San Francisco and Oakland are some of the most rat-infested cities in US, study finds

Click ahead to see the top 10 cities with the worst rat problems, according to data from Orkin pest control. Click ahead to see the top 10 cities with the worst rat problems, according to data from Orkin pest control. Photo: Julie Jacobson, Associated Press Photo: Julie Jacobson, Associated Press Image 1 of / 37 Caption Close San Francisco and Oakland are some of the most rat-infested cities in US, study finds 1 / 37 Back to Gallery

San Francisco and Oakland combined ranked as the fourth “rattiest” cities nationwide according to recent study by Orkin Pest Control.

Orkin ranked the top 50 cities with the worst rat issues based on the number of rodent treatments the company performed at each city from Sept. 2016 to Sept. 2017. The ranking includes both residential and commercial treatments.

Chicago out beat New York as the most rat-infested city in the county — a title it’s carried for three years, according to Orkin.

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In August, Mother Jones wrote that the US is infested with rats and, that in cities like Chicago, increased rodent complaints have prompted city officials to sprinkle rat birth control on the streets.

San Francisco has had its own share of rat complaints and has seen a spike in rat sightings in the last five years. In 2017 alone, 848 calls were made to 311, San Francisco's official site for information and complaints.

RATS IN SF: Rat complaints in San Francisco have surged over the past five years

Other California cities to make the list were Los Angeles (3), Sacramento- Stockton (26) and San Diego (35).

See their full list here.

Take a look at the slideshow above to see the top 10 rat infested cities in the country.