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10

Short answer There is no evidence whatsoever that the parasitic arthropod Cymothoa exigua develops itself into a functional tongue. Instead, it consumes the fish's tongue and occupies the freed buccal space to continue feeding onto the fish's blood or mucus. Background The linked wikipedia page that states that Cymothoa exigua arthropods form fully ...


9

No, Naegleria fowleri is a free-living excavate form of protist that lives in warm fresh water. Fowleri finds its way into the brain by eating through the olfactory neurons in the nose where it multiplies itself greatly by feeding on nerve tissue. Once it penetrates the nervous tissue, fowleri's feeding results in significant necrosis of and hemorrhaging ...


8

Plasmodium falciparum (the main causative agent of malaria) and other Plasmodium species have a very complex life cycle, with stages in the female host Anopheles mosquito, in the human liver, and in the human circulatory system, where it primarily resides in the erythrocytes (red blood cells, or RBCs): During a blood meal, a malaria-infected mosquito ...


6

Found it. It's a Sarcodes or snow plant: http://en.wikipedia.org/wiki/Sarcodes


5

In my own opinion, I would not classify this as parasitism, as more unpalatable species are eaten with Batesian mimicry (and eating causes death). Parasitic organisms often do not kill the host, whereas in this case, it does. However, you are correct in stating that a unpalatable species with aposematic coloring is detrimented by the presence of a palatable ...


3

Just to add to Christiaan's excellent answer: The authors of his cited study state: [the tongues] replacement by a parasite would not appear to be a complex phenomenon. Implying that this is a very basic process, according to what they observed. To answer your question as it was posed: Wikipedia states the tongue becomes fully functional. The ...


3

No. Although malaria is transmitted through the saliva of a female Anopheles mosquito, it stays in the bloodstream and doesn't pass over to the saliva of humans (otherwise it probably would be transmittable via humans directly). Once the parasites travel to the liver, it infects and bursts hepatocytes after reproducing (asexually). The burst cells then ...


3

Short answer: 50-60 µM O2 is ok; 80 µM is toxic. Giardia lamblia (aka intestinalis) is a microaerophilic intestinal parasite. According to: Lloyd et al. (2000) The microaerophilic flagellate Giardia intestinalis: oxygen and its reaction products collapse membrane potential and cause cytotoxicity. Microbiology 146: 3109 - 3118 Giardia ...


3

You could have asked a similar question about splicing. The function of RNA editing seems to be similar: it's one of the ways to trigger production of alternative transcripts and proteins given the same DNA sequence. The question is discussed, for example, in this review. The authors describe different known effects of alternative RNA editing: Amino-acid ...


2

In a 1987 article "Nonenteric Infections Acquired through Contact with Water", the author mentioned that "Infection of the ears, throat, respiratory tract, and cornea are also encountered" by virulent strains of Acanthamoeba and Naegleria fowleri. The only reference that implicates Naegleria fowleri is this one, but it doesn't mention modes of infection. ...


2

I think the wikipedia article defining parasitoids has it right on this one. The term is, and should be flexible and it's definition defined by context. i.e Case by case definitions are made obvious in the literature. Patently there is no point to trying to draw arbitrary lines of distinction between such vague, and often variable, life histories. In ...


1

According to wikipedia they locate "prey" by detecting CO2 and some other compounds, so I don't think mosquitoes will actually find the blood unless they're accidentally right on top of it. And for your reason: if you have the equipment to regularly draw some blood, keep it at 37 C and have some anticoagulants on hand, you might be better off using some ...



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