Bed Bugs

Bed bugs are small parasitic insects belonging to the order Hemiptera, commonly referred to as true bugs because of their specialised piercing and sucking mouthparts. Unlike the many plant-feeding insects within this order, bed bugs are ectoparasites that feed exclusively on blood. The most common species affecting humans is Cimex lectularius. Bed Bugs are nocturnal pests, meaning they are most active at night when people are asleep. They feed on human blood at all stages of their life cycle, and in larger infestations, this can lead to frequent biting, irritation and significant discomfort. Although bed bugs are not known to transmit serious diseases, their bites can cause itching, allergic reactions and disrupted sleep, making them a major nuisance pest. Historically, bed bugs were commonly associated with shared accommodation such as hotels, motels, hostels and dormitories. Today, they can be found in any environment, including residential homes, and are most often located in and around bedrooms; particularly in mattresses, bed frames and furniture. Bed Bugs are found worldwide. While their presence declined for a period, there has been a noticeable resurgence since the early 2000s, largely due to increased travel and insecticide resistance.

Bed bugs are small, flat, oval-shaped insects that are visible to the naked eye. Adult bed bugs typically measure around 4-5 mm in length and are a rusty red-brown colour. They do not have wings and cannot fly, but they are fast-moving and excellent at hiding in tight cracks and crevices. Their bodies are usually flat when unfed, allowing them to hide in very narrow spaces. After feeding on blood, their bodies become swollen, elongated and darker in colour. Bed bugs have specialised piercing and sucking mouthparts (a proboscis), which are tucked underneath the head and thorax when not in use. When feeding, this mouthpart extends forward to pierce the skin and draw blood. Juvenile bed bugs (nymphs) look similar to adults but are smaller and lighter in colour, often appearing pale or translucent before feeding. Common Signs of Bed Bugs Bed bugs are not always easy to spot, but there are several signs that may indicate an infestation. Bites on the skin are often one of the first indicators. These may appear as small, red, itchy marks, sometimes occurring in lines or clusters and commonly noticed after sleeping. Reactions vary considerably between people, and some people may show little or no visible reaction. Small blood spots may sometimes be found on sheets, pillowcases or mattresses. Dark spotting is another common sign. Small black or dark-brown marks may occur on mattresses, bed frames, walls, furniture and other areas close to bed bug harbourages. Shed skins and eggs may also be present in cracks and crevices. As bed bugs develop, they shed their outer skins. Their small, pale eggs are cemented to surfaces and may be difficult to detect. In heavier infestations, a musty or slightly sweet odour caused by bed bug secretions may also become noticeable. Recognising signs of bed bug activity early can help prevent an infestation from becoming more extensive.

Life cycle Bed bugs develop through a process known as gradual metamorphosis, progressing from egg to nymph and then to adult. Adult female bed bugs require a blood meal before they can produce eggs. Once fed, they lay eggs in hidden locations such as cracks, crevices, mattress seams, bed frames and nearby furniture; typically close to where people sleep. Eggs are small, white and difficult to see with the naked eye. They are cemented to surfaces in sheltered locations such as cracks and crevices. Female bed bugs generally lay a few eggs each day, although the total number produced during their lifetime varies depending on feeding opportunities and environmental conditions. Under warm conditions, eggs typically hatch within approximately 5–10 days, although development may take longer at lower temperatures. After hatching, juvenile bed bugs (nymphs) require a blood meal before each moult as they develop towards adulthood. Bed bugs pass through five nymph stages before becoming adults, requiring a blood feed between each stage. Under ideal conditions, the full life cycle can be completed in as little as 4-6 weeks. However, in cooler or less favourable environments, development may take several months or longer. Adult bed bugs can live for over a year and are highly resilient. They are capable of surviving for several months without feeding, which makes infestations difficult to eliminate without thorough and targeted treatment.

Habits Bed bugs are obligate blood feeders, meaning all life stages; male, female and nymphs; require blood to survive and develop. They are primarily nocturnal and spend most of the day hiding in cracks and crevices close to where people sleep. Common hiding places include mattresses, bed frames, headboards, bedside furniture, skirting boards and even behind wall fixtures such as power points and picture frames. At night, bed bugs become active and emerge to feed. They are attracted to body heat and carbon dioxide produced by sleeping humans, which helps them locate a host. After feeding, they return to their hiding spots, where they often gather in clusters. Bed bugs prefer to live as close as possible to their food source, which is why infestations are most commonly found in bedrooms. However, as populations grow, they can spread to other areas of the home including lounges, carpets and soft furnishings. Humans are their primary host, but in some situations, bed bugs may also feed on animals such as bats, cats or other mammals. Why Bed Bugs Spread Easily Bed bugs do not fly or jump, but they spread very effectively by hitchhiking on everyday items. They can easily attach themselves to luggage, clothing, bags and personal belongings, allowing them to move from one location to another without being noticed. Travel and accommodation are one of the most common ways bed bugs spread. Hotels, motels and other shared environments can unknowingly transfer bed bugs into luggage, which are then brought back into the home. Furniture and household items are another major source. Second-hand beds, mattresses, lounges and other upholstered items can carry hidden infestations if not carefully inspected. Movement within buildings also allows bed bugs to spread. They can crawl through wall cavities, along skirting boards, and between adjoining rooms, units and apartments, allowing infestations to grow beyond the original area. Because of their ability to spread quietly and quickly, early detection and prompt treatment are essential.

