More Than Just a Nuisance
Many people assume cockroaches are simply unpleasant to look at — a sign of a dirty home rather than a genuine health threat. In reality, cockroaches pose documented health risks to everyone in the household, and the risks are greatest for children, elderly people and anyone with respiratory conditions.
Diseases and Bacteria Carried by Cockroaches
Cockroaches are known to carry and transmit a wide range of pathogens. They pick up bacteria, viruses and parasites as they move through sewers, drains and waste, then transfer them to surfaces in your kitchen, bathroom and living areas.
Documented pathogens associated with cockroaches include:
- Salmonella — A major cause of food poisoning, often spread through contaminated food surfaces
- E. coli — Can cause severe gastrointestinal illness
- Staphylococcus — Linked to skin infections and food contamination
- Campylobacter — A leading cause of bacterial gastroenteritis in Australia
- Listeria — Particularly dangerous for pregnant women and immunocompromised individuals
Contamination occurs when cockroaches walk across food preparation surfaces, cutlery, plates and food items, depositing bacteria from their bodies, saliva and faeces.
Cockroaches and Asthma
This is perhaps the most underappreciated health impact of cockroaches. Cockroach allergens — proteins found in their droppings, shed skin, saliva and decomposing bodies — are a significant trigger for asthma attacks and allergic reactions.
Research consistently shows that:
- Children living in homes with cockroach infestations have significantly higher rates of asthma hospitalisations
- Cockroach allergen exposure is one of the most potent indoor asthma triggers
- Even after a cockroach infestation is eliminated, allergen particles can remain in household dust for months
Other Allergic Reactions
Beyond asthma, cockroach allergens can cause:
- Chronic rhinitis (runny nose, nasal congestion)
- Skin rashes and eczema flare-ups
- Watery or itchy eyes
- In rare cases, anaphylaxis
Can Cockroaches Bite?
Yes, though it is uncommon. Cockroaches are primarily scavengers and not aggressive, but they will bite sleeping humans if food residue is present on skin or lips. Bites can cause localised swelling and in rare cases become infected.
Psychological Impact
Living with a cockroach infestation causes measurable psychological stress — affecting sleep quality, anxiety levels and overall sense of wellbeing. This is particularly true for families with young children.
Protect Your Family
The most effective way to eliminate the health risks associated with cockroaches is professional treatment that targets the entire population — not just the cockroaches you can see. Pestyologist provides safe, effective cockroach treatments for Sydney homes and businesses. Book a treatment today.