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The package insert for the ridt test used should be reviewed to ensure that an appropriate specimen is collected, and test procedures are followed. Some tests may require specimen collection using a special swab (some ridts must be used with a swab supplied with the test kit; some swab material can interfere with ridt results). Ridts must also ensure that the appropriate viral transport media or other media is used, consistent with test specifications, if testing is done at a different location from where the specimen is collected from the patient. Collection of good quality respiratory specimens (e.g., nasopharyngeal or nasal swab/aspirate/wash or combined nasal/throat swab specimens) also will increase the accuracy of ridt results. Some ridts require that the entire collected specimen be used in the test. Consider whether a second specimen should be collected for confirmatory testing using viral culture and/or rt-pcr. Accuracy of the test compared to a reference test (gold standard rt-pcr or viral culture).

Ridts can be useful to identify influenza virus infection as a cause of respiratory outbreaks in any setting, but especially in institutions (i.e., nursing homes, chronic care facilities, and hospitals cruise ships, summer camps, schools, etc. Positive ridt results from one or more ill persons with suspected influenza can support decisions to promptly implement infection prevention and control measures for influenza outbreaks. However, negative ridt results do not exclude influenza virus infection as a cause of a respiratory outbreak because of the limited sensitivity of these tests. Testing respiratory specimens from several persons with suspected influenza will increase the likelihood of detecting influenza virus infection if influenza virus is the cause of the outbreak, and use of molecular assays such as rt-pcr is recommended if the cause of the outbreak is not. Public health authorities should be notified promptly of any suspected institutional outbreak and respiratory specimens should be collected from ill persons (whether positive or negative by ridt) and sent to a public health laboratory for more accurate influenza testing by molecular assays and viral culture. Top of Page, factors Influencing Results of ridts, widmer many factors can influence the accuracy of ridts, including: Clinical signs and symptoms consistent with influenza. Having clinical signs and symptoms consistent with influenza increases the pre-test probability of influenza virus infection, which increases the reliability of a positive ridt result. Prevalence of influenza activity in the population tested. Time from illness onset to collection of respiratory specimens for testing. Testing specimens collected within 3-4 days of illness onset (when influenza viral shedding is highest) is more likely to yield positive ridt results if the patient has influenza. Type of respiratory specimen tested, rIDTs have different specifications for acceptable specimens (e.g., nasopharyngeal, nasal or throat swab/aspirate).

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strains). Ridts cannot distinguish between seasonal influenza a virus infection and novel influenza a virus infection (due to infection with avian or variant influenza a viruses). Top of Page, use of ridts in Clinical Decision-making. Ridts may be used to help with diagnostic and treatment decisions for patients in clinical settings, such as whether to prescribe antiviral medications. However, due to the limited sensitivities, negative results of ridts do not exclude influenza virus infection in patients with signs and symptoms suggestive of influenza. Therefore, if clinically indicated, antiviral treatment should not be withheld from patients with suspected influenza, even if they test negative by ridt, and further influenza testing of respiratory specimens by molecular assays may be indicated. Antiviral Drugs and recommendations on their use. Testing is not needed for all patients with signs and symptoms of influenza to make antiviral treatment decisions (see figures 1-4). Once influenza activity has been documented in the community or geographic area, a clinical diagnosis of influenza can be made for outpatients with signs and symptoms consistent with suspected influenza, especially during periods of peak influenza activity in the community. Top of Page, use of ridts for Public health Purposes to detect Influenza outbreaks.
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Guidance for Clinicians on the Use of rt-pcr and Other Molecular Assays for diagnosis of Influenza virus Infection creme for more information. Advantages and Disadvantages of ridts, advantages, produce quick result in less than approximately 15 minutes, simple to perform. Some ridts are cleared for office/bedside use. Ridts that have been clia waived can be used in settings that include point-of-care. Disadvantages, sub-optimal test sensitivity, false negative results are common, especially when influenza activity is high. Sensitivity of ridts to detect influenza b viral antigens is lower than for detection of influenza a viral antigens. Although specificity is high, false positive results can also occur, especially during times when influenza activity is low. Some ridts distinguish between influenza a or b viruses while others do not.

