Signs that cockroaches are about, apart from actually spotting them, include stains on kitchen surfaces or unpleasant odours. Though they are not directly harmful, they can leave microorganisms which can cause food contamination and the spread of bacteria such as salmonella.
Milagros Fernández of the national association of pest control companies says that there is no firm definition of a "plague" of cockroaches, as the level of risk they pose varies according to where they may appear. In a machinery storeroom, for example, they would not be considered a risk, but in health-care environments they most certainly would be.
After cockroaches, it is termites which are the pests that Rentokil had to deal with most last year, with rodents in third place. Termites are more common in the north of Spain because of the climate and the amount of wood used for buildings. They can cause structural damage and can be problematic for historical buildings and works of art.
Other infestations are as might be expected: bedbugs, wasps, birds, flies, fleas and ants. Gardens are also susceptible to pests, such as aphids and scale insects.
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Surprised to read they are not considered a 'risk' if in a 'machine room'... as they can short circuit electrics. I think it was a Miele bbq grill we bought where the guarantee did not cover damage due to cockroaches...
So Cockroaches are a pest, what is creating the environment for them to exist, is it unclean sewers, poor environmental health control, rubbish created by restaurants and cafes, what is being put into drains one might ask.
There are plenty in government, feeding off the people.
The Kitchens of Restaurants & Hotels, are all infested with cockroaches. They come out in the night, and eat all the spilled food.They cover the dining room floors etc. This is a problem in ALL warm climate Countries. ANTS is another major problem, especially in Hotel Rooms where guests spill food on to the floors. Even on the 6 th. Floors of Hotels.