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Questions tagged [parasitology]

The study of parasites, their hosts, and the relationship between them.

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30 views

What is the parasitic species shown in the figure? [closed]

Image of some parasite that resulted in infestation in India]
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0answers
7 views

How to isolate a high proportion of available helminth ova from animal faeces/feces without damaging them?

I need to isolate large numbers (tens to hundreds of thousands) of cat (and later dog) hookworm ova from cat/dog faeces. I have a centrifuge, and various sieves with pore sizes of 20, 63, 75, 106, ...
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0answers
21 views

What does it mean for Caenorhabditis species to be “pseudoparasitic”?

In this Wormbook chapter, Kiontke says that some Caenorhabditis species live "pseudoparasitically" on warm-blooded animals. What does it mean? What is a pseudoparasite? I understand a parasite to be ...
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116 views

Why some eggs are bile stained?

Why eggs of some helminths( Diphyllobothrium latum, Trichuris trichiura, Ascaris lumbricoides etc) are stained with bile while eggs of other helminths( Hymenolepis nana, Enterobius vermicularis etc.) ...
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1answer
63 views

Why do so many parasites infect definitive and intermediate hosts rather than just one host?

Many parasites infect multiple host species, with one host species being the definitive host (where the parasite reproduces), and the other host species being the intermediate host (where the parasite ...
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2answers
3k views

Are some people more 'attractive' to mosquitos? If so, is that a hereditary trait?

Mosquitos clearly love me-- but I have been told I am just more reactive to mosquito bites. Are some people more 'attractive' to mosquitos (get bit more)? Or is it just that they are more reactive? If ...
3
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1answer
163 views

can one be infected with Naegleria fowleri by taking Steam?

will Naegleria fowleri be present in the steam molecules. Many people take steam from hot water to get relief from sinus. I read somewhere that Naegleria fowleri gets killed over 70 C. So steam will ...
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0answers
90 views

Are there any plants that parasitize on animals?

It seems, fungi often infect animals, while plants it seems, never. Is it because the cellulose cell walls make them incompatible with animal tissue?
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0answers
56 views

Does high concentration of salt kill chitin protected parasitic eggs?

Parasitic eggs of some parasites protected by chitin that makes them highly survivable (even in acidic environment of stomach). What about high concentration of salt in water - does it kill chitin ...
2
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1answer
54 views

Can toilet or sewage aerosol transfer eggs of human parasites?

Flushing a toilet produces hundreds of thousands of tiny droplets containing viruses and bacteria (source): Up to 145,000 droplets were produced per flush, with the high-energy flushometer ...
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0answers
27 views

pcr troubleshoot for toxoplasma with GRA6

I did pcr for Toxoplasma genotyping with GRA6 gene. my primer sequences were forward 5-GTAGCGTGCTTGTTGGCGAC-3 reverse 5-TACAAGACATAGAGTGCCCC-3. PCR was done in a 25μl reaction mixture. I used 10pmol ...
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0answers
107 views

Found in blood sample - what is it? Hopefully not a nemotode-

After examining someone's blood - through microscope - I found these. There were some more that were not photographed. Could someone please inform me on what these are? Maybe abiotic material on the ...
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1answer
119 views

Why are there no endoparasitic mammals or reptiles or birds? [closed]

I am curious why there aren’t any endoparasitic mammals, reptiles or birds Endoparasite being a parasite that live In the host whereas ectoparasite lives On the host I hope this clears up confusion
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0answers
113 views

Are there any parasites that alter human behavior in a self destructive way?

There seems to be quite a few examples of parasites taking over the behavior of insects in a way that leads to the death of the host. A couple of examples include: Spinochordodes tellinii: A ...
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0answers
48 views

Exclusion Limit and permeability of outer membrane

According to this textbook: P aeruginosa, for example, which is extremely resistant to antibacterial agents, the outer membrane is 100 times less permeable than that of E coli.[pg.no 27] and then ...
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0answers
19 views

Could there be latent infections in the human population that we don't know of?

