Florida reports evidence of local Zika transmission in US

Florida has "local transmission" of Zika: Governor Scott

Four people in Miami likely contracted Zika locally through mosquito bites, Florida's governor said on Friday, the first evidence that the virus tied to a rare but serious birth defect is circulating in the continental United States.

Governor Rick Scott said the state believed active transmission of the virus was occurring within an area of Miami about the size of a square mile (2.6 square kms). Testing showed that one woman and three men had been infected, Scott said.

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While health officials have yet to identify mosquitoes carrying the virus, the state has ruled out other means of transmission, including travel to another country with a Zika outbreak, and sexual contact.

"We have worked hard to stay ahead of the spread of Zika and prepare for the worst," Scott said in a statement. "We will continue to put every resource available to fighting the spread of Zika in our state."

SEE MORE: 50 cities with the most risk for Zika

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50 cities with the most risk for Zika
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50 cities with the most risk for Zika

#50. Midland, Texas

Risk level: 1.38

Mosquito level in January: None
Mosquito level in July: Low
Number of people traveling to the U.S. from Zika countries: <10,000
Population: 161,290

Photo courtesy: Getty

#49. Yuma, Ariz.

Risk level: 1.38

Mosquito level in January: None
Mosquito level in July: Low
Number of people traveling to the U.S. from Zika countries: <10,000
Population: 203,247

Photo courtesy: Getty

#48. Laredo, Texas

Risk level: 1.38

Mosquito level in January: None
Mosquito level in July: Low
Number of people traveling to the U.S. from Zika countries: <10,000
Population: 266,673

Photo courtesy: Getty

#47. El Paso, Texas

Risk level: 1.41

Mosquito level in January: None
Mosquito level in July: Low
Number of people traveling to the U.S. from Zika countries: <10,000
Population: 836,698

Photo courtesy: Getty

#46. Bakersfield, Calif.

Risk level: 1.42

Mosquito level in January: None
Mosquito level in July: Low
Number of people traveling to the U.S. from Zika countries: <10,000
Population: 874,589

Photo courtesy: Getty

#45. Albuquerque, New Mexico

Risk level: 1.42

Mosquito level in January: None
Mosquito level in July: Low
Number of people traveling to the U.S. from Zika countries: <10,000
Population: 904,587

Photo courtesy: Getty

#44. Tucson, Ariz.

Risk level: 1.42

Mosquito level in January: None
Mosquito level in July: Low
Number of people traveling to the U.S. from Zika countries: <10,000
Population: 1,004,516

Photo courtesy: Getty

#43. Salt Lake City, Utah

Risk level: 1.43

Mosquito level in January: None
Mosquito level in July: Low
Number of people traveling to the U.S. from Zika countries: <10,000
Population: 1,153,340

Photo courtesy: Getty

#42. Fresno, Calif.

Risk level: 1.93

Mosquito level in January: None
Mosquito level in July: Low
Number of people traveling to the U.S. from Zika countries: 10,000-500,000
Population: 965,974

Photo courtesy: Getty

#41. Las Vegas, Nev.

Risk level: 1.99

Mosquito level in January: None
Mosquito level in July: Low
Number of people traveling to the U.S. from Zika countries: 10,000-500,000
Population: 2,069,681

Photo courtesy: Getty

#40. Sacramento, Calif.

Risk level: 2

Mosquito level in January: None
Mosquito level in July: Low
Number of people traveling to the U.S. from Zika countries: 10,000-500,000
Population: 2,244,397

Photo courtesy: Getty

#39. San Antonio, Texas

Risk level: 2.03

Mosquito level in January: None
Mosquito level in July: Low
Number of people traveling to the U.S. from Zika countries: 10,000-500,000
Population: 2,328,652

Photo courtesy: Getty

#38. Denver, Colo.

Risk level: 2.2

Mosquito level in January: None
Mosquito level in July: Low
Number of people traveling to the U.S. from Zika countries: 10,000-500,000
Population: 2,754,258

Photo courtesy: Getty

#37. San Diego, Calif.

Risk level: 2.4

Mosquito level in January: None
Mosquito level in July: Low
Number of people traveling to the U.S. from Zika countries: 10,000-500,000
Population: 3,263,431

Photo courtesy: Getty

#36. Phoenix, Ariz.

Risk level: 2.89

Mosquito level in January: None
Mosquito level in July: Low
Number of people traveling to the U.S. from Zika countries: 10,000-500,000
Population: 4,489,109

Photo courtesy: Getty

#35. Montgomery, Ala.