Bed bugs are persistent pests because they spend much of their time concealed in cracks, crevices, furniture and other protected areas close to where people rest or sleep. BITES AND HEALTH EFFECTS When bed bugs feed, they inject saliva containing anticoagulant properties. Reactions to their bites vary considerably. Some people may experience little or no visible reaction, while others develop swelling, itching and irritation. Repeated biting can cause considerable discomfort and may disrupt sleep. Although bed bugs are not known to transmit serious diseases, an established infestation can significantly affect the comfort and wellbeing of occupants. DIFFICULT TO DETECT AND MANAGE Bed bugs can hide in extremely small spaces around mattresses, bed frames, furniture, skirting boards and other areas. Eggs may also be concealed within these harbourages. Their ability to remain hidden, together with their capacity to survive for several months without feeding, can allow an infestation to persist when harbourage areas are overlooked. INFESTATIONS CAN SPREAD Bed bugs can be transported between locations in luggage, clothing, furniture and other personal belongings. Within buildings, they may also crawl into adjoining areas and infest neighbouring rooms or apartments. This is particularly important in accommodation and other premises where there is frequent movement of people and belongings. IMPACT ON HOMES AND BUSINESSES In homes, bed bug activity can cause ongoing irritation, disturbed sleep and frustration for occupants. For hotels, motels, hostels, short-term accommodation and other commercial premises, bed bug infestations can also affect guests, disrupt the use of rooms and potentially damage customer confidence and business reputation.

Effective bed bug management relies on determining the extent of the infestation, identifying potential harbourage areas and considering how bed bugs may have been introduced or spread through the property. Because bed bugs can conceal themselves in very small cracks, crevices, furniture and belongings, management requires a systematic approach rather than concentrating only on the areas where bugs have been seen. Professional pest management can be supported by practical non-chemical measures that reduce harbourage, assist with the management of infested items and reduce the risk of bed bugs being introduced or spread to other areas. PROFESSIONAL PEST MANAGEMENT Professional bed bug management begins with a careful inspection to determine the extent and location of activity. Inspection may include mattresses, bed frames, headboards, furniture, skirting boards, wall linings, curtains, picture frames, fittings and other cracks, crevices and potential harbourage areas around affected rooms. Once the extent of the infestation has been assessed, appropriate treatment methods can be selected according to the location and circumstances of the infestation. Professional management may involve a combination of targeted insecticide applications and other appropriate pest-management methods. Treatment may need to address cracks, crevices, furniture, structural harbourages and other locations where bed bugs or their eggs may be concealed. Potential sources of reinfestation should also be considered. Luggage, clothing, furniture, personal belongings and other items can harbour bed bugs and may reintroduce them into treated areas if they are overlooked. Because infestations and properties differ, the treatment methods used should be determined by the technician following inspection and assessment of the affected areas. PREVENTION & NON-CHEMICAL RISK MANAGEMENT Practical environmental and non-chemical measures can form an important part of bed bug prevention and management. Second-hand furniture, particularly beds, mattresses and upholstered furniture, should be carefully inspected before being brought into a home or building. After travelling, luggage and belongings can be checked for signs of bed bug activity before being stored or returned to bedrooms. Reducing unnecessary cracks, gaps and potential harbourage areas may make rooms less favourable for bed bugs and can also make inspection and management easier. Vacuuming mattresses, bed frames and surrounding areas may assist in physically removing some bed bugs and debris. Appropriate laundering of bedding and clothing can also form part of the management of affected belongings. Steam can be used as a non-chemical management method in suitable areas. When appropriately applied, steam can kill bed bugs and eggs in locations such as mattresses and shallow crevices without leaving chemical residues. During and following professional treatment, care should be taken when moving belongings between rooms. Items that may contain bed bugs should be appropriately checked or managed before being moved into unaffected or treated areas to reduce the risk of spreading or reintroducing the infestation.