Interrupting the chains of transmission of Covid-19 in Italy: survey among the Prevention Departments

BACKGROUND: the ability to implement effective preventive and control measures is rooted in public health surveillance to promptly identify and isolate contagious patients. OBJECTIVES: to describe some organizational aspects and resources involved in the control of Covid-19 pandemic. DESIGN: observational cross sectional study. SETTING AND PARTICIPANTS: a survey of methods and tools adopted by the competent service (Prevention department) in the Local public health units (LHU) of the regional Health services has been performed in May 2020. The survey collected data related to activities carried out during the month of April 2020 on the surveillance system for collection of suspected cases, their virological ascertainment, the isolation procedures and contact-tracing activities by means of an online questionnaire filled in by the public health structure of the regional health system. A convenience sample of Prevention departments was recruited. RESULTS: in 44 Prevention departments of 14 Regions/Autonomous Provinces (caring for 40% of the population residing in Italy), different services were swiftly engaged in pandemic response. Reports of suspected cases were about 3 times the number of confirmed cases in the same month. Local reporting form was used in 46% of the LHUs while a regional form was available in 42% of the Departments (in 9/14 Regions). In one fourth the forms were not always used and 2% had no forms for the reporting of suspected cases. Data were recorded in 52% of LHUs on local databases, while in 20% a regional databases (in 7 Regions) had been created. A proportion of 11% did not record the data for further elaboration. The virological assessment with nasopharyngeal swabs out of the hospital setting was carried out on the average in 7 points in each LHU (median 5) and the average daily capacity was 350 (71 per 100,000) swabs. The rate of subjects newly tested during the month of April was of 893 per 100,000 new people. Data collected at the swabbing were recorded on a regional platform in 17 LHUs (39%) of 8 Regions. In 7% LHUs only positive specimens were recorded electronically. Local files were used in 27% LHUs. The interview with confirmed cases was carried out with a local questionnaire in 52% LHUs, while 14% stated that a standardized form was not used. The data collected about cases were recorded on a regional IT platform in 30% Departments (in 8 Regions) and in 41% data were registered only locally. For each confirmed case in April, a median of 4 contacts were identified. Only 13 (30%) Departments in 9 Regions have registered contact data on a regional database. Ten Departments (23%) have only hard copies, while 56% recorded data on local databases. About 5 health professionals for 100,000 resident population were involved in each LHU in each of the following activities as receiving reports of suspected cases, swabs collection, interviews of cases and contact identifications. CONCLUSIONS: the pandemic required rapidly a great organizational effort and great flexibility to increase response capacity, which now must be strengthened and maintained. Several different tools (forms and electronic files) have been developed in each LHU and used for the same surveillance operational processes with a loss in local efficiency. The inhomogeneous data collection and recording is an obstacle for further analyses and risk identifications and is a missed opportunity for the advancement of our knowledge on pandemic epidemiology analysis. In Italy, updating the pandemic response plans is the priority, at national, regional and local level, and the occasion to fill the gaps and to improve surveillance systems to the interruption of Covid-19 transmission.