A new species of Losdolobus, L. nelsoni sp. nov., is described based on females and males collected from grasslands in the mountains of southern Buenos Aires province, Argentina. Additionally, the phenology of this new species is presented and some aspects of the biogeography and distribution of the genus are discussed.

Trichinellosis is a widespread parasitic disease caused by different genotypes of Trichinella. It is common in animals and can spread from its reservoir in wild animals to synanthropic animals, domestic animals and people. Different transmission patterns have been documented (Campbell 1988). They range from those in which humans do not play any role to those in which improper human behaviour is...

Cell-mediated immunity during the muscular phase of Trichinella infection in humans was studied. Cell proliferation, the phenotypic changes in the T-cell population, and expression and production of cytokines were examined by using peripheral blood mononuclear cells (PBMC) collected at different times postinfection from 10 individuals who had acquired Trichinella spiralis and five individuals w...

This is the first report of an epidemic of human infection with Trichinella pseudospiralis. An outbreak of trichinellosis affecting 59 individuals, of whom one died, occurred in southern Thailand during 1994-1995. The source of this epidemic was raw pork from a wild pig that was distributed to villagers by a local hunter. The most striking clinical features among 50 individuals who could be fol...

In order to identify Trichinella at the species level, the commonly used test is a multiplex PCR, allowing the discrimination of nine out of the twelve taxa described so far. This test is based on five primer pairs amplifying fragments of the large subunit rDNA. Each taxon produces one or two bands of different sizes, resulting in a specific band pattern. By multiplex PCR, Trichinella murrelli ...

DNA analysis is playing an increasingly important role in characterising and classifying nematode parasites. Though less emphasis has been placed on utilising DNA elements to study nematodes of veterinary importance, correct diagnosis is, nevertheless, critical to proper treatment and control. The genus Trichinella presents a particularly interesting problem since the level of classification wi...

Variation in mating preferences coupled with selective predation may allow for the maintenance of alternative mating strategies. Males of the South American live-bearing fish Poecilia parae fall in one of five discrete morphs: red, yellow, blue, stripe-coloured tail (parae) and female mimic (immaculata). Field surveys indicate that the red and yellow morphs are the rarest and that their rarity ...

There are no published reports of domestic or sylvatic trichinellosis in Texas. The aim of the present survey was to determine the presence of Trichinella species in selected representative species of potential wildlife reservoirs in southern Texas. In 1998-99, tongues of 211 wild mammals were collected in southern Texas: 154 coyotes (Canis latrans), three bobcats (Lynx rufus), 32 racoons (Proc...