Background:
 Toxoplasma gondii is a single-celled obligate intracellular parasite commonly found in cat feces and animal issues known to cause cerebral infections immune- compromised individuals neonates. Once ingested, T. reaches the host's blood supply brain, where infection ensues. However, it remains unclear how crosses blood-brain barrier reach brain. In this study, we utilize ...

Here, we studied the potential of Neospora caninum tachyzoites to infect heifers when administered in utero by artificial insemination via contaminated semen. Eighteen primiparous cyclic heifers were hormonally synchronized and artificially inseminated. Nine of them, which were inseminated with semen containing 10(7) live N. caninum NC-1 isolate-tachyzoites, reacted with seroconversion and a sp...

The gene of GRA6 of Toxoplasma gondii pig strain was cloned; and the value of recombinant GRA6 as a diagnostic antigen of toxoplasmosis in China was investigated. A pair of primers was synthesized according to the DNA sequence of GRA6 of T. gondii RH strain, and the DNA of pig strain tachyzoites was prepared. A single, specific DNA fragment was successfully amplified from the genomic DNA of tac...

T n t O s p p o f oxoplasma gondii is a coccidian that is one of the most prevalent parasites infecting warm-blooded vertebrates round the world.1-3 Only cats complete the sexual phase in he gastrointestinal tract and pass environmentally resistant ocysts in feces. Sporozoites develop in oocysts after 1 to 5 ays of exposure to oxygen and appropriate environmental emperature and humidity (Fig 1)...

A gene encoding Babesia gibsoni thrombospondin-related adhesive protein (BgTRAP), known as a vaccine candidate, was stably expressed in Toxoplasma gondii (Tg/BgTRAP). The molecular weight and the antigenic reaction of recombinant BgTRAP expressed by the Tg/BgTRAP were similar to the original ones expressed by B. gibsoni. To evaluate the antigenicity of the recombinant BgTRAP expressed by T. gon...

Toxoplasma gondii is an obligate intracellular protozoan parasite found worldwide that is able to chronically infect almost all vertebrate species, especially birds and mammalians. Chitinases are essential to various biological processes, and some pathogens rely on chitinases for successful parasitization. Here, we purified and characterized a chitinase from T. gondii. The enzyme, provisionally...

Toxoplasma gondii can infect all species of warm-blooded animals, including humans, and causes serious diseases in immunocompromized hosts. Live tachyzoites derived from serial passage in HeLa culture were used in the Sabin-Feldman dye test for detection of Toxoplasma gondii antibody in serum samples of 21 captive wild felids including one fishing cat (Prion nailurus viverrina), one leopard (Pa...

Immunization with DNA can induce humoral and cell-mediated immune responses, both of which are important in conferring immunity to Toxoplasma gondii. The efficacy of genetic vaccination with a cDNA encoding the T. gondii SAG1 (P30) surface antigen was evaluated. Sera of immunized mice showed recognition of T. gondii tachyzoites by immunofluorescence and exhibited high titers of antibody to SAG1...