Ministry of Health Covid Case Definition

A reported case for which no information is yet available to classify it as confirmed, probable or not. The COVID-19 testing plan for Aotearoa, New Zealand outlines how testing will support our COVID-19 response. The COVID-19 Testing Guide provides screening recommendations for healthcare professionals. The WHO case definition guidelines do not explicitly specify a type of test for confirmatory diagnostic tests, but refer to laboratory guidelines that recommend nucleic acid amplification tests (NAATs) such as RT-PCR (28). Many countries may not have taken into account laboratory guidelines and used the WHO case definition to the letter. In fact, we found that 7 countries did not specify any type of test for confirmatory testing. Results suggesting that some countries are using alternatives to NAAT as laboratory evidence are another important finding. Antigen screening, particularly point-of-care testing, has been promoted as a tool for early detection and prevention of asymptomatic spread (10). Guidance on COVID-19 has been produced for a number of health and other sectors. Note: To the extent that a guidance document conflicts with a policy issued by the Chief Medical Officer of Health under section 77.7 of the Health Protection and Promotion Act, the policy prevails. Some genomic sequencing tests approved by the FDA for emergency use do not require an initial polymerase chain reaction (PCR) result. The results of genomic sequencing can be all the health authority receives.

We compared case definitions for suspected, probable and confirmed coronavirus disease (COVID-19) and diagnostic test criteria used in the 25 countries with the highest number of reported cases on 1 October 2020. Of the countries identified, 56% followed World Health Organization (WHO) recommendations to use a combination of clinical and epidemiological criteria in the definition of the suspected case. A total of 75% of identified countries followed WHO recommendations on the use of clinical, epidemiological and diagnostic criteria for probable cases; 72% followed WHO recommendations to perform PCR tests to confirm COVID-19. Finally, 64% of countries used test criteria at least as permissive as the WHO. We observed significant heterogeneity in the eligibility criteria for testing and the definition of a COVID-19 case by countries. This heterogeneity affects the ability to compare the number of cases, transmission and vaccine efficacy, as well as estimates from case surveillance data across countries. We identified suspect case definitions in 24 (96%) of the 25 countries (Table 1; Tables 2 and 3 of the annex. Although Israel does not have an official definition of suspected cases, individuals are considered suspicious due to contact with confirmed cases, which is determined by digital surveillance of mobile phones. We interpreted the alleged contact from Israel, which was determined by mobile phones, as an epidemiological criterion. The 3 most common criteria for defining suspected cases were fever (reported in 92% of countries), cough (reported in 84% of countries) and shortness of breath (reported in 84% of countries). In 7 countries (28%), other criteria were used in addition to the common criteria (Table 1).

The WHO suspected case definition is based on clinical symptoms, including the 3 epidemiological and most common criteria. A total of 14 countries (56%) followed these guidelines largely on the basis of clinical and epidemiological criteria, 10 (40%) countries required only clinical symptoms to define suspected cases, and 2 countries (8%) also incorporated diagnostic tests. The United States relies on laboratory evidence, including antibody or antigen positivity, without clinical signs or epidemiological criteria, while Colombia relies primarily on epidemiological criteria and clinical symptoms, but includes laboratory and radiological tests in its definition to support diagnoses (17, 18). Due to rapid advances in the science of COVID-19 disease and SARS-CoV-2 infection, the Council of State and Territorial Epidemiologists (CSTE) is revising Notice 21-ID-01 to update clinical criteria that have been classified as indicative of infection. improving laboratory criteria to include genomic sequencing; and validate testing performed in non-traditional environments such as workplaces, temporary test sites, home testing, and others. B@DB@D.


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