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Toxoplasmosis is a parasitic disease caused by Toxoplasma gondii, an apicomplexan. [3] Infections with toxoplasmosis are associated with a variety of neuropsychiatric and behavioral conditions. [8] Occasionally, people may have a few weeks or months of mild, flu-like illness such as muscle aches and tender lymph nodes. [1]
Dividing T. gondii parasites. Toxoplasma gondii (/ ˈ t ɒ k s ə ˌ p l æ z m ə ˈ ɡ ɒ n d i. aɪ,-iː /) is a species of parasitic alveolate that causes toxoplasmosis. [3] Found worldwide, T. gondii is capable of infecting virtually all warm-blooded animals, [4]: 1 but felids are the only known definitive hosts in which the parasite may undergo sexual reproduction.
TORCH syndrome is a cluster of symptoms caused by congenital infection with toxoplasmosis, rubella, cytomegalovirus, herpes simplex, and other organisms including syphilis, parvovirus, and Varicella zoster. [1] Zika virus is considered the most recent member of TORCH infections. [2]
Congenital toxoplasmosis may lead to hydrocephalus, seizures, lymphadenopathy, hepatosplenomegaly, rash, and fever. However, retinochoroiditis is the most common manifestation, occurring in 3/4 of cases. In congenital toxoplasmosis, the disease is bilateral in 65–85% of cases and involves the macula in 58%.
A Sabin–Feldman dye test is a serologic test to diagnose for toxoplasmosis. Patient serum is treated with Toxoplasma trophozoites and complement, and then incubated. Patient serum is treated with Toxoplasma trophozoites and complement, and then incubated.
Microsporidia is a group of fungi that infect species across the animal kingdom, one species of which can cause microsporidiosis in immunocompromised human hosts. [ 30 ] Pneumocystis jirovecii (formerly known as Pneumocystis carinii ) is a fungus that causes pneumocystis pneumonia , a respiratory infection.
One well-known exception is toxoplasmosis caused by Toxoplasma gondii. [1] [2] Humans may first encounter coccidia when they acquire a dog, cat or bird that is infected. Other than T. gondii, the infectious organisms are canine and feline-specific and are not contagious to humans, unlike the zoonotic diseases. [citation needed]
The parasitic wasp larvae Reclinervellus nielseni attach to the spider Cyclosa argenteoalba, releasing substances that modify the spider's web-building behavior so that it weaves a cocoon-like structure for the larvae to pupate in. This manipulated behavior was longer lasting and more prominent the longer the larvae were attached to the spider ...