Rats in New York City are widespread, as they are in many densely populated areas. For a long time, the number of rats in New York City was unknown, and a common urban legend declared there were up to five times as many rats as people. In 2014, however, scientists more accurately measured the entire city's rat population to be approximately only 24% of the number of humans. That would reduce the urban legend's ratio considerably, with approximately 2 million rats to New York's 8.4 million people at the time of the study.
The city's rat population is dominated by the brown rat (also known as the Norway rat). The average adult body weight is 350 grams (12 oz) in males and about 250 grams (8.8 oz) in females. The adult rat can squeeze through holes or gaps 1 inch (25 mm) wide, jump a horizontal distance of up to 4 feet (1.2 m) (or vertically from a flat surface to 3 feet (0.91 m)), survive a fall from a height of almost 40 feet (12 m), and tread water for three days.
New York City rats carry pathogens that can cause diarrhea, vomiting, and fever in humans – especially in children. The pathogens they carry include bacteria such as Clostridium difficile (C. diff), Salmonella , E. coli , and Leptospira . Bartonella bacteria cause cat scratch disease, trench fever, and Carron disease. These bacteria may be spread through contact with rat saliva, urine or feces. Rats can carry disease-causing viruses such as sapoviruses, cardioviruses, kobuviruses, parechoviruses, rotaviruses, hepaciviruses, and Seoul virus. Rats may carry fleas that are vectors of diseases such as bubonic plague, typhus, and spotted fever. In addition, some people have an allergic reaction to the presence of rodent hair, urine or feces.
New York City rodent complaints can be made online, or by dialing 3-1-1, and the New York City guide Preventing Rats on Your Property discusses how the New York City Health Department inspects private and public properties for rats. Property owners that fail inspections receive a Commissioner's Order and have five days to correct the problem. If, after five days, the property fails a second inspection, the owner receives a Notice of Violation and can be fined. The property owner is billed for any clean-up or extermination carried out by the Health Department.
Rarely seen in daylight, rats have been reported in New York City since early colonial days. As recently as 1944, two distinct species were prevalent: the brown rat (Norway rat) and the black rat (ship rat, roof rat).Over the next few decades, the more aggressive brown variety displaced the black rats, typically by attacking and killing them, but also by out-competing them for food and shelter. By 2014, the city's rat population was dominated by the brown rat.
The brown rat is 16 to 20 inches (410 to 510 mm) long and weighs 1 to 2 pounds (450 to 910 g). It is brown or gray in color with a lighter-colored belly. It is nocturnal, and sleeps approximately 10 hours a day. The black rat is between 5 to 7 inches (130 to 180 mm) long (not including the tail) and weighs between 2.5 to 8 ounces (71 to 227 g). It is usually black to light brown in color with a lighter-colored belly.
Rats are elusive by nature, and public health officials have not developed any reliable way to estimate their numbers. However, a 2014 study by Jonathan Auerbach, which was reported in the Royal Statistical Society's Significance magazine, estimated that there were closer to 2 million rats in the city.This deposes the often-repeated statistic that there are more rats than people in the five boroughs of New York City (8.4 million in 2014), with some estimates putting the number of rats far higher at as many as five rats per person (33.6 million).
In 2014, the television channel Animal Planet named New York City the "Worst Rat City in the World," and rodentologist Bobby Corrigan called New York City the "USA's No. 1 Pestropolis."Compared to other cities within the United States, studies indicate New York is particularly well-suited for rats. This conclusion is based on characteristics such as human population patterns, public sanitation practices, climate, housing construction standards and other variables. Experts consider that the actual population of rats varies, depending on climate, sanitation practices, efforts to control the population, and season.
Rats only require an ounce (28 grams) of food and water a day to live.Rats primarily find food and shelter at human habitations and therefore interact with humans in various ways. In particular, the city's rats adapt to practices and habits among New Yorkers for disposing of food waste. Curbside overnight garbage disposal from residences, stores, subway and restaurants, as well as littering, contribute to the sustenance of the city's rats. Rats nearly always use the same routes to their food sources. Rat infestations have increased as a result of budget reductions and more wasteful disposal of food.
