a person who receives support, advantage, or the like, from another or others without giving any useful or proper return, as one who lives on the hospitality of others: They are greedy politicians, parasites with their snouts in the public trough.
An organism that lives off or in another organism, obtaining nourishment and protection while offering no benefit in return. Human parasites are often harmful to the body and can cause diseases, such as trichinosis.
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A parasite is an organism that lives on or in a host organism and gets its food from or at the expense of its host. There are three main classes of parasites that can cause disease in humans: protozoa, helminths, and ectoparasites.
Although the term ectoparasites can broadly include blood-sucking arthropods such as mosquitoes (because they are dependent on a blood meal from a human host for their survival), this term is generally used more narrowly to refer to organisms such as ticks, fleas, lice, and mites that attach or burrow into the skin and remain there for relatively long periods of time (e.g., weeks to months). Arthropods are important in causing diseases in their own right, but are even more important as vectors, or transmitters, of many different pathogens that in turn cause tremendous morbidity and mortality from the diseases they cause.
The doctor will order tests, such as blood or fecal tests, that can diagnose the parasite and help them develop a specific treatment plan. Early treatment may help stop the infection from spreading to others.
Some mosquitoes carry this parasite, which causes malaria. The disease kills more people than any other of its kind. It feels like the flu, and it causes body chills, fever, and sometimes nausea or vomiting. A doctor has to look at someone's blood under a microscope to tell if they have it. Early treatment is best. Certain prescription drugs can cure most types.
This easy and fun to use app includes images and information on approximately 100 veterinary internal parasites found in dogs, cats, small mammals, reptiles, and birds. Learn how to download and use this app in your practice!
Watch this video to learn how to use CAPC's parasite ID app in your veterinary practice! This fun and easy to use app includes images and information on approximately 100 veterinary internal parasites found in dogs, cats, small mammals, reptiles, and birds. ...
Parasites & Vectors publishes articles on the biology of parasites, parasitic diseases, intermediate hosts, vectors and vector-borne pathogens. Manuscripts published in this journal will be available to all worldwide, with no barriers to access, immediately following acceptance. Read more
This collection is dedicated to articles reporting the use of AI in parasitology research. We particularly welcome articles dealing with parasitic disease diagnosis, parasite and vector identification as well as those reporting the prospection of drugs and vaccine candidates.
Primers provide short, authoritative and accessible accounts that explore the basic/applied biology of selected parasites, intermediate hosts, vectors and vector-borne pathogens. Primers integrate fundamental aspects of parasite or vector biology with recent, cutting-edge research findings and a discussion of future research needs. Each Primer also includes a downloadable/printable poster.
Dr. Friederike Ebner is Assistant Professor in Infection Pathogenesis at the Technical University Munich in Germany. She is steering committee member of the European Veterinary Immunology Group (EVIG). She acquired postdoctoral training in parasite immunology at the Institute for Immunology of the Department of Veterinary Medicine, Freie Universitt Berlin, Germany. As an immunologist she researches on the interactions between gastrointestinal helminths and the immune systems of animals and humans. There she aims to understand how immunity is generated and how parasites evade the immune response in order to derive intervention and vaccine strategies from this knowledge.
Dr. Pegine Walrad is an Associate Professor in the York Biomedical Research Institute at the Univ. of York specialising in parasite lifecycle trans-regulators that promote virulence. Previous work isolated and characterized protein domains and 10 novel interacting cofactors (e.g. Hairless) of Runt/Runx transcription factor in Drosophila, and the first trans-regulator of surface antigens and a novel pathway of mRNA export in Trypanosoma brucei parasites. Current research focuses on genetic regulators of Leishmania parasite differentiation to human-infectious forms.
Dr. Anna Bajer is Head of the Department of Eco-epidemiology of Parasitic Diseases at the University of Warsaw, Poland. Dr. Bajer and her lab focus on a range of eco-epidemiological studies on ticks and vector-borne diseases (babesiosis, borreliosis, bartonellosis, dirofilariasis); on factors influencing parasite communities in rodents, model free-living hosts (helminths and haemoparasite community); and on reservoir of intestinal microparasites (Cryptosporidium, Giardia). She has also worked on molecular diversity and molecular phylogeny of micro- and macroparasites of medical and veterinary significance.
