July–August 2023

Summary Comments

• Most frequently detected viruses across all age groups during August:
  • Rhino/Enterovirus: 34.2%
  • Rhinovirus: 29.3%
  • Metapneumovirus: 10.5%
  • SARS-CoV-2: 9.5%
• Epidemiological Week 1–35:
  • SARS-CoV-2: Positivity increased from 5.7% (week 31) to 10.1% (week 35)
  • RSV A&B: Remained low; 2.2% in week 35
  • Influenza A: Low; only 1% positive in week 35

Respiratory Viral Multiplex PCR and SARS-CoV-2 PCR: All Age Groups

July 2023:

• Rhino/Enterovirus: 27.5%
• Rhinovirus: 24.3%
• Metapneumovirus: 11.0%
• SARS-CoV-2: 9.47%
• Adenovirus: 8.2%
• Parainfluenza 1-4: 4.5%
• RSV: 4.3%
• Influenza A: 3.7%
• Influenza B: 0.1%

August 2023:

• Rhino/Enterovirus: 34.2%
• Rhinovirus: 29.3%
• Metapneumovirus: 10.5%
• SARS-CoV-2: 9.5%
• Adenovirus: 7.2%
• Parainfluenza 1-4: 4.3%
• RSV: 3.1%
• Influenza A: 4.3%
• Influenza B: 0.5%

SARS-CoV-2, Influenza A, RSV Positivity per Week (Weeks 1–35)

• SARS-CoV-2: Gradual rise from week 31 (5.7%) to week 35 (10.1%)
• RSV: Low and stable; 2.2% in week 35
• Influenza A: Consistently low, 1% in week 35

Atypical Bacterial Pathogens (Weeks 1–35)

Total Cases:

• Bordetella pertussis: 449 cases
  • Highest in:
    • 0–6 months: 26%
    • 6–12 years: 22%
    • 1–5 years: 20%
    18 years: 21%
• Mycoplasma pneumoniae: 1225 cases (peak: week 25, 72 cases)
  • Highest in:
    • 1–5 years: 40%
    • 6–12 years: 28%

B. pertussis Weekly Cases (selected weeks):
8, 7, 5, 16, 13, 4, 6, 8, 9, 9, 7, 11, 16, 10, 15, 19, 13, 13, 17, 9, 13, 23, 21, 11, 16, 13, 17, 9, 21, 27, 15, 11, 9, 18, 10

M. pneumoniae Weekly Cases (selected weeks):
4, 6, 10, 7, 5, 11, 12, 17, 12, 18, 25, 30, 23, 34, 37, 36, 34, 42, 42, 52, 46, 63, 62, 57, 72, 48, 57, 53, 45, 46, 48, 41, 40, 49, 41

Paediatric Respiratory Viral Multiplex PCR Data (Ages 0–12)

<1 Year Age Group

July 2023:

• Rhino/Enterovirus: 43.3%
• Rhinovirus: 39.1%
• Metapneumovirus: 13.3%
• Parainfluenza 1-4: 12.9%
• RSV: 8.6%
• Adenovirus: 10.9%
• SARS-CoV-2: 1.7%
• Influenza A: 6.3%
• Influenza B: 0%

August 2023:

• Rhino/Enterovirus: 43.3%
• Rhinovirus: 39.1%
• Metapneumovirus: 13.3%
• Parainfluenza 1-4: 12.9%
• RSV: 8.6%
• Adenovirus: 9.8%
• SARS-CoV-2: 1.7%
• Influenza A: 5.9%
• Influenza B: 0%

1–5 Year Age Group

July 2023:

• Rhino/Enterovirus: 49%
• Rhinovirus: 40%
• Adenovirus: 16%
• Parainfluenza 1-4: 14.2%
• RSV: 4.3%
• Metapneumovirus: 10.3%
• SARS-CoV-2: 5.1%

August 2023:

• Rhino/Enterovirus: 49%
• Rhinovirus: 40%
• Adenovirus: 16%
• Parainfluenza 1-4: 14.2%
• RSV: 4.3%
• Metapneumovirus: 12%
• SARS-CoV-2: 5.1%

6–12 Year Age Group

July 2023:

• Rhino/Enterovirus: 44.2%
• Rhinovirus: 36.1%
• Metapneumovirus: 8.4%
• SARS-CoV-2: 5.6%
• Parainfluenza 1-4: 3%
• Influenza A: 2%
• Influenza B: 0.4%

August 2023:

• Rhino/Enterovirus: 44.2%
• Rhinovirus: 36.1%
• Metapneumovirus: 4.6%
• SARS-CoV-2: 3%
• Parainfluenza 1-4: 1.2%
• Influenza A: 0.9%
• Influenza B: 0%