瘧疾抗原檢測(cè)試紙/大板（出口專用）
廣州健侖生物科技有限公司
傳播
瘧疾大多通過雌性按蚊叮咬傳播。共有400多種按蚊，其中約有30種是較嚴(yán)重的瘧疾病媒。所有這些主要病媒物種均在黃昏至拂曉期間叮咬。傳播嚴(yán)重程度取決于寄生蟲、病媒、人類宿主和環(huán)境等有關(guān)因素。
按蚊在水中產(chǎn)卵，蚊卵孵化成幼蟲，zui終變?yōu)槌晌谩４莆眯枰獮楫a(chǎn)卵吸血。每種按蚊有其各自偏愛的繁殖地點(diǎn)，例如有些按蚊喜歡在熱帶國(guó)家雨季常見的小水洼和動(dòng)物踩踏后留下的泥潭等淡水蓄積處滋生。
在按蚊生命周期較長(zhǎng)（使寄生蟲有時(shí)間在按蚊體內(nèi)完成發(fā)育）和按蚊偏好叮咬人類而不是其它動(dòng)物的地方，傳播更為嚴(yán)重。例如，非洲病媒按蚊生命周期長(zhǎng)，且特別喜歡叮咬人類，這是造成近90%的瘧疾死亡病例集中在非洲的主要原因。
傳播還取決于可能影響蚊子數(shù)量和存活的氣候條件，例如降雨模式、溫度和濕度等。在許多地方，傳播是季節(jié)性的，在雨季中或雨季結(jié)束后不久，傳播達(dá)到。在人們對(duì)瘧疾沒有多少免疫力或毫無(wú)免疫力的地區(qū)，如果氣候以及其它環(huán)境突然變得利于傳播，可能會(huì)出現(xiàn)瘧疾流行疫情。另外，如果免疫力低下的人進(jìn)入瘧疾密集傳播地區(qū)（如尋找工作或避難等），也可能會(huì)出現(xiàn)疫情。
人類免疫力是另一重要因素，在存在中度或嚴(yán)重傳播條件的地區(qū)居住的成年人中尤甚。多年接觸會(huì)形成一定的免疫力，雖然這并不能*防護(hù)，但它確實(shí)會(huì)降低感染瘧疾后出現(xiàn)重癥的風(fēng)險(xiǎn)。所以，非洲多數(shù)死亡病例發(fā)生在幼童中，而在傳播較少、免疫力低的地區(qū)，所有年齡組均面臨風(fēng)險(xiǎn)。
瘧疾抗原檢測(cè)試紙/大板（出口專用）
spread
Most of the malaria is spread by female Anopheles. There are more than 400 kinds of Anopheles, of which about 30 are more serious malaria vector. All of these major vector species were bitten during the evening to dawn. The severity of the transmission depends on factors such as parasites, vectors, human hosts and the environment.
Anopheles lay eggs in water, mosquito eggs hatch into larvae, and eventually become mosquitoes. Female mosquitoes need blood for oviposition. Each Anopheles has their own favorite breeding sites, such as some Anopheles mosquitoes like in the tropical rainy season common small puddles and animals trampled behind the quagmire and other fresh water accumulation.
In the anopheles longer life cycle (so that parasites have time to complete development in the anopheles) and anopheles prefer bites human beings rather than other animals where the spread is more serious. For example, the African disease Anopheles has a long life cycle and is particularly fond of biting humans, which is the main cause of nearly 90% of global malaria deaths concentrated in Africa.
The transmission also depends on climate conditions that may affect the number and survival of mosquitoes, such as rainfall patterns, temperature and humidity. In many places, the spread is seasonal, and in the rainy season or shortly after the rainy season, the spread reaches its peak. In areas where there is little immunity or no immunity to malaria, malaria epidemics may occur if the climate and other environments suddenly become conducive to transmission. In addition, if the low immunity of people into the malaria-intensive areas (such as looking for work or refuge, etc.), may also be an outbreak.
Human immunity is another important factor, especially among adults who live in areas with moderate or severe transmission conditions. Years of contact will form a certain degree of immunity, although this can not be compley protected, but it does reduce the risk of severe malaria after infection. As a result, most of the deaths in Africa occur in young children, and in all areas where transmission is low and low immunity, all age groups are at risk.
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【公司名稱】 廣州健侖生物科技有限公司
【市場(chǎng)部】 歐先生 1-8-9-2-5-0-5-2-6-8-1
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