background: protozoa are common in poultry and otherbirds and can cause mild to severe disease. objectives: thisstudy was concerned with the prevalence of parasitic protozoa inwild waterfowl in caspian sea lagoons in the north of iran.methods:atotal of 293 waterfowl belonging to various generaincluding tadorna tadorna (common shelduck),aythya fuligula(tufted duck), aythya ferina (common puchard...

background: cats and other felines act as definitive hosts for many intestinal parasites, some of which are responsible for several zoonotic diseases.  the aim of this study was to determine the type and prevalence of protozoa and gastrointestinal helminthes among stray cats. methods: a cross sectional study was conducted. digestive tracts of 100 stray cats in zanjan province, north-west of ira...

Protistan assemblages of aquatic ecosystems are the focus of extensive research in aquatic ecology. One stimulus for this work has been the long-standing recognition that phototrophic protists (the unicellular algae) constitute a major fraction of the primary productivity within aquatic ecosystems. Another incentive has been the realization that protozoa (heterotrophic protists) play a pivotal ...

The results of a 6yr research programme designed to investigate the effects of removing protozoa from the rumen of sheep and cattle are discussed in relation to recently published results of similar studies conducted in other laboratories. Evidence is presented which suggests that the removal of protozoa from the rumen is associated with an increase in the availability of protein for digestion ...

The kinetoplastid protozoa infect hosts ranging from invertebrates to plants and mammals, causing diseases of medical and economic importance. They are the earliest-branching organisms in eucaryotic evolution to have either mitochondria or peroxisome-like microbodies. Investigation of their protein trafficking enables us to identify characteristics that have been conserved throughout eucaryotic...

Pathogens that are able to enter and multiply within human cells are responsible for multiple diseases and millions of deaths worldwide. Thus, the challenge is to elucidate these pathogen-specific and cell biological mechanisms involved in intracellular growth and spread. Bacteria from the genus Legionella belong to this group of pathogens. They are environmental bacteria and ubiquitous in natu...

We have identified telomerase activity in extracts of three evolutionarily diverse kinetoplastid species: Trypanosoma brucei, Leishmania major, and Leishmania tarentolae. Telomerase activity was initially detected in extracts from insect form cells of all three kinetoplastid species by using a modification of the one-tube telomere repeat amplification protocol [Kim, N., et al. (1994) Science 26...

Three growth studies were conducted with lambs, mature wethers and young cattle to examine the effects of defaunation on production. The animals were fed a' high energy-low protein diet su.pplemented with several levels of protein. These diets supported relatively high populations of protozoa in the rumen. A single dose of nonyl phenol ethoxylate (trade name Teric GN9) was used to remove protoz...

A procedure for the semi-automatic identification of the main protozoa and metazoa species present in the activated sludge of wastewater treatment plants was developed. This procedure was based on both image processing and multivariable statistical methodologies, leading to the use of the image analysis morphological descriptors by discriminant analysis and neural network techniques. The image ...