MERS-CoV Nursing Guide | GCCNurseJobs

MERS-CoV — Key Facts

Middle East Respiratory Syndrome Coronavirus (MERS-CoV) is a zoonotic betacoronavirus first identified in Saudi Arabia in 2012. It remains endemic in the Arabian Peninsula and is particularly relevant to GCC nurses.

Feature	Key Data
First identified	June 2012, Saudi Arabia (Dr. Ali Mohammed Zaki)
Reservoir animal host	Dromedary camels (Camelus dromedarius)
Mortality rate	~35% (much higher than COVID-19)
Transmission to humans	Direct contact with camels (urine, secretions, raw milk), nosocomial (healthcare settings)
Human-to-human transmission	Close contact; nosocomial outbreaks (South Korea 2015 — linked to Hajj travel)
Incubation period	2–14 days (median 5 days)
Geographic distribution	Primarily Arabian Peninsula (KSA, UAE, Qatar, Jordan, Oman, Kuwait); imported cases worldwide

WHY GCC NURSES MUST KNOW THIS: MERS-CoV is endemic in the GCC. Healthcare workers are at high risk in nosocomial clusters. Saudi Arabia accounts for ~85% of all reported cases globally. Hajj season increases risk of spread. Fatality rate ~35% — much higher than COVID-19.

Clinical Features

Clinical Spectrum

Mild/Asymptomatic (Rare)

Subclinical infection
Upper respiratory symptoms only
Often healthcare contacts or camel farmers

Severe (Most Symptomatic)

High-grade fever (>38°C)
Dry cough, dyspnoea
Rapid progression to pneumonia and ARDS
Acute kidney injury (unique to MERS — renal tropism)
Multi-organ failure
GI symptoms: diarrhoea, nausea (30%)

MERS unique feature: Acute kidney injury (AKI) occurs in ~50% of severe cases — highly unusual for respiratory viruses. MERS-CoV binds DPP4 receptors which are expressed on renal tubular cells. Monitor renal function closely in all MERS cases.

Risk Factors for Severe Disease

Diabetes mellitus (very high risk — DPP4 receptor upregulation)
Chronic kidney disease
Cardiac disease
Immunosuppression
Obesity
Age >60 years

Investigation

Test	Purpose
RT-PCR (nasopharyngeal swab + lower respiratory)	Definitive diagnosis; lower respiratory sample preferred (higher viral load)
FBC	Lymphopenia, thrombocytopenia
U&E/creatinine	AKI (unique MERS feature)
LFTs	Elevated transaminases
CXR/CT chest	Bilateral infiltrates, ARDS pattern
LDH, ferritin	Markers of disease severity

Infection Control — MERS-CoV

MERS-CoV requires AIRBORNE + CONTACT + DROPLET precautions (enhanced PPE).

PPE Requirements (Healthcare Workers)

N95/FFP2 respirator (or PAPR for aerosol-generating procedures)
Eye protection (goggles or face shield)
Long-sleeved fluid-resistant gown
Double gloves
Boot covers for high-risk procedures

Aerosol-generating procedures (AGPs) require enhanced precautions + negative pressure room: Intubation, bronchoscopy, suctioning, nebuliser administration, high-flow nasal cannula, NIV, CPR, nasogastric tube insertion

Patient Placement

Single room with negative pressure (airborne infection isolation room — AIIR) if available
If no AIIR: single room, door closed, keep patient isolated; inform infection control
Minimum 6 air changes per hour; preferably 12+
Dedicated nursing staff if possible (cohort care)

Donning and Doffing (Key Sequence)

Donning Order

Hand hygiene
Gown
N95 respirator (fit check)
Eye protection
Gloves (last)

Doffing Order (most contaminated = most critical)

Gloves first (most contaminated)
Hand hygiene
Eye protection
Gown
Respirator (last — face most protected until end)
Hand hygiene

HCW exposure: Any healthcare worker with unprotected exposure to confirmed MERS-CoV patient must be assessed immediately. Self-monitor for 14 days. Active surveillance in high-risk settings. Saudi MOH and WHO have specific guidelines for HCW management post-exposure.

