Studies on host-pathogen interactions have led to the discovery of various cell surface associated and secretory molecules. Mucins and mucin-like molecules have recently been described in several protozoan parasites, at different stages of the life cycle. These share many structural and compositional features with mammalian mucins, but vary in several other aspects. It is now becoming evident t...

Protozoan parasites were the most frequently identified etiologic agents in waterborne disease outbreak from 1991 to 1994. The waterborne parasites Giardia lamblia, Naegleria fowleri, Acanthamoeba spp., Entamoeba histolytica, Cryptosporidium parvum, Cyclospora cayetanesis, Isospora belli, and the microsporidia are reviewed. For each parasite, the review includes history, life cycle, incidence, ...

1 Instituto de Biof́ısica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, 21941-902 Rio de Janeiro, RJ, Brazil 2Departamento de Biologia Celular Molecular e Bioagentes Patogenicos, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, 14049-900 Ribeirão Preto, SP, Brazil 3 Laboratorio de Bioquı́mica y Bioloǵıa Molecular, Facultad de Medicina, Universidad Católica de Cór...

The nucleus is arguably the defining characteristic of eukaryotes, distinguishing their cell organisation from both bacteria and archaea. Though the evolutionary history of the nucleus remains the subject of debate, its emergence differs from several other eukaryotic organelles in that it appears not to have evolved through symbiosis, but by cell membrane elaboration from an archaeal ancestor. ...

BACKGROUND Intestinal protozoan diseases in Yemen are a significant health problem with prevalence ranging from 18% to 27%. The present study is a cross-sectional study aimed at determining the factors associated with the high prevalence of intestinal protozoan infections among patients seeking health care in Sana'a City, the capital of Yemen. METHODOLOGY/PRINCIPAL FINDINGS Stool samples were...

Nucleotide sequences flanking the translational initiation site were compiled from protozoan nuclear genes and were compared in every protozoan group. The entire 5'-untranslated sequences were very rich in A- and T-residues, but poor in G- and C-residues in most protozoan genes except for the flagellated ones. The sequence AAAAATTTTTAAAATTTAAAATGANAT emerged as a consensus sequence flanking the...

To analyze the structural characteristics of zooplankton functional groups (ZFGs) and their correlation with environmental physicochemical factors in Chaohu Lake Basin, water samples were collected from October 2019 to July 2020, species ZFGs investigated. A total 250 species, including 88 protozoa, 115 rotifers, 28 cladocerans, 19 copepod detected divided into 16 ZFGs. The exhibited obvious sp...