Respiratory Pathogen 6-Plex Detection Kit (Fluorescence PCR)

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Epidemiology

COVID-19 is an acute respiratory disease stemming from SARS-CoV-2, a beta coronavirus. Almost everyone is susceptible. Infected individuals—both symptomatic and asymptomatic—serve as the main sources of transmission. The incubation period spans 1–14 days, typically 3–7 days. Common symptoms include fever, dry cough, and fatigue; some patients also experience nasal congestion, runny nose, sore throat, muscle aches, and diarrhea.

Influenza, or the flu, is a highly contagious acute respiratory illness caused by influenza viruses. It spreads primarily through coughs and sneezes and often peaks in spring and winter. Types A, B, and C exist, but only A and B typically cause human disease. These are single-stranded, segmented RNA viruses. Influenza A, which includes subtypes like H1N1 and H3N2, frequently mutates and can trigger global outbreaks; a "shift" denotes a major genetic change yielding a new subtype. Influenza B, divided into Yamagata and Victoria lineages, evolves more slowly through antigenic drift but still causes respiratory infections and seasonal epidemics.

Adenovirus (AdV) is a non-enveloped, double-stranded DNA virus from the mammalian adenovirus family. With over 90 known genotypes grouped into seven subgenera (A–G), it can cause diverse illnesses such as pneumonia, bronchitis, cystitis, conjunctivitis, gastrointestinal disease, and encephalitis. Adenovirus pneumonia is a notable cause of severe community-acquired pneumonia in children, accounting for roughly 4–10% of cases.

Mycoplasma pneumoniae (MP) is among the smallest prokaryotes, possessing a cell structure but lacking a cell wall, placing it between bacteria and viruses. It predominantly infects the respiratory tract, especially in children and young adults, leading to mycoplasma pneumonia and atypical pneumonia. Typical manifestations include intense cough, fever, chills, headache, and sore throat; upper respiratory infection and bronchial pneumonia are frequent. Severe progression can result in respiratory distress and death.

Respiratory syncytial virus (RSV), an RNA virus belonging to the Paramyxoviridae family, spreads via airborne droplets and close contact. It is the leading cause of lower respiratory tract infection in infants, often causing bronchiolitis and pneumonia, and is associated with subsequent childhood asthma. Infants may exhibit high fever, rhinitis, pharyngitis, laryngitis, and then progress to bronchiolitis and pneumonia; complications can include otitis media, pleurisy, and myocarditis. Older children and adults generally present with milder upper respiratory symptoms.