Cockroaches
Cockroaches are an ancient group of insects numbering over 4,600 species, with about 30 associated with humans. Cockroaches have a flattened appearance, long antennae with a downward bent head and their color can range from light to dark brown, to black. Mature female cockroaches produce an egg case which can be found at the tip of the abdomen. In Alameda County, the most common species are the German cockroach, the Turkestan cockroach, and the Oriental cockroach.
Vector Significance
- The German cockroach is the most common cockroach found indoors
- They readily consume human food and can contaminate it with harmful pathogens
- For some individuals, debris from cockroaches, such as feces and shed “skin” may trigger allergic reactions
- Turkestan and Oriental cockroaches are species that prefer to live outdoors, but can accidentally invade homes, causing distress for residents
- Outdoor cockroach species are not considered to be significant vectors of disease-causing pathogens
Vector Control Services
Vector Control Services can:
- Identify the cockroach species
- Identify areas of harborage and attractants
- Advise methods of control and exclusion
Requesting Services
What can the public do?
- Most pest species of cockroaches are controlled successfully with gel baits
- For indoor German cockroach infestations, reducing clutter and cleaning kitchen surfaces are advised
- Larger infestations may require the services of a pest control professional
- For outdoor cockroaches, closing gaps underneath doors (including garage doors) with weather stripping and sealing cracks around pipes and foundations is recommended
- In addition, keeping the foundation free of excess vegetation will reduce harborage
Types of Cockroaches
German Cockroaches
This troublesome pest is found in homes, apartment buildings, warehouses and commercial kitchens. They prefer hiding in warm, humid and dark areas. Large infestations create allergens that may trigger asthma in children or other allergic reactions. They may contaminate food and eating utensils with pathogens such as Staphylococcus and Streptococcus.
Oriental & Turkestan Cockroaches
American Cockroaches
In Alameda County, American cockroaches are mostly limited to sewer systems. They can be found in ground floors of buildings if there are damaged pipes or openings. While they do not commonly infest indoors in Alameda County, they can transmit bacteria such as Salmonella when they get in contact with human or animal feces.