Ograniczanie wyników

Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 32

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych:  Culicidae
help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
Twenty two species of Culicidae (47% of Polish fauna) were recorded in the vicinity of Wyskok in Polish Masurian Lakelands. Eight species of mosquitoes were recorded for the first time in the Masuria. Another 8 species are rarely recorded in Poland. Females of Coquillettidia richiardii (FICALBI), Aedes cinereus MEIGEN and Ochlerotatus cantans (MEIGEN) were the most aggressive in relation to a man.
12
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Anopheline mosquitoes and the malaria scourge

72%
The high prevalence of malaria in Africa has defiled many strategies aimed at its eradication. Researchers from various fields have tried without success in this fight against mosquito and its malaria disease. Annually billions of dollars are spent in the design of programs which are aimed at combating this dreaded disease. However all this spending seems to go down the drain as malaria and its vector mosquitoes celebrate their unflinching victory. Current control measures focusing on ways of preventing the disease vis- a -vis, protect man from the vectors “anopheline mosquito” are the mainstay of malaria prevention and control. Many of these control measures are operational with each contributing in its little way. The use of Long Lasting Insecticide Treated Nets (LLITN) and Indoor Residual Sprays (IRS) are well established strategies with global recognition and currently ongoing in Africa. However, as a result of shortcomings in these major control measures, new strategies with hopes of blissful success are been sought after. Larviciding (abortion of metamorphosis) and constant and adequate environmental sanitation seems to be the next option available for use. This article therefore takes a look at the vector- anopheline mosquito, its ecology, productivity and distribution. It also considers malaria and the various control and preventive measures currently targeted at its eradication.
Species composition Anophelini were investigated in the years 1986/87 and Culicini in 1987/88 at the part of the coastal region. The mosquitoes were caught from April till October, every week, at 47 stations (water reservoires, free nature and cattle-sheds). Total 16194 mosquitoes (2452 Anophelini and 13742 Culicini) were caught. They belong to 26 species of 5 genera: Anopheles (4 spp.), Aedes (15 spp.), Coquillettidia (1 sp.), Culex (1 sp.) and Culiseta (5 spp.). The highest numbers of Anophelini were observed in July (1986) and in September (1987). The agressiveness toward man showed by Culicini was found to be highest in the second half of May and at the end of July.
Twelve of the 47 Polish mosquito species can pose serious health problems to man or at least heavy nuisance. They fly from breeding sites (where huge numbers can be produced) into houses and/or farm buildings transmitting severe human and animal diseases. Problematic ones are: Anopheles messae and An. atroparvus, Ochlerotatus communis, Oc. cataphylla, Oc. punctor, Oc. cantans, Oc. sticticus, Aedes cinereus, Ae. vexans, Coquillettidia richiardii, Culex pipiens and Culiseta annulata. The problems of distribution, phenology under different climatic conditions, habitat requirements and preferences both of larvae and adults, behaviour, fertility and vector competence of all these species are analyzed. Most of the species in the Temperate Zone produce more than one generation during the growing season or at least have several emergences. Only Oc. communis and Oc. cataphylla are early spring univoltine species, although they can breed twice or more during the growing season when there are favourable conditions. Univoltine Oc. cantans, which can develop several times during a season, occurring in the breeding sites often together with multivoltine Oc. punctor. The period of their occurrence is usually much longer than that of Oc. communis and Oc. cataphylla. Flood–water mosquitoes – Oc. sticticus and both Aedes species occur along river valleys and their larvae can breed in different pools situated in a variety of environments. Culex pipiens, especially its form molestus and Culiseta annulata can breed in natural and artificial ponds, even in heavily polluted water. Although mosquitoes are known to be competent vectors of serious human and animal diseases, in Poland they are considered to cause nuisance only. Despite the fact that malaria was eradicated in Poland in 1960-s, at least two Polish anopheline species can still transmit the human malarial parasite very effectively. The remaining species (except for only one) described in the paper can transmit several arboviruses, while several species are vectors of filariosis (Dirofilaria sp.).
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.