Clinical Management

No specific antiviral therapy is approved for MERS-CoV. Management is supportive.

Supportive Care

Supplemental oxygen (target SpO₂ >94%); escalate to high-flow/NIV/mechanical ventilation as needed
ARDS management: lung-protective ventilation (TV 6 mL/kg IBW, PEEP 5–10, plateau pressure <30 cmH₂O)
Fluid management: conservative in ARDS
Treat AKI: monitor fluid balance, creatinine; renal replacement therapy if severe AKI
Broad-spectrum antibiotics if secondary bacterial pneumonia suspected
Avoid corticosteroids routinely (no mortality benefit, may increase viral shedding)

Hajj Season Protocols

Saudi MOH implements enhanced MERS surveillance during Hajj
Pilgrims with respiratory symptoms screened at port of entry
Healthcare workers at Hajj medical missions must be trained in MERS recognition and PPE
Pilgrims advised to avoid camel contact (markets, racing events) during Hajj
Vulnerable groups (elderly, diabetics, immunocompromised) counselled about risk

Prevention — Camel Contact

Avoid direct contact with dromedary camels (particularly nasal secretions, urine, faeces)
Do not drink raw camel milk or eat undercooked camel products
Hand hygiene after any animal contact
Healthcare workers treating camel farmers or camel market workers should have heightened suspicion for MERS

MCQ Practice — MERS-CoV

Q1. What is the animal reservoir for MERS-CoV and what unusual organ complication distinguishes MERS from other respiratory viruses?

A) Bats; liver failure

B) Pigs; encephalitis

C) Dromedary camels; acute kidney injury

D) Birds; haemorrhagic fever

✅ C — Dromedary camels (Camelus dromedarius) are the primary animal reservoir. MERS-CoV uniquely causes AKI in ~50% of severe cases due to its DPP4 receptor binding on renal tubular cells — distinguishing it from most respiratory viruses. Monitor renal function in all MERS patients.

Q2. A nurse is assigned to care for a suspected MERS-CoV patient in a negative pressure room. What respiratory protection is required?

A) Standard surgical mask is sufficient

B) No mask needed in a negative pressure room

C) N95/FFP2 respirator as minimum; PAPR for aerosol-generating procedures

D) Surgical mask + face shield is equivalent to N95

✅ C — MERS-CoV requires airborne precautions — minimum N95/FFP2 respirator (not surgical mask). For AGPs (intubation, bronchoscopy, suctioning): PAPR or N99/FFP3 + eye protection + double gloves + gown. Negative pressure room is essential.

Q3. In which order should PPE be DOFFED (removed) after caring for a MERS patient?

A) Respirator → Gown → Gloves → Eye protection

B) Gown → Eye protection → Respirator → Gloves

C) Gloves first → Hand hygiene → Eye protection → Gown → Respirator last → Hand hygiene

D) Respirator first → Gloves → Gown → Eye protection

✅ C — Correct doffing order: Gloves (most contaminated, removed first) → Hand hygiene → Eye protection → Gown → Respirator (last, as the face is protected until the very end). Hand hygiene after every step. The respirator touches the face and is removed last to prevent self-contamination.

Q4. Which patient group is at HIGHEST risk of severe MERS-CoV disease requiring ICU admission?

A) Young healthy adults aged 20–30 years

B) Pregnant women in third trimester

C) Patients with diabetes mellitus, chronic kidney disease, or cardiac disease

D) Children under 5 years

✅ C — Diabetes, CKD, cardiac disease, and immunosuppression are major risk factors for severe MERS. Diabetes patients have upregulated DPP4 receptors (the MERS receptor) making them particularly vulnerable. The overall mortality in immunocompromised diabetic patients with MERS exceeds 50%.

MERS-CoV — Nursing Guide