Rats burrow underground or create nests in suitable soft material, with a small group of rats in each nest. 100 feet (30 m) to 400 feet (120 m) from their food source.Brown rats prefer to live at ground level or below. They congregate in colonies of 30 to 50 rats. Rats live
The rat can squeeze through holes or gaps the size of a quarter (0.955 inches (24.3 mm)), because unlike many mammals its skull is not plated together so it can change the shape of its head and squeeze through a very small opening. They are able to leap 4 feet (1.2 m) laterally and can fall five floors without any injuries. An adult rat can tread water for three days. They typically travel tight, well-worn paths. Each litter has up to a dozen pups. Rats can mate at the age of two or three months and then produce a new litter every two months. The rats live for approximately one year, rarely traveling more than 600 feet (180 m) from where they were born.
The greatest danger to humans is from diseases rats can transmit.City-dwelling rats carry pathogens that can cause diarrhea and vomiting in humans. Disease-causing bacteria commonly carried by rats include E. coli , Clostridium difficile (C. diff), and Salmonella . The bacteria can be spread by contact with rat saliva, urine or feces. Viral diseases spread by rats include rat-bite fever and hemorrhagic fevers caused by Seoul hantavirus.
A survey conducted by Columbia University's Mailman School of Public Health in 2014 studied 133 brown rats from residential buildings in Manhattan.The rats carried numerous pathogens that can cause serious illness in humans, including bacteria (Salmonella and E. coli) that cause food poisoning and dermatitis, pathogens that cause fevers (such as Seoul hantavirus and Leptospira ), sapoviruses, cardioviruses, kobuviruses, parechoviruses, rotaviruses, and hepaciviruses, including some never before seen in New York. While at least 18 of the viruses found are known to cause disease in humans, it is unclear how infectious the rats are to residents. Peter Daszak, president of EcoHealth Alliance, a nonprofit scientific organization that researches links between human health and wildlife, called the study "shocking and surprising". Given the close quarters shared by rats and New York City residents, he found it to be "a recipe for a public health nightmare".
A 2015 joint study by Columbia University and Cornell University found that the rats are commonly infested with fleas, lice, and mites that carry bacteria that can cause disease in humans, including bubonic plague, typhus, and spotted fever. They found an average of five fleas per rat, a sharp increase from a 1925 study that found one out of five rats had no fleas at all.Bartonella pathogens (which can cause cat scratch disease, trench fever, and Carron disease) and various viruses were also found in New York City's rats in this study. These results were confirmed by a study published in 2015 in the Journal of Medical Entomology . A higher risk of allergies and asthma is linked to exposure to rodent hair, droppings, and urine, especially in children.
The NYC Health Department recommends that people bitten by a rat seek immediate medical attention, as bacteria from the rat's teeth can cause tetanus as well as rat bite fever, which can be fatal.
The problem of rats in New York City is a longstanding one. In 1860, The New York Times reported that a newborn infant had died prior to rats eating part of its face and one foot.The NYC Health Department undertook an anti-rat campaign in 1921 that involved rat-proofing as well as trapping and killing rats.
Rats in New York have been known to overrun restaurants after hours and crawl up sewer pipes,as well as enter apartments through toilets. They have attacked homeless people, eaten cadavers in the city morgue, and bitten infants and young children to get food off their faces. Babies are frequent victims, especially if left alone with food or a bottle.
In 2003, a fire station in Queens was condemned and demolished after rats had taken over the building.In 2007, a morning news program featured a live report of a pack of rats overrunning a pair of fast food restaurants in Greenwich Village. In one of the restaurants, a KFC, numerous rats so severely infested the restaurant that they were visible in groups from the street, through the windows.
According to New York City Health Department statistics, there were 86 rat bites reported in 2010. Many bites go unreported. '"In 2011, a video of a rat climbing on a sleeping man's face on the subway went viral. Rats are so common that ex-Manhattan Borough President Scott Stringer quipped in 2013, "The rats don't scurry. They walk right up to you and say, 'How are you, Mr. Borough President?
In 2014, New York City Councilman Mark D. Levine said at a public hearing that "We've had rats who are going into cars and eating out electrical cables. We have rats that are entering homes."He described the problem as "epidemic" on some streets in Manhattan. That year, YouTube videos of rats on subway tracks and in a subway car in New York City went viral, as did videos of rats in a Dunkin' Donuts in Manhattan. In June 2014, residents at adjacent Upper West Side buildings started a rent strike, demanding an end to the rat problem. Also in 2014, Allerton Coops in Bronx Park East received three Notices of Violation from the Health Department and was fined for their inadequate response to a severe rat infestation.
