The preferred temperature (PT) of Poecilia sphenops (Pisces, Poeciliidae) (n = 240, 1.13 +/- 0.06 g wet weight, 3.26 +/- 0.88 cm standard length) from Presa Piedra Azul, Oaxaca, Mexico, was measured at acclimation temperature of 20 degreesC, 23 degreesC,…

Seroepidemiological studies have demonstrated that the presence of the tapeworm carrier in the household or in the close environment is the main risk factor associated to human and swine cysticercosis. Intervention measures evaluated are: 1) Mass treatment against the adult…

Research on cysticercosis has gained much interest in many countries, epidemiology, especially, has been thoroughly studied in Latin American. The review of the information gathered from these studies allows suggesting that the knowledge of the epidemiology of cysticercosis may be…

Human neurocysticercosis is a disease caused by the ingestion of Taenia solium eggs, which are released in faeces within the final segments or proglottids of the parasite. Since sewage has been used to irrigate vegetables, it was considered for a…

While biologists have been aware of the existence of native Mexican trouts for over a century, they have received little study. The few early studies that did muchmore than mention their existence began in the 1930s and continued into the…

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