Die versteckten Gefahren von Bücherläusen Wie diese Schädlinge Ihre Gesundheit schädigen können [research]

Step aside, bedbugs and cockroaches – there’s a new insect in town that’s not afraid to get up close and personal with your cherished books!

Indeed, booklice are invading libraries, homes, and offices all across the world, and they’re not afraid to feast.

This article will explore the subject “Are booklice harmful?” and the health problems caused by booklice.

What are booklice?

Booklice, or psocids, are tiny wingless insects that eat mold and fungi. In buildings, they thrive in locations with lots of organic material like books, paper products, and stored food and can be found in moist, humid situations.

Most adult booklice are little about half a millimeter to five millimeters long. They are rarely visible to the naked eye due to their pale, translucent bodies.

They could be any shade from yellow to brown to gray. Booklice are able to consume microscopic food particles thanks to their long, thin antennae and specially designed mouthparts.

How common are booklice in indoor environments?

Eine Studie von Kawakami et al. published in Urban Pest Manag Journal in 2014 focusing on insect dispersal within Japanese homes, conducted an entomological survey on 20 residences in Tokyo over the summer and fall of 2011.

House dust samples were collected from the floors of living/dining rooms and bedrooms using electric vacuum cleaners, and the number of arthropods in each sample was quantified.

House dust mites topped the list, followed by booklice (Psocodea). This means that booklice are a common household pest. And the most prevalent species of booklice indoors is Liposcelis bostrichophila (Psocodea).

Booklice are common in house hust
Kawakami et al 2014

How do booklice harm human health?

Although booklice do not bite humans, they can still pose a threat to human health through other means.

Booklice can be a significant sensitizer for asthma patients

Recent studies have indicated that booklice are a significant indoor pulmonary allergen. But where can booklice be found?

Booklice primarily feed on mold and are therefore attracted to warm, damp conditions. They are commonly found in homes during the summer and autumn months.

Previous environmental surveys have shown that the number of booklice in homes tends to increase during the summer and autumn, and that they are more commonly found in house dust samples from apartment houses, bedrooms, sunless rooms, and rooms with carpets or Japanese tatami mats.

This suggests that the primary source of booklice allergens for humans is floor dust in dim bedrooms with carpets or tatami mats, rather than dust from mattresses.

Evidence of booklice allergy in asthma patients

In a recent investigation on Japanese patients with atopic asthma, approximately 22% of individuals were discovered to have a particular protein (IgE) in their blood that indicated they were allergic to booklice.

Using tatami mats or carpets in bedrooms was similarly associated with the amount of this protein in the blood, consistent with the findings of an environmental investigation that examined the occurrence of booklice in houses.

In addition, approximately one-third of patients who were allergic to booklice had a specific allergy to this insect, as opposed to an allergy to other insects.

Lip b 1, a protein implicated in this specific allergy to booklice, was discovered to be a new protein with an unknown function.

In a number of nations, including India, China, Iran, France, and Spain, booklice have been detected in houses and have been associated to respiratory allergies.

In a research conducted in Beijing, China, booklice were discovered in almost fifty percent of residences. 25% of house dust samples from patients with respiratory allergies in Mumbai, India included booklice, and 20% of patients with respiratory allergies were found to be allergic to booklice.

There have also been examples of persons developing asthma or allergic reactions after being exposed to booklice in the workplace or after consuming infected oats or rice.

Other varieties of booklice, such as Liposcelis decolor, L. corrodens, L. entomophila, and L. pearmani, are frequently found in indoor environments and are thought to be allergens, although their allergenicity has not been researched.

Do booklice bite? Can booklice cause skin irritation?

Skin irritation
The Hidden Dangers of Booklice How These Pests Can Harm Your Health [research] 6

Booklice, contrary to popular belief, do not bite humans. They can, however, cause certain issues for people.

While booklice do not sink their tiny mandibles into human flesh, they can nevertheless cause skin irritation in certain people if they come into touch with it.