In 2015, a YouTube video of a rat carrying a slice of pizza in the subway went viral.The video was trending worldwide on Twitter and Facebook within 15 hours of the YouTube upload, garnered 5 million views within two days, and spawned similar staged videos with trained rats such as Selfie Rat.
In early 2016, another video of a rat climbing on a sleeping subway rider was uploaded to social media. The uploader was criticized for his choice to film the incident and post it online rather than intervene.
The New York City Department of Health handles enforcement of rat infestation problems in New York City.Local authorities in New York have long recognized that eliminating rats from the city is unrealistic, but have made various efforts to control their prevalence. The approach has traditionally been reactive: after receiving complaints of infestation, officials would commence control efforts at that site by placing rodent poison, traps, or contraceptives.
In recent years, the city adopted a more proactive approach to rodent control known as integrated pest management, which focuses on preventive measures. Such efforts include developing a rodent control map using geotagging to focus countermeasures more systematically, instituting a "Rodent Control Academy" that trains city employees on rat behavior and control, and emphasizing building integrity and garbage disposal.In 2009, the Health Department began offering a half-day course in combating rat infestations. In 2010, the city cut its budget for rodent control programs by $1.5 million to help reduce an overall deficit of $2 billion.
In 2013, it was announced that New York municipal authorities would implement a plan for mass sterilization of the city's rats, using a chemical to neutralize the reproductive systems of female rats. Bait stations loaded with the chemical were to be deployed. The chemical's effects were to gradually shrink the number of kittens a female rat can have in a litter, eventually rendering them infertile.
The Upper West Side and the Upper East Side logged the most rat complaints to the Health Department from 2010 to mid-2014.In 2014 the Health Department hired 9 new inspectors to augment its staff of 45. With $611,000 in funding, the new squad was tasked with targeting major infestations in the South Bronx and Manhattan.
A private group, Ryders Alley Trencher-fed Society, conducts rat hunts in New York using dogs.
New York City property owners and managing agents are legally responsible for keeping their properties rat-free through maintenance measures and the use of pest control professionals.Conditions both inside and outside of buildings, including on public property, that contribute to or allow the establishment of rat populations constitute violations of Article 151 of the Health Code.
Maintenance measures include proper storage of garbage, removal of water sources, and elimination of environments suitable for nesting.Garbage cans need to be rat-resistant and made out of metal rather than plastic. Because rats easily chew through plastic, the Health Department recommends placing plastic garbage bags inside rat-resistant metal garbage cans. Garbage should be placed out on the street close to the pickup time, rather than the night before.
New York City publishes a guide for property owners and tenants, entitled Preventing Rats on Your Property: A Guide for Property Owners and Tenants, that discusses how the Health Department inspects for rats, and how to control rats, including looking for evidence, cleaning up, starving them, shutting them out, and wiping them out.The guide covers the use of traps, rat poison, and wire mesh at the base of trees, as well as the new rules for garbage pickup, with landlords bringing out garbage in the morning immediately prior to pickup rather than the night before. Rodent baiting is suggested as an effective approach to wiping out rats.
New York City property owners and residents are advised to watch for signs of infestation like gnawed wood and plastic and evidence of rat trails. Property should be inspected to look for entry points such as gaps around pipes.
An online map created by the New York City Department of Health enables people to search specific addresses for rat issues.The Village Voice asked readers to email them about incidents of rat sightings.
New York City rodent complaints can be made online,by filling out the New York City Rodent Complaint Form, or by dialing 3-1-1.
The New York City guide Preventing Rats on Your Property discusses how the NYC Health Department, through its Pest Control Services program, inspects private and public properties for rats.Property owners that fail an inspection receive a Health Department Commissioner's Order and have five days to correct the problem. If, after five days, the property fails a second inspection, the owner receives a Notice of Violation and can be fined. If the Health Department feels it must itself exterminate or clean up the property, the property owner is billed (about $1,000 a day in 2004). Unpaid charges become a priority lien against the building, preventing property owners from selling with a clean legal title. Failure to comply with an order of the Commissioner is a misdemeanor, and subjects the landlord to criminal prosecution, a fine and/or imprisonment, as well as additional civil penalties. The penalty for each rodent violation was as high as $2,000 in 2004.
