C********2
发帖数: 435 | 1 http://www.cdc.gov/parasites/cyclosporiasis/biology.html
When freshly passed in stools, the oocyst is not infective The number 1 (
thus, direct fecal-oral transmission cannot occur; this differentiates
Cyclospora from another important coccidian parasite, Cryptosporidium). In
the environment The number 2, sporulation occurs after days or weeks at
temperatures between 22°C to 32°C, resulting in division of the sporont
into two sporocysts, each containing two elongate sporozoites The number 3.
Fre... 阅读全帖 |
|
H********g
发帖数: 43926 | 2 Infection in humans and other warm-blooded animals can occur:
by consuming raw or undercooked meat containing T. gondii tissue cysts[27][
50][51][52][53] The most common threat to citizens in the United States is
from eating raw or undercooked pork. It is possible, though unlikely, to
ingest the parasite through other products:[54]
by ingesting water, soil, vegetables, or anything contaminated with oocysts
shed in the feces of an infected animal.[50] Cat fecal matter is
particularly dangerous: J... 阅读全帖 |
|
a*******0
发帖数: 40 | 3 疫苗是要去打的。但疫苗管杀弓形虫吗？ 本想满一岁后去做个ANNUAL CHECK，看来要
排除可能只能最近去一次了。。
正在GOOGLE中，看到一句“cats shed the oocysts for only a short period of
time (about 2-3 weeks) and often are not shedding the oocysts when they are
showing signs of disease.”
是不是说即使有个弓形虫，猫一生中也只是有那么2-3个星期排除出，其他时候就自己
在身体里养着了？ |
|
z*****e
发帖数: 14786 | 4 Cornell的vet网站上看到的，原文链接如下：
http://www.vet.cornell.edu/fhc/brochures/toxo.html
现摘抄几段个人认为重要的：
Toxoplasmosis is usually diagnosed based on the history, signs of illness,
and the results of supportive laboratory tests. Measurement of IgG and IgM
antibodies to Toxoplasma gondii in the blood can help diagnose toxoplasmosis
. The presence of significant IgG antibodies to T. gondii in a healthy cat
suggests that the cat has been previously infected and now is most likely
immune and not excreting oocysts.... 阅读全帖 |
|
H********g
发帖数: 43926 | 5 弓形虫属顶端复合物亚门(subphylum Apicomplexa)，孢子虫网(clss sporozoasida)，
真球虫目(order Eucoccidiorida)，细胞内寄生性原虫，其生活史中出现5种形态，即
滋养体(速殖子，tachyzoite);包囊(可长期存活于组织内)，呈圆形或椭圆形，直径10
～200μm，破裂后可释出缓殖子，(bradyzoite);裂殖体;配子体和囊合子(oocyst)，前
3期为无性生殖，后2期为有性生弓形虫生活史的完成需双宿主：在终宿主(猫与猫科动
物)体内，上述5种形成俱存;在中间宿主(包括禽类，哺乳类动物和人)体内则仅有无性
生殖而有无性生殖，无性生殖常可造成全身感染，有性生殖仅在终宿主肠粘膜上皮细胞
内发育造成局部感染，囊合子由猫粪排出，发育成熟后含二个孢子囊(sporocyst)，各
含4个子孢子(sporozoite)，在电镜下子孢子的结构与滋养体相似，囊合子被猫舔食后
，在其肠中囊内子孢子逸出，侵入回肠末端粘膜上皮细胞进行裂体增殖，细胞破裂后裂
殖子逸出，侵入附近的细胞，继续裂体增殖，部分则发育为雌雄配子体，进行配子增殖
，形成囊... 阅读全帖 |
|
i*****i
发帖数: 2734 | 6 several facts about 弓形虫
1. Up to one third of the world's human population is estimated to carry a
Toxoplasma infection, so this is not really a "cat thing".
2. Cats generally develop immunity to T gondii after the initial infection
and therefore shed oocysts only once in their lifetime. And cats excrete the
pathogen in their feces for a number of weeks after contracting the disease
, generally by eating an infected rodent. So even the cat test positive now,
it will not hurt your baby in the fut |
|