Herpes simplex 1 virus and toxoplasmosis are common infections that that many of use have (65% and 10% of americans, respectively). Both of these are chronic, latent infections that can occasionally ...
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0answers
46 views

Sub-saharan africans (Andamanese, Semang) have the ancestral hair-type, do they also have pediculus humanus capitis lice?

Do humans with the ancestral hair-type also have pediculus humanus capitis lice? Pubic hair lice, Pthirus pubis, are adapted morphologically to cling onto coarse body hair, and originates from ...
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1answer
35 views

Do Pthirus gorillae remain in gorilla leaf nests after gorillas migrate and abandon them?

Gorillas build leaf nests to sleep in. Do the lice which parasitise gorillas, Pthirus gorilla, remain in gorilla leaf nests after gorillas migrate to new regions (and abandon the old nests)?
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1answer
277 views

Why don't mosquitoes target the visible blood vessels under the skin?

We can see numerous veins under our skin. Why don't mosquitoes suck blood from those vessels? Why don't they use better option?
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34 views

Are parasites that wouldn't have infected an individual if it hadn't handicapped more likely to kill than others?

By the Immunocompetence Handicap Hypothesis (Karter & Folstad, 1992), individuals with good immunity invest in sexually selected characteristics and in doing so forego investing in immunity. The ...
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0answers
15 views

Mackerel evolutionary health affected by loss of predators?

I notice that Atlantic Mackerel (Scombrus scombrus) is endemically affected by parasites. In one study I read that the researchers found that over 70% of the mackerel sampled were infected with ...
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1answer
3k views

How does the immune system fight scabies mites?

After a distressing episode involving my elderly mother and a nursing home, I've been reading up on scabies. It seems that in healthy people, the immune system limits the mite population to around 10 ...
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1answer
64 views

Validation of houskeeping genes in a mixture of cDNAs of two species

I have a parasite sample (mixed with host blood) and I need to check gene expressions of parasite using relative quantification (RT_qPCR). For this, I need a good housekeeping gene. I chose 10 genes (...
2
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1answer
51 views

Save endangered parasitic species?

It seems to be an important issue the parasitic control and even some pursue the eradication of some species. Most of the researchers in parasitology are focused on the host damage and population ...
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1answer
92 views

How did parasitoid wasps evolve their life cycle?

I know there are a variety of wasps with various strategies for acquiring and controlling hosts. Do these form a rough picture of how these life cycles could have developed in the first place? What is ...
0
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1answer
27 views

RNA seq: Should non-infected units be used for RNA-seq?

I am designing a RNA-seq experiment to study transcriptomic profile changes upon parasite exposure. Some papers I read, mostly extract RNA from the entire treatment group (organisms exposed to ...
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1answer
466 views

Worm found inside of wahoo

A fisherman from Hawaii wrote the following: This Fat juicy worm lives inside of every Wahoo that I catch. Inside the stomach. Right at the junction to the intestines. Sometimes there are two. ...
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0answers
23 views

What is the estimated number of variant surface glycoproteins that trypansomes can express?

In "Vaccination against trypanosomiasis" by Greca and Magez they assert that there are "innumerable" variant surface glycoproteins that the parasite can express. What does innumerable mean here? These ...
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1answer
300 views

What is meant by bionomics of a vector?

What is supposed to fall under the title Bionomics (The study of an organism and its relation to its environment; ecology.)? Suppose we are dealing with a vector, Anopheles sp. are the following ...
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1answer
8k views

What is the difference between Reservoir and paratenic hosts?

Paratenic host 'In parasitology, the term paratenic describes a host that is not necessary for the development of a particular species of parasite, but nonetheless may happen to serve to maintain the ...
2
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1answer
49 views

Parthenogenesis Induction

I have read about Parthenogenesis induction in a paper : "Hagimori T, Abe Y, Date S, Miura K (2006) The first finding of a Rickettsia bacterium associated with parthenogenesis induction among insects. ...
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0answers
967 views

What decides the nocturnal periodicity of microfilariae?