According to studies, up to 30% of those who have had close interactions with booklice have had skin discomfort. And if you’re allergic to their saliva (they do have saliva), you will have some issues. An allergic reaction to booklice can cause redness, swelling, and itching – not exactly what you want from a library visit.

So, if you see a booklouse lurking in the shadows, don’t be alarmed; they’re not out to get you. You should be fine as long as you keep your distance.

Can booklice transmit diseases?

As much as we’d like to think that booklice are harmless little insects who mind their own business and leave us alone, the truth is a little more difficult.

While booklice do not transfer diseases, they have been linked to the spread of infections and illnesses due to their relationship with mold and fungi.

Booklice, for example, have been connected to outbreaks of foodborne illness, with studies indicating that they may be responsible for up to 15% of such outbreaks.

And if you think that’s awful, wait till you hear about the time they were discovered eating on a hospital patient’s open wound. Yikes!

While booklice aren’t disease carriers, it’s still necessary to keep a watch out for them and take precautions to avoid infestations. At the very least, they’re a fantastic reason to keep your kitchen tidy!

How to check for booklice?

Do not be alarmed, we have the answer!

First things first: concentrate your examination efforts on high-risk areas like bookcases, storage bins, and any other potential hiding spots for booklice.

Remember to look under furniture and behind appliances as these crafty creatures like to hide in obscure locations.

The time has come to pull out the big guns: a flashlight and a magnifying glass, after you’ve searched the obvious areas.

These reliable instruments will assist you in identifying any obscure nooks or crannies that might be home to booklice.

A magnifying glass will give you the up-close view you need to positively identify a booklouse if you’re still unsure about whether you’ve found one or simply a piece of lint.

Of course, a thorough cleaning of your high-risk areas is a requirement for any booklice inspection to be successful.

To keep these pests at bay, be sure to frequently clean and vacuum. And if everything else fails, don’t be afraid to call in the experts; a pest management specialist will have the knowledge and resources necessary to permanently eradicate any booklice infestations.


Psocids, often known as booklice, are tiny insects that live in wet, humid areas like houses and other structures.

Despite not biting humans and generally being safe to handle, some people may nevertheless experience skin rashes and allergic reactions.

Through their connection to mold and fungi, they have also been connected to the transmission of infections and diseases.

Keep your home tidy and dry, and routinely check high-risk areas like bookshelves and storage boxes to safeguard your health and avoid booklouse infestations.

Consider consulting a pest management specialist for advice if you think you could have a booklice infestation.

Avoid having your day ruined by booklice by taking action to stop or control infestations and safeguard your health.


What are booklice?

Booklice, or psocids, are little, wingless insects that thrive in warm, humid places like homes and buildings.

Do booklice bite humans?

No, booklice do not bite humans. However, they can cause skin irritation in some individuals if they come into contact with the skin.

Can booklice transmit diseases?

While booklice themselves do not transmit diseases, they have been known to spread infections and illnesses through their association with mold and fungi.

How can I tell if I have a booklice infestation?

Focus your examination efforts on high-risk places like bookshelves, storage boxes, behind appliances, and under furniture if you want to look for booklice. Utilize a flashlight and a magnifying glass to look in tight spaces.

How do I get rid of booklice?

To get rid of booklice, it is important to maintain a clean and dry home and to regularly dust and vacuum high-risk areas. If you suspect that you have a booklice infestation, consider seeking the advice of a pest control expert.

Are booklice harmful to humans?

Even though they don’t bite and are often harmless to people, booklice can nonetheless irritate skin and trigger allergic reactions in some people. Through their connection to mold and fungi, they have also been connected to the transmission of infections and diseases.

How can I prevent a booklice infestation?

It’s critical to keep your home tidy and dry, as well as to frequently dust and vacuum high-risk locations, to avoid a booklice infestation. Keep food properly packaged and stored, and fix any leaks or other moisture sources. If you think you could have a booklice infestation, you might want to consider getting professional pest management help.

Benutzerbild von Martin Miller