In 2014, New York City Comptroller Scott Stringer criticized the Health Department as "weak" in investigating and fixing residents' rat complaints.From fiscal year 2012 to fiscal year 2013, pest complaints, including rat problems, increased 10 percent in the city, and 24 percent of the time Health Department workers failed to inspect the complaints in the 10-day target period, an audit by the comptroller found. In 160 cases, the Health Department failed to carry out any field inspection. Caroline Bragdon at the Department of Health said: "The inspection is only as good as the inspector on that day and time. If you feel we're really missing the boat, which sometimes we do, let your community board and elected officials know."
In July 2017, the New York City government announced a $32 million rat reduction plan in which it initially aimed to reduce rat infestations by 70% by the end of 2018. The plan would alleviate rat infestations in East Village, Chinatown, and the Lower East Side in Lower Manhattan; Concourse in the Bronx; and Bedford–Stuyvesant and Bushwick in Brooklyn. These neighborhoods were chosen because they had high numbers of rat complaints in the past. The plan included installing padding or tiling on dirt floors in the basements of apartment buildings, installing solar-powered rat-proof trash cans, as well as increased trash management.
Plague is an infectious disease caused by the bacterium Yersinia pestis. Symptoms include fever, weakness and headache. Usually this begins one to seven days after exposure. In the bubonic form there is also swelling of lymph nodes, while in the septicemic form tissues may turn black and die, and in the pneumonic form shortness of breath, cough and chest pain may occur.
Rats are various medium-sized, long-tailed rodents. Species of rats are found throughout the order Rodentia, but stereotypical rats are found in the genus Rattus. Other rat genera include Neotoma, Bandicota and Dipodomys.
The black rat, also known as ship rat, roof rat, or house rat—is a common long-tailed rodent of the stereotypical rat genus Rattus, in the subfamily Murinae.
The brown rat, also known as the common rat, street rat, sewer rat, Hanover rat, Norway rat, Norwegian rat, Parisian rat, or wharf rat is a widespread species of common rat. One of the largest muroids, it is a brown or grey rodent with a head and body length of up to 28 cm (11 in) long, and a tail slightly shorter than that. It weighs between 140 and 500 g. Thought to have originated in northern China, this rodent has now spread to all continents except Antarctica, and is the dominant rat in Europe and much of North America. With rare exceptions, the brown rat lives wherever humans live, particularly in urban areas.
The fancy rat is the domesticated form of Rattus norvegicus, the brown rat, and the most common species of rat kept as a pet. The name fancy rat derives from the idea of animal fancy or the phrase "to fancy". Wild-caught specimens that become docile and are bred for many generations still fall under the fancy type.
Septicemic plague is one of the three main forms of plague. It is caused by Yersinia pestis, a gram-negative species of bacterium. Septicemic plague is a life-threatening infection of the blood, most commonly spread by bites from infected fleas.
In infectious disease ecology and epidemiology, a natural reservoir, also known as a disease reservoir or a reservoir of infection, is the population of organisms or the specific environment in which an infectious pathogen naturally lives and reproduces, or upon which the pathogen primarily depends for its survival. A reservoir is usually a living host of a certain species, such as an animal or a plant, inside of which a pathogen survives, often without causing disease for the reservoir itself. By some definitions a reservoir may also be an environment external to an organism, such as a volume of contaminated air or water.
The Great Plague of Vienna occurred in 1679 in Vienna, Austria, the imperial residence of the Austrian Habsburg rulers. From contemporary descriptions, the disease is believed to have been bubonic plague, which is caused by the bacterium Yersinia pestis, carried by fleas associated with the black rat and other rodents. The city was crippled by the epidemic, which recurred fitfully into the early 1680s, claiming an estimated 76,000 residents.
Murine typhus is a form of typhus transmitted by fleas, usually on rats. Murine typhus is an under-recognized entity, as it is often confused with viral illnesses. Most people who are infected do not realize that they have been bitten by fleas.