Gastrointestinal (GI) parasitism is a common problem in cats, with prevalence rates as high as 45% in some populations. These parasites can be wormlike or one-celled protozoan organisms. They usually cause fairly nonspecific symptoms, such as a dull coat, coughing, vomiting, diarrhea, mucousy or bloody feces, loss of appetite, pale mucous membranes, or a potbellied appearance. The vomiting, diarrhea, anemia, and dehydration caused by intestinal parasites can weaken a cat, making it more susceptible to viral and bacterial infections and other diseases. Importantly, some GI parasites of cats have the potential to infect humans.
Roundworm infections are usually relatively benign, but affected kittens may show vomiting, diarrhea, constipation, or loss of appetite. If left untreated, roundworm infections may cause potentially life-threatening anemia (low red blood cell count) and, in extreme cases, stomach rupture, so infection should be taken seriously and treated aggressively. Infection is confirmed by the presence of parasite eggs during microscopic examination of the stool. Several medications treat roundworm infections effectively in cats, but owners can minimize the likelihood of infection by prohibiting hunting and reducing exposure to the feces of infected cats. Treating queens prior to breeding reduces the likelihood that the parasite will infect kittens. It is important to note that reinfection after successful treatment is relatively common.
Whipworms are an uncommon parasite of cats in the United States. Adult whipworms reside in the large intestine and usually do not cause serious disease, although heavy infestations may cause diarrhea.
Stomach Worms Ollanulus tricuspis and Physaloptera species are worms that inhabit the feline stomach. Ollanulus infections occur sporadically in the U. S. and are more common in free-roaming cats and those housed in multiple-cat facilities. Cats become infected by ingesting the parasite-laden vomit of another cat. Chronic vomiting and loss of appetite, along with weight loss and malnutrition may be seen, although some infected cats show no signs of disease. Diagnosis of Ollanulus infection can be difficult, and relies upon detecting parasite larvae in the vomit. Effective treatment is available, and avoiding exposure to cat vomit is the most effective way to control infection.
Physaloptera infections are even more rare than Ollanulus infections. Adult female worms attached to the stomach lining pass eggs that are eaten by an intermediate host, usually a cockroach or cricket. After developing within the intermediate host, the parasite causes infection when a cat ingests the insect or a transport host, such as a mouse, that has eaten an infected insect. Cats infected with Physaloptera may experience vomiting and loss of appetite. Diagnosis requires microscopic detection of parasite eggs in the stool, or seeing the parasite in the vomit. Effective treatment exists, and infection can be prevented by limiting exposure to intermediate and transport hosts.
Toxoplasma (For more detailed information on this parasite, see our Toxoplasmosis article) Cats are the definitive host for the Toxoplasma gondii organism. Infection with this one-celled parasite is fairly common, but rarely causes disease in cats. Cats become infected by eating any of the three infective stages of Toxoplasma; most commonly by eating tissue cysts in infected prey or in other raw meat. Toxoplasma multiplies in the small intestine and the oocysts are excreted in the feces after two to three weeks. These oocysts take approximately one to five days to become infective after being shed, highlighting the importance of daily cleaning of the litter box to control the spread of toxoplasmosis. Toxoplasmosis can be transmitted to humans, although most otherwise healthy people infected with this organism show few if any signs of disease. The exceptions to this are immunocompromised individuals and pregnant women, both of whom should be very careful to avoid exposure to infective Toxoplasma oocysts (see our article on Zoonotic Diseases).
The treatment of gastrointestinal parasites often requires medication prescribed by a veterinarian. Whenever using medications, be sure to follow the provided directions carefully. Parasite reinfections are very common, but can be prevented. Parasite control begins with good sanitation procedures. This includes daily removal of feces, washing the litter box with a disinfectant, such as diluted household bleach, on a regular basis, avoiding overcrowded conditions, avoiding diets with raw meats, and controlling intermediate hosts like fleas, ticks, and rodents. Good parasite control is the key to a healthier cat. be457b7860
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