The roach, Blattella germanica, is a worldwide pest, a major cause of allergy-related diseases and a prime route for the spread of pathogens.

The position of the nucleolus organizing region (NOR) in Blattella asahinai differs from that in its close relative, Blattella germanica.

Each female German cockroach can lay as many as 300 eggs.

It was a plan to use genetically altered German cockroaches to breed their kind into extinction.

Of my 21 specimens, 11 are German cockroaches.

A female German cockroach carries an egg capsule containing around 40 eggs.

This species tends to prefer the outdoors, whereas the German cockroach prefers living indoors.

The German cockroach is omnivorous and a scavenger.

There are also tarantulas, scorpions and German cockroaches.

The swarm comprised approximately one million German cockroaches, perhaps the largest household infestation ever recorded.

The German cockroach is coated with an oil that eases its passage into cracks thinner than a paper match.

However, its wings are longer than the German cockroach, and there is a difference between a groove in the abdomen between the two species.

A female German cockroach can produce 8 egg cases in her lifetime and each egg case may contain 30-40 eggs.

The German cockroach is originally from Africa.

The German cockroach utilizes dimethylamine as a pheromone for communication.

Because of it, populations of German cockroaches, by far the most common household variety, have fallen precipitously in many urban areas.

If the population were left unchecked, a single female German cockroach could theoretically give rise to about 40 million offspring in her two-year lifespan.

But Blattella germanica, otherwise known as the German cockroach, actually lives with us in our own homes.

In May, 2013 evidence was discovered that German cockroaches have evolved an aversion to glucose as a way to avoid the "roach motels".

It turns out that it's an immature German cockroach, which means, Sorkin says, it could have been found anywhere.

The German cockroach is thought to have spread from Asia or Africa through Europe via Germany.

In a recent test, Dr. Brenner divided an attic inhabited by an equal number of German cockroaches.

Entomologists report that the new chemicals will cut the German cockroach population by 50 percent to nearly 100 percent, depending on the severity of the infestation.

They need less moisture than the German cockroach so they tend to be more broadly distributed in the home, such as in living rooms and bedrooms.

Subsequently, studies from other parts of the world provided evidence about other indoor allergens, particularly cats, dogs, and the German cockroach [10,11].

The roach, Blattella germanica, is a worldwide pest, a major cause of allergy-related diseases and a prime route for the spread of pathogens.