marks a new epoch; the most diverse theories as to its origin had hitherto been propounded, but it is now possible to combat it on a definite plan, by draining the marshes, protecting the houses by fine mosquito-proof wire netting (for Anopheles is not active by day), improving the water supply, &c., while for those who have fever, quinine (now sold cheaply by the state) is a great specific. A great improvement is already apparent; and a law carried in 1903 for the Bonifica dell' Agro Romano compels the proprietors within a radius of some 6 m.
In 1900-1901 Major Walter Reed (1851-1902), a surgeon in the United States army, proved by experiments on voluntary human subjects that the infection was spread by the Stegomyia mosquito,' and the prevention of the disease was then undertaken by Major William C. Gorgas - all patients being screened and mosquitoes practically exterminated.'
In the course of the 17th century the port became the great 1 Dr Carlos Finlay of Havana, arguing from the coincidence between the climatic limitation of yellow fever and the geographical limitation of the mosquito, urged (1881 sqq.) that there was some relation between the disease and the insect.
The surface of the country is naturally divided into five clearly distinct zones: (I) the series of volcanic peaks which extend parallel to the Pacific at a little distance inland; (2) the plains and lakes of the great depression which lies to the east of these mountains and stretches from sea to sea, between the Bay of Fonseca and the mouths of the San Juan; (3) the main cordillera, which skirts the depression on the east, and trends north-west from Monkey Point or Punta Mico on the Caribbean Sea, until it is merged in the ramifications of the Hondurian and Salvadorian highlands; (4) the plateaus which slope gradually away from the main cordillera towards the Caribbean; (5) the east or Mosquito coast,with its low-lying hinterland.
It is likely that this region was once a single uniform tableland, sloping by degrees to the flat Mosquito Coast, in which direction its level still sinks.
In summer in the uplands and the north the mosquito is sufficiently common to cause some little annoyance.
Guanaja was discovered in 1502 by Columbus, but the islands were not colonized until the 17th century, when they were occupied by British logwood cutters from Belize, and pearlers from the Mosquito Coast.
The history of the Mosquito Reserve and of the relations between Nicaragua and Great Britain is told in full under Mosquito Coast.
This caused great dissatisfaction among the Indians, who shortly afterwards revolted; and on the 28th of January 1860 Great Britain and Nicaragua concluded the treaty of Managua, which transferred to Nicaragua the suzerainty over the entire Caribbean coast from Cape Gracias a Dios to Greytown, but granted autonomy to the Indians in the more limited Mosquito Reserve (the area described above).
Following up this line of investigation, Major Ronald Ross in 1895 found that if a mosquito sucked blood containing the parasites they soon began to throw out flagellae, which broke away and became free; and in 1897 he discovered peculiar pigmented cells, which afterwards turned out to be the parasites of aestivo-autumnal malaria in an early stage of development, within the stomachwall of mosquitoes which had been fed on malarial blood.
In 1898 it was conclusively shown in Italy that if a mosquito E of the Anopheles variety bites a person suffering from malaria, and is kept long enough for the parasite to develop in the salivary gland, and is then allowed to bite a healthy person, the latter will in due time develop malaria.
The converse proposition, that persons efficiently protected from mosquito bites escape malaria, has been made the subject of several remarkable experiments.
Immitis, which is spread by means of the mosquito Anopheles (Centrbl.