Risk level: 3.92

Mosquito level in January: None
Mosquito level in July: Moderate
Number of people traveling to the U.S. from Zika countries: <10,000
Population: 373,141

Photo courtesy: Getty

#34. Huntsville, Ala.

Risk level: 3.94

Mosquito level in January: None
Mosquito level in July: Moderate
Number of people traveling to the U.S. from Zika countries: <10,000
Population: 441,086

Photo courtesy: Getty

#33. Shreveport, La.

Risk level: 3.95

Mosquito level in January: None
Mosquito level in July: Moderate
Number of people traveling to the U.S. from Zika countries: <10,000
Population: 445,142

Photo courtesy: Getty

#32. Fayetteville, Ark.

Risk level: 3.97

Mosquito level in January: None
Mosquito level in July: Moderate
Number of people traveling to the U.S. from Zika countries: <10,000
Population: 501,653

Photo courtesy: Getty

#31. Jackson, Miss.

Risk level: 4

Mosquito level in January: None
Mosquito level in July: Moderate
Number of people traveling to the U.S. from Zika countries: <10,000
Population: 577,564

Photo courtesy: Getty

#30. Augusta, Ga.

Risk level: 4

Mosquito level in January: None
Mosquito level in July: Moderate
Number of people traveling to the U.S. from Zika countries: <10,000
Population: 583,632

Photo courtesy: Getty

#29. Little Rock, Ark.

Risk level: 4.24

Mosquito level in January: None
Mosquito level in July: Moderate
Number of people traveling to the U.S. from Zika countries: <10,000
Population: 729,135

Photo courtesy: Getty

#28. Columbia, SC

Risk level: 4.36

Mosquito level in January: None
Mosquito level in July: Moderate
Number of people traveling to the U.S. from Zika countries: <10,000
Population: 800,495

Photo courtesy: Getty

#27. Birmingham, Ala.

Risk level: 4.93

Mosquito level in January: None
Mosquito level in July: Moderate
Number of people traveling to the U.S. from Zika countries: <10,000
Population: 1,143,772

Photo courtesy: Getty

#26. Raleigh, NC

Risk level: 5.09

Mosquito level in January: None
Mosquito level in July: Moderate
Number of people traveling to the U.S. from Zika countries: <10,000
Population: 1,242,974

Photo courtesy: Getty

#25. Richmond, Va.

Risk level: 5.12

Mosquito level in January: None
Mosquito level in July: Moderate
Number of people traveling to the U.S. from Zika countries: <10,000
Population: 1,260,029

Photo courtesy: Getty

#24. Louisville, Ky.

Risk level: 5.13

Mosquito level in January: None
Mosquito level in July: Moderate
Number of people traveling to the U.S. from Zika countries: <10,000
Population: 1,269,702

Photo courtesy: Getty

#23. Oklahoma City, Okla.

Risk level: 5.25

Mosquito level in January: None
Mosquito level in July: Moderate
Number of people traveling to the U.S. from Zika countries: <10,000
Population: 1,336,767

Photo courtesy: Getty

#22. Memphis, Tenn.

Risk level: 5.26

Mosquito level in January: None
Mosquito level in July: Moderate
Number of people traveling to the U.S. from Zika countries: <10,000
Population: 1,343,230

Photo courtesy: Getty

#21. Nashville, Tenn.

Risk level: 6

Mosquito level in January: None
Mosquito level in July: Moderate
Number of people traveling to the U.S. from Zika countries: <10,000
Population: 1,792,649

Photo courtesy: Getty

#20. Kansas City, Mo.

Risk level: 6.04

Mosquito level in January: None
Mosquito level in July: Moderate
Number of people traveling to the U.S. from Zika countries: <10,000
Population: 2,071,133

Photo courtesy: Getty

#19. St. Louis, Mo.

Risk level: 6.13

Mosquito level in January: None
Mosquito level in July: Moderate
Number of people traveling to the U.S. from Zika countries: <10,000
Population: 2,806,207

Photo courtesy: Getty

#18. Dallas, Texas

Risk level: 7.11

Mosquito level in January: None
Mosquito level in July: Low
Number of people traveling to the U.S. from Zika countries: 500,000-1,000,000
Population: 6,954,330

Photo courtesy: Getty

#17. Charlotte, NC

Risk level: 7.38

Mosquito level in January: None
Mosquito level in July: Moderate
Number of people traveling to the U.S. from Zika countries: 10,000-500,000
Population: 2,380,314

Photo courtesy: Getty

#16. Washington, D.C.