Microfilariae, which are the larvae of filarial worms show a nocturnal periodicity of entering into blood in south Asia and China. This coincides with the biting habits of its vector. The same very ...
3
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1answer
136 views

Laurus Nobilis parasite identification

In north Italy were I live I have two plants of laurus at the two sides of a garden. One of them has some sort of parasite on its leaves. Someone know something about it? Leaves are covered with ...
5
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2answers
175 views

Can a zombie apocalypse really occur? [duplicate]

Now, before you flag this question as blatantly off-topic, I claim to have a scientific basis for this(!): not some drug or remote control, but parasitic infection. While reading about behavior ...
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1answer
87 views

Are there specific non-protein substances that pathogens release into their host?

Reading research articles, I have found out that proteins called effectors get released into the host cell when a pathogen attacks a host. My question is, whether pathogens also release non-protein ...
6
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2answers
247 views

How can a tongue-biting parasitic arthropod become a fully functional tongue?

From wikipedia: The parasite Cymothoa exigua [consumes a fish's tongue and] then replaces [it] by attaching its own body to the muscles of the tongue stub. The fish is able to use the parasite just ...
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1answer
2k views

What makes worms' eggs float or sink?

In parasitology, while examining the stool sample, one important thing you do is test whether the eggs float on water or sink. We never did that since our coursework limits itself to microscopic ...
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1answer
507 views

Why is the species-diversity of deadly parasites greatest in the tropics?

There are so many parasites living in tropical regions of Africa, South America, or Asia, but very few in Europe or North America. Is this due to climate, or are there other reasons? Many of the ...
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1answer
621 views

Blood clumping in mosquitos

Will a mosquito die due to blood clumping if it sucks blood from two people who have different blood groups? What will happen in its gut? Is there any mechanism to avoid clumping? Or do mosquitoes ...
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1answer
59 views

Does a specific blood group enhance the Plasmodium growth?

I am maintaining Plasmodium falciparum cultures for past 6 months. For the blood culture, usually we lab members take turns and donate blood for the culture. I observed that the parasite's normal ...
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1answer
5k views

Can a reservoir host act as a vector?

Is it possible to get an infection by contact with a reservoir host ? Can a reservoir host act as a vector ? What is the distinction between these two concepts (reservoir host vs vector) ?
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0answers
223 views

Why does histamine release in Type I hypersensitivity help in case of parasites?

The IgE system exists because the same events which lead to often-life threatening complications of allergy, in presence of parasites are helpful in their elimination. The tissue injury mediated ...
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1answer
434 views

Spread of malaria from an infected person

If a person is infected with malaria, how can that person be a part of spreading malaria? As in, if a female anopheles mosquito sucks blood out of that infected individual, how is it possible that ...
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1answer
117 views

Can Biting Insects Detect Specific Places On A Host Body?

I'm gonna make a presumptive statement: It -seems- as though I get bitten by mosquitos and other biting insects in -exactly- the same places over and over. I mean within a few mm. Is that true? If ...
14
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1answer
308 views

Two different Leucochloridium infected snails - different species?

In the last three days, I have found two snails infected by some species of Leucochloridium. I found them in my garden in the south-west of Sweden. Now I'm wondering if they are the same species or ...
2
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1answer
2k views

Can cooking oil kill fleas?

I cannot find a reliable way to kill fleas after removing them from my cats with a flea comb. Soap and water does not do the job and they climb back out of the drain. Will cooking oil suffocate ...
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1answer
1k views

How to prove that pork meat has parasites

I suspect that the pork sold at a certain shop is infected with the parasite pork tapeworm (Taenia solium). Is there a way I can prove this without special equipment? Would it work to leave the raw ...
4
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0answers
86 views

How to calculate the number of sterile insects that must be released in SIT?

The sterile insect technique (SIT) is used to control insect pests through overwhelming the population in sterile males. The increase in sterile males released into an environment causes the increase ...
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1answer
31 views

Are Sciomyzidae fit to combat snails?

I read that Sciomyzidae are also called snail-killing flies, which immediateley made me think: "I need those"! Questions: Are they really fit to control snail over-population in my garden? and if ...
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2answers
1k views

Does malaria have a reservoir host?

Can warm blooded vertebrates other than humans act as reservoir hosts for malaria parasites? I'm mainly interested in Plasmodium vivax and possible reservoir hosts in the wider area of Europe/ Eurasia....