Janků (1923) described in detail the autopsy results of an 11-month-old boy who had presented to hospital with hydrocephalus. The boy had classic marks of toxoplasmosis including chorioretinitis (inflammation of the choroid and retina of the eye). Histology revealed a number of "sporocytes", though Janků did not identify these as "T. gondii". It was not until 1937 that the first detailed scientific analysis of "T. gondii" took place using techniques previously developed for analyzing viruses. In 1937 Sabin and Olitsky analyzed "T. gondii" in laboratory monkeys and mice. Sabin and Olitsky showed that "T. gondii" was an obligate intracellular parasite and that mice fed "T. gondii"-contaminated tissue also contracted the infection. Thus Sabin and Olitsky demonstrated "T. gondii" as a pathogen transmissible between animals. "T. gondii" was first described as a human pathogen in 1939 at Babies Hospital in New York City. Wolf, Cowen and Paige identified "T. gondii" infection in an infant girl delivered full-term by Caesarean section. The infant developed seizures and had chorioretinitis in both eyes at three days. The infant then developed encephalomyelitis and died at one month of age. Wolf, Cowen and Paige isolated "T. gondii" from brain tissue lesions. Intracranial injection of brain and spinal cord samples into mice, rabbits and rats produced encephalitis in the animals. Wolf, Cowen and Page reviewed additional cases and concluded that "T. gondii" produced recognizable symptoms and could be transmitted from mother to child. The first adult case of toxoplasmosis was reported in 1940 with no neurological signs. Pinkerton and Weinman reported the presence of "Toxoplasma" in a 22-year-old man from Peru who died from a subsequent bacterial infection and fever. In 1948, a serological dye test was created by Sabin and Feldman based on the ability of the patient's antibodies to alter staining of "Toxoplasma". The Sabin Feldman Dye Test is now the gold standard for identifying "Toxoplasma" infection. Transmission of "Toxoplasma" by eating raw or undercooked meat was demonstrated by Desmonts et al. in 1965 Paris.