Respiratory Virus Multiplex PCR and SARS-CoV-2 PCR Data: All Age Groups
Percentage of Specimens Positive
April 2024:
- Influenza A: 29.9%
- Rhino/Enterovirus: 21.1%
- Rhinovirus: 18.9%
- SARS-CoV-2: 6.3%
- RSV: 7.5%
- Adenovirus: 6.5%
- Parainfluenza 1-4: 5.6%
- Human metapneumovirus: 6.1%
- Coronavirus (non-SARS-CoV-2): 2.7%
- Bordetella pertussis: 1.8%
- Mycoplasma pneumoniae: 2.4%
- Bordetella parapertussis: 0.5%
May 2024:
- Influenza A: 39.4%
- Rhino/Enterovirus: 21.4%
- Rhinovirus: 13.5%
- SARS-CoV-2: 4.4%
- RSV: 9.7%
- Adenovirus: 3.0%
- Parainfluenza 1-4: 2.3%
- Human metapneumovirus: 2.9%
- Coronavirus (non-SARS-CoV-2): 2.1%
- Bordetella pertussis: 2.4%
- Mycoplasma pneumoniae: 2.4%
- Bordetella parapertussis: 0.3%
Epidemiological Weeks 1 - 22
Percentage of Specimens Positive by Week (Peaks noted):
- SARS-CoV-2: Stable positivity during the last 4 weeks.
- Influenza A: Peak positivity of 43.6% during week 20. Most subtyped specimens identified as influenza A H1N1 2009 (82%) and influenza B (17%).
- RSV: Peak positivity of 27.8% during week 13, declining to 10% by week 22.
Atypical Bacterial Pathogens:
Cases per Epidemiological Week 1 - 22
Bordetella pertussis cases per week:
- Weeks 1-22: 5, 9, 7, 6, 9, 9, 5, 6, 4, 4, 1, 3, 1, 0, 0, 4, 1, 3, 2, 4, 3, 2
Mycoplasma pneumoniae cases per week:
- Weeks 1-22: 5, 15, 13, 23, 10, 11, 15, 20, 14, 13, 17, 14, 6, 12, 10, 12, 16, 12, 15, 10, 11, 11
Chlamydia pneumoniae cases per week:
- Weeks 1-22: 5, 7, 10, 8, 18, 12, 15, 22, 7, 15, 18, 30, 17, 20, 15, 21, 30, 26, 25, 23, 16, 21
Legionella pneumophila:
- 3 cases detected by PCR testing in May 2024.
Additional Comments:
- Bordetella pertussis, Mycoplasma pneumoniae, and Chlamydia pneumoniae continue to circulate at low levels.
- Bordetella pertussis most commonly detected in the 1–5-year age group (31%), followed by >18 years (27%), and <6 months (17%).
- Most cases of Mycoplasma pneumoniae and Chlamydia pneumoniae detected in the 1–12-year age group.
Age Distribution of Atypical Respiratory Pathogens (Weeks 1-22):
Bordetella pertussis:
- 0-6 months: 17%
- 6-12 months: 8%
- 1-5 years: 31%
- 6-12 years: 17%
- 13-18 years: 1%
- 19-64 years: 18%
65 years: 8%
Mycoplasma pneumoniae:
- 0-6 months: 2%
- 6-12 months: 7%
- 1-5 years: 26%
- 6-12 years: 28%
- 13-18 years: 9%
- 19-64 years: 24%
65 years: 4%
Chlamydia pneumoniae:
- 0-6 months: 1%
- 6-12 months: 3%
- 1-5 years: 46%
- 6-12 years: 35%
- 13-18 years: 2%
- 19-64 years: 12%
65 years: 1%
Paediatric Respiratory Viral Multiplex PCR Data (0 - 12 years)
Most frequently detected viruses per age group (May 2024):
- <1 year age group:
- RSV: 36.5%
- Rhino/Enterovirus: 38.4%
- Influenza A: Notable increase from 5.8% in April to 20.3% in May.
- 1 - 5 year age group:
- Influenza A: 46.4%
- Rhino/Enterovirus: 38.6%
- Rhinovirus: 23.0%
- 6 - 12 year age group:
- Influenza A: 45.7%
- Rhino/Enterovirus: 25.0%
- Rhinovirus: 17.7%
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