Rat-bite fever is an acute, febrile human illness caused by bacteria transmitted by rodents, in most cases, which is passed from rodent to human by the rodent's urine or mucous secretions. Alternative names for rat-bite fever include streptobacillary fever, streptobacillosis, spirillary fever, bogger, and epidemic arthritic erythema. It is a rare disease spread by infected rodents and can be caused by two specific types of bacteria. Most cases occur in Japan, but specific strains of the disease are present in the United States, Europe, Australia, and Africa. Some cases are diagnosed after patients were exposed to the urine or bodily secretions of an infected animal. These secretions can come from the mouth, nose, or eyes of the rodent. The majority of cases are due to the animal's bite. It can also be transmitted through food or water contaminated with rat feces or urine. Other animals can be infected with this disease, including weasels, gerbils, and squirrels. Household pets such as dogs or cats exposed to these animals can also carry the disease and infect humans. If a person is bitten by a rodent, it is important to quickly wash and cleanse the wound area thoroughly with antiseptic solution to reduce the risk of infection.
Rickettsialpox is a mite-borne infectious illness caused by bacteria of the genus Rickettsia. Physician Robert Huebner and self-trained entomologist Charles Pomerantz played major roles in identifying the cause of the disease after an outbreak in 1946 in a New York City apartment complex, documented in "The Alerting of Mr. Pomerantz," an article by medical writer Berton Roueché.
The farm cat, also known as a barn cat, is a domestic cat, usually of mixed breed, that lives primarily out-of-doors, in a feral or semi-feral condition on agricultural properties, usually sheltering in outbuildings. They eat assorted vermin such as rodents and other small animals that live in or around outbuildings and farm fields. The need for the farm cat may have been the original reason cats were domesticated, to keep rodents from consuming or contaminating grain crops stored for later human consumption. They are still commonly kept for their effectiveness at controlling undesired vermin found on farms and ranches, which would otherwise eat or contaminate crops, especially grain or feed stocks. Farm cats hunt the initial rodent population, and pheromones keep further rodents from filling the void.
Seoul orthohantavirus (SEOV) is a member of the Orthohantavirus family of rodent-borne viruses and can cause Hantavirus hemorrhagic fever with renal syndrome (HFRS). It is an Old World hantavirus; a negative sense, single-stranded, tri-segmented RNA virus.
Deadly Eyes is a 1982 Canadian horror film directed by Robert Clouse, very loosely based on the horror novel The Rats by James Herbert. The story revolves around giant black rats who begin eating the residents of Toronto after ingesting contaminated grain.
The discipline of medical entomology, or public health entomology, and also veterinary entomology is focused upon insects and arthropods that impact human health. Veterinary entomology is included in this category, because many animal diseases can "jump species" and become a human health threat, for example, bovine encephalitis. Medical entomology also includes scientific research on the behavior, ecology, and epidemiology of arthropod disease vectors, and involves a tremendous outreach to the public, including local and state officials and other stake holders in the interest of public safety.
Bubonic plague is one of three types of plague caused by bacterium Yersinia pestis. One to seven days after exposure to the bacteria, flu-like symptoms develop. These symptoms include fever, headaches, and vomiting. Swollen and painful lymph nodes occur in the area closest to where the bacteria entered the skin. Occasionally, the swollen lymph nodes may break open.
A robovirus is a zoonotic virus that is transmitted by a rodent vector.
Urban plague is an infectious disease among rodent species that live in close association with humans in urban areas. It is caused by the bacterium Yersinia pestis which is the same bacterium that causes bubonic and pneumonic plague in humans. Plague was first introduced into the United States in 1900 by rat–infested steamships that had sailed from affected areas, mostly from Asia. Urban plague spread from urban rats to rural rodent species, especially among prairie dogs in the western United States.
A feline zoonosis is a viral, bacterial, fungal, protozoan, nematode or arthropod infection that can be transmitted to humans from the domesticated cat, Felis catus. Some of these are diseases are reemerging and newly emerging infections or infestations caused by zoonotic pathogens transmitted by cats. In some instances, the cat can display symptoms of infection and sometimes the cat remains asymptomatic. There can be serious illnesses and clinical manifestations in people who become infected. This is dependent on the immune status and age of the person. Those who live in close association with cats are more prone to these infections. But those that do not keep cats as pets are also able to acquire these infections because of the transmission can be from cat feces and the parasites that leave their bodies.
Ryders Alley Trencher-fed Society (R.A.T.S.) is a New York City group founded in the 1990s that conducts organized rat hunting with dogs. The group was named by founding member Richard Reynolds after Ryders Alley in Manhattan, which was once rat infested, and the trencher-fed pack assembled to hunt. The group often hunts in Lower Manhattan locations like Theatre Alley where garbage is accessible to vermin.