Risk level: 7.86

Mosquito level in January: None
Mosquito level in July: Moderate
Number of people traveling to the U.S. from Zika countries: 10,000-500,000
Population: 6,033,737

Photo courtesy: Getty

#15. Philadelphia, Pa.

Risk level: 7.86

Mosquito level in January: None
Mosquito level in July: Moderate
Number of people traveling to the U.S. from Zika countries: 10,000-500,000
Population: 6,052,170

Photo courtesy: Getty

#14. Los Angeles, Calif.

Risk level: 7.93

Mosquito level in January: None
Mosquito level in July: Low
Number of people traveling to the U.S. from Zika countries: 500,000-1,000,000
Population: 13,262,220

Photo courtesy: Getty

#13. Savannah, Ga.

Risk level: 7.99

Mosquito level in January: None
Mosquito level in July: High
Number of people traveling to the U.S. from Zika countries: <10,000
Population: 372,708

Photo courtesy: Getty

#12. Tallahassee, Fla.

Risk level: 7.99

Mosquito level in January: None
Mosquito level in July: High
Number of people traveling to the U.S. from Zika countries: <10,000
Population: 375,751

Photo courtesy: Getty

#11. Mobile, Ala.

Risk level: 8

Mosquito level in January: None
Mosquito level in July: High
Number of people traveling to the U.S. from Zika countries: <10,000
Population: 415,123

Photo courtesy: Getty

#10. Charleston, SC

Risk level: 8

Mosquito level in January: None
Mosquito level in July: High
Number of people traveling to the U.S. from Zika countries: <10,000
Population: 727,689

Photo courtesy: Getty

#9. New Orleans, La.

Risk level: 8.01

Mosquito level in January: None
Mosquito level in July: High
Number of people traveling to the U.S. from Zika countries: <10,000
Population: 1,251,849

Photo courtesy: Getty

#8. Atlanta, Ga.

Risk level: 8.13

Mosquito level in January: None
Mosquito level in July: Moderate
Number of people traveling to the U.S. from Zika countries: 500,000-1,000,000
Population: 5,614,323

Photo courtesy: Getty

#7. Houston, Texas

Risk level: 8.14

Mosquito level in January: None
Mosquito level in July: Moderate
Number of people traveling to the U.S. from Zika countries: 500,000-1,000,000
Population: 6,490,180

Photo courtesy: Getty

#6. Jacksonville, Fla.

Risk level: 8.38

Mosquito level in January: Low
Mosquito level in July: High
Number of people traveling to the U.S. from Zika countries: <10,000
Population: 1,419,127

Photo courtesy: Getty

#5. New York, NY

Risk level: 8.49

Mosquito level in January: None
Mosquito level in July: Moderate
Number of people traveling to the U.S. from Zika countries: 1,000,000-2,000,000
Population: 20,092,883

Photo courtesy: Getty

#4. Brownsville, Texas

Risk level: 8.86

Mosquito level in January: Low
Mosquito level in July: Moderate
Number of people traveling to the U.S. from Zika countries: <10,000
Population: 420,392

Photo courtesy: Getty

#3. Tampa, Fla.

Risk level: 9.14

Mosquito level in January: Low
Mosquito level in July: High
Number of people traveling to the U.S. from Zika countries: <10,000
Population: 2,915,582

Photo courtesy: Getty

#2. Orlando, Fla.

Risk level: 9.43

Mosquito level in January: Low
Mosquito level in July: High
Number of people traveling to the U.S. from Zika countries: 500,000-1,000,000
Population: 2,321,418

Photo courtesy: Getty

#1. Miami, Fla.

Risk level: 10

Mosquito level in January: Moderate
Mosquito level in July: High
Number of people traveling to the U.S. from Zika countries: 1,000,000-2,000,000
Population: 5,929,819

Photo courtesy: Getty

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Zika's greatest risk is believed to be posed by infection in pregnant women, given its ability to cause microcephaly in babies, a condition defined by small head size that can lead to developmental problems.

Florida Surgeon General Celeste Philip said that health officials are not advising pregnant women in the transmission area to move.

"We do not believe there will be ongoing transmission," Philip said at a press conference in Orlando, citing daily efforts to control the mosquito population in the area.

U.S. health officials have cautioned for months that the summer mosquito season was likely to bring local outbreaks, with Gulf Coast states such as Florida, Texas and Louisiana, on the frontlines.

The current Zika outbreak was first detected in Brazil last year, triggering global alarm over the discovery that it was linked to microcephaly in infants and other severe neurological abnormalities. Brazil has confirmed over 1,600 cases of microcephaly linked to Zika infection in pregnant women.

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