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26 October, all everest Trekker made to everest Base camp and Kalapather. All enjoyed whole trek. All member are safe in Kathmandu now, enjoying the last minute shopping and tour. . Ang Shera Shepa 21 October. Latest News From Our everest Basecamp Trek: All members reached everest Basecamp and are now trekking back down the valley. Today they reached Pangboche village at 3900 metres / 12,800 feet. They plan to trek down to lukla and fly back to ktm in a few days. Hannah Rolfson beside the pangboche lama's throne and ceiling umbrella in Pangboche temple.

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Photo lakpa gyeluk sherpa. Puppy enjoys playing with the carpet on the benchesin the teahouse in Pangboche. Mandala 'wheel of life' on the ceiling of the entry gate to tyengboche. Lumber carriers on the suspension bridge to namche. Water powered prayer wheel spins rapidly inside its little house in Fungki thangka village.

Mount Kusum Kanguru towers above a healthy hemlock forest on the trail to everest. Reclining yak and a woman trekking up hill, blindheid along the trail to everest base camp. Brian and Hannah Rolson at the gate to tyengboche monastery. Lakpa gyeluk sherpa Photo. . Temporary enagic bridge over the dudh Khosi river. Back to top, an interesting name for a tea shop. Monks playing volleyball at tyengboche monastery.

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Back to top, hannah Rolfson spins prayer wheels at the pangboche temple. Pangboche's 600 year old temple rises above the rooftops of the village. Boulder carved with prayers lies between two buildings in Pangboche. Note the satellite dish on top and the pile of wild herbs drying at the lower left. Sangeeta meets a family along the path to everest basecamp.

Photo by tile nuru Sherpa. Back to top, baby yak enjoying a delicious lip licking meal. What is a yeti. The bridge over the dudh Khosi river above deboche collapsed in a landslide, wiping out the Ani's water line. Now the sisters of Deboche convent (Nepal's oldest have no water supply. Hannah in a twin room at Sonam Lodge, pangboche. Woman collects yak dung and carries it in her basket along the trail to everest. Brian and Hannah Rolfson at the entry gate to tyengboche.

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Yak wears decolte a freshly repaired pack saddle. Mark mossholder and Sangeeta sindhi walking on the everest Trail. Ancient vessels, butter churns, and chang pots on a shelf inside the pangboche monastery. Elaborate prayer posted above the door in the pangboche gompa. Lama geshe advises Hannah Rolfson. Scary masks and a carved beam support in Pangboche gompa. Pangboche lama prepares to conduct his daily prayer. Tall Juniper rees and a pile of prayer stones in old Pangboche village. Green Tara looks over the pangboche temple.

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AmaDablam while hiking in Khumbu valley. Stupa and AmaDablam dieet close up look from trekking. Thanka at Tangboche monastery. Working on Thanka at Tangboche. Hiking and Trekking in Autumn season. Trekking and hiking in Khumbu valley. Photo leeflang.

Greetings to all everest Base camp lovers! Our team of men and women of all ages have just returned from basecamp. Everyone made it to everest Basecamp and Kala pattar. It was a really exciting trek this year, as the weather was perfect every day. Our strong Sherpa team helped everyone to persevere and the group all succeeded in achieving their goal of reaching basecamp, bolstered by lots of hot tea, delicious food, and warm comfortable lodges all along the way. We welcome them back to sunny warm Kathmandu and Thanks to everyone for Visiting Nepal! Blog posts: Please click one of the links below to go directly to that blog post or just scroll down for everest Basecamp Trek in Nepal News Blog. Members taking photos at basecamp.

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On This Page, background, rapid influenza diagnostic tests (ridts) are immunoassays that can identify the presence of influenza a and b viral nucleoprotein antigens in respiratory specimens, and display the result in a qualitative way (positive. In the United States, a number of ridts are commercially available. Table 1: Influenza virus Testing Methods and, table 2: Characteristics of Rapid Influenza diagnostic Tests.) The reference standards for laboratory confirmation of influenza virus infection in respiratory specimens are reverse transcription-polymerase chain reaction (rt-pcr) or viral culture. Ridts can yield hyaluronzuur results in a clinically relevant time frame,. E., less than approximately 15 minutes. However, ridts have limited sensitivity to detect influenza viruses in respiratory specimens compared to rt-pcr or viral culture and negative ridt test results should be interpreted with caution given the potential for false negative results, especially during peak influenza activity in a community. Some ridts use analyzer reader devices to standardize result interpretation. 1 ridts do not include rapid molecular assays that have higher sensitivity to detect influenza viruses in respiratory specimens compared to ridts.

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