vampirolepis nana is the most common cestode in humans especially children. domestic mice and rats can serve as definitive hosts for v. nana. confusion exists over the species status and host-specificity of this tapeworm. in a previous study done by the same authors it was found that the egyptian human isolates of v. nana could be used to infect mice for experimental work. eggs in human feces a...

Worm burdens recovered from inbred mice strains, namely C57Bl/6, C57Bl/10, CBA, BALB/c, DBA/2 and C3H/He, conventionally maintained in two institutional animal houses in the State of Rio de Janeiro, RJ, Brazil, were analyzed and compared, regarding their prevalences and mean intensities. Three parasite species were observed: the nematodes Aspiculuris tetraptera, Syphacia obvelata and the cestod...

AIM To investigate the bactericidal effects of calcium chelated N-acetylneuraminic acid-glycomacropeptide (CaG-NANA) against Helicobacter pylori (H. pylori). METHODS For manufacture of CaG-NANA, calcium (Ca) was combined with glycomacropeptide (GMP) by chelating, and N-acetylneuraminic acid (NANA) was produced with Ca-GMP substrate by an enzymatic method. The final concentration of each compo...

An enzyme-linked immunosorbent assay (ELISA) was developed to measure serum immunoglobulin G antibodies in 65 patients infected with Hymenolepis nana and 30 noninfected patients. Antibody was detected in 51 of 65 (sensitivity, 79%) and 5 of 30 H. nana-negative patients (specificity, 83%). Nine patients infected with H. nana were treated with praziquantel (20 to 25 mg/kg of body weight). Antibod...

Neuraminidase A (NanA) is an important virulence factor that is anchored to the pneumococcal cell wall and cleaves sialic acid on host substrates. We noted that a secreted allele of NanA was over-represented in invasive pneumococcal isolates and promoted the development of meningitis when swapped into the genome of non-meningitis isolates replacing cell wall-anchored NanA. Both forms of recombi...

The degradation rates of N-acetylneuraminic acid (NANA) were investigated in plasma membranes and in the total protein of rat liver and Morris hepatoma 7777. The plasma membranes of Morris hepatoma 7777 could not be isolated by known methods useful for isolation of rat liver plasma membranes. Therefore, a modified method was developed. The specific activity of 5'-nucleotidase as a plasma membra...

BACKGROUND Amphimerus spp. is a liver fluke that infects humans and domestic animals. It is highly prevalent in some Ecuadorian communities. Currently, diagnosis is based on the microscopic observation of eggs in faeces, but this has variable sensitivity. More sensitive methods are needed for diagnostic testing. OBJECTIVE The main objective of this work was to develop an enzyme-linked immunos...

In the current study, Mitochondrial Cytochrome c oxidase gene especially codons within subunit 1 (cox1) of H. diminuta and H. nana Egyptian isolates from two stages (adult worms and eggs) and hosts origin (human and rat) were amplified, sequenced and aligned. PCR products were approximately 700 bp, 702 bp and 715 bp of H. nana rat isolates, H. diminuta rat isolates, and H. nana human isolates, ...