https://web.iitd.ac.in/~arunku/files/CEL795_2011/Microbial%20contamination%20of%20drinking%20water%20and%20disease%20outcomes%20in%20developing%20regions_Ashbolt.pdf

Microbial contamination of drinking water and disease outcomes in developing regions.

Rotavirus gene structure and function.

An unpassaged, safety-tested strain (CJN) of human rotavirus from a stool specimen of a hospitalized child was administered orally to 62 adult volunteers for determination of the dose required to produce infection with or without illness. Subjects ingested doses ranging from 9 X 10(-3) to 9 X 10(4) focus-forming units in buffered salt solution after consumption of 50 ml of 4% NaHCO3. The amount of virus in the inoculum required to cause infection (shedding of virus, seroconversion, or both) in study subjects was comparable to the minimum detectable in cultures of primary monkey kidney cells. Seventeen of 30 infected subjects became ill with doses equivalent to that required for infection. Although the preinoculation titers of serum neutralizing antibody to the challenge virus in study subjects ranged from less than 1:2 to 1:1,600, the concentration of serum antibody could not be correlated with protection from infection or illness in subjects given an infectious dose of virus.

Human Rotavirus Studies in Volunteers: Determination of Infectious Dose and Serological Response to Infection

Compelling experimental evidence suggests that microglial activation is involved in the spread of tau tangles over the neocortex in Alzheimer’s disease (AD). We tested the hypothesis that the spatial propagation of microglial activation and tau accumulation colocalize in a Braak-like pattern in the living human brain. We studied 130 individuals across the aging and AD clinical spectrum with positron emission tomography brain imaging for microglial activation ([11C]PBR28), amyloid-β (Aβ) ([18F]AZD4694) and tau ([18F]MK-6240) pathologies. We further assessed microglial triggering receptor expressed on myeloid cells 2 (TREM2) cerebrospinal fluid (CSF) concentrations and brain gene expression patterns. We found that [11C]PBR28 correlated with CSF soluble TREM2 and showed regional distribution resembling TREM2 gene expression. Network analysis revealed that microglial activation and tau correlated hierarchically with each other following Braak-like stages. Regression analysis revealed that the longitudinal tau propagation pathways depended on the baseline microglia network rather than the tau network circuits. The co-occurrence of Aβ, tau and microglia abnormalities was the strongest predictor of cognitive impairment in our study population. Our findings support a model where an interaction between Aβ and activated microglia sets the pace for tau spread across Braak stages. Microglial activation and tau accumulation propagate together in patients with Alzheimer’s disease, suggesting an interaction that determines disease progression.

Microglial activation and tau propagate jointly across Braak stages

Four serotypes of human rotaviruses that can be differentiated by neutralization tests have been described so far. We prepared serotype 1-, 2-, 3-, and 4-specific, neutralizing monoclonal antibodies to human rotaviruses. All were directed to VP7, a glycoprotein that carries a major serotype specificity. An enzyme-linked immunosorbent assay using these monoclonal antibodies has been developed for serotyping human rotavirus isolates. The sensitivity and specificity of this method were verified by using various strains of human rotavirus that were adapted to cell culture. Furthermore, it was shown that the method was applicable to serotyping human rotaviruses directly in stool specimens.

Direct serotyping of human rotavirus in stools by an enzyme-linked immunosorbent assay using serotype 1-, 2-, 3-, and 4-specific monoclonal antibodies to VP7.

Waterborne outbreak of rotavirus diarrhoea in adults in china caused by a novel rotavirus

Rotavirus-like agent in adult non-bacterial diarrhoea in China.

Seroepidemiology of adult rotavirus.

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Waterborne outbreak of rotavirus diarrhoea in adults in china caused by a novel rotavirus

Rotavirus-like agent in adult non-bacterial diarrhoea in China.

Seroepidemiology of adult rotavirus.