Some genes in the candidate early-branching eukaryote Giardia lamblia occur in separate pieces, transcribed from non-contiguous chromosomal locations. The pre-mRNAs from the separate pieces apparently find each other by regions of complementarity and are subsequently spliced together by the spliceosome. Could genes in pieces, transcribed into separate pre-mRNAs, have been an early feature of sp...

Short introns occur in numerous protist lineages, but there are no reports of intervening sequences in the protists Giardia lamblia and Trichomonas vaginalis, which may represent the deepest known branches in the eukaryotic line of descent. We have discovered a 35-bp spliceosomal intron in a gene encoding a putative [2Fe-2S] ferredoxin of G. lamblia. The Giardia intron contains a canonical spli...

Introduction: Giardia lamblia is a protozoan parasite with universal distribution in human populations. This infections transfer to human via contaminated foods and waters with Giardia cysts. The Knowledge on the incidence of this agent in the potential infection sources can provide valuable information for control and the spread of this parasite to human communities. This study was aimed to is...

Giardiasis is endemic in all regions of the world. Giardia lamblia (G. lamblia) cysts are spread in Egypt via the fecal-oral route, through ingestion of the cyst with contaminated food or water. The symptoms of giardiasis vary from the asymptomatic passage of cysts to chronic diarrhea, malabsorption and weight loss. Although microscopy has the advantage of low cost and ability to simultaneously...

Fecal samples were taken from wild ducks on the lower Rio Grande River around Las Cruces, N. Mex., from September 2000 to January 2001. Giardia cysts and Cryptosporidium oocysts were purified from 69 samples by sucrose enrichment followed by cesium chloride (CsCl) gradient centrifugation and were viewed via fluorescent-antibody (FA) staining. For some samples, recovered cysts and oocysts were f...

Background This study is the first phylogenetic genotype analysis of Giardia lamblia in Iran. The main objective was to determine genotyping and identify the sub-assemblages of Giardia lamblia isolates involved in the transmission of giardiasis in Fars Province, south of Iran, in 2012. Methods Forty G. lamblia isolates were collected from the patient's fecal samples with gastrointestinal disc...

background: helicobacter pylori is the most common cause of chronic infection in the human stomach. the infection has universe prevalence in all age groups. probably, this bacterium is the cause of most common chronic bacterial infection in human beings and infects approximately half of the world population. h. pylori produces urease, an enzyme that degrades the urea in the stomach’s mucous to ...