They reported getting sick with Zika-like symptoms between November 29 and December 1 and were likely infected several days earlier before mosquito control efforts intensified in that part of Brownsville.
"Today's news is a reminder that Zika continues to be a threat to pregnant women and their babies", Dr. Mary T. Bassett, city health commissioner, said in a statement.
A team of researchers in Brazil and Yale School of Public Health have discovered another complication of Zika.
In total, more than 200 infants have been born to women with a Zika virus infection in New York City, according to the health department. More specific guidance for clinicians is available at www.texaszika.org/healthcareprof.htm.
Officials went door to door to educate residents about the disease and how to eliminate mosquitos. "Whenever you see mosquito activity, protect yourself and your family from bites".
Watch Stephen Colbert Take On #Pizzagate and the Alt-Right
Colbert acknowledged he does make some agreements about what to talk about with the people he has on his show, including politicians like Clinton and Trump.
Using air conditioning or window and door screens that are in good fix to keep mosquitoes out of homes.
In late November, the first such case in Texas, contracted by mosquito bite, was reported out of Cameron County.
The locally transmitted Florida cases were detected over the summer. For Cameron County, the benefit will be in place indefinitely as state health officials collect more information about the scope of transmission in Texas. The City of Brownsville has also been spraying to cut down on the number of mosquitos. Most infected people don't have symptoms, but for those who do, it's usually a mild illness with fever, rash and joint pain.
Exposure to the Zika virus during pregnancy causes birth defects of the central nervous system, including microcephaly- abnormal smallness of the head, a congenital condition associated with incomplete brain development. CDC recommends men who have traveled to a Zika-affected area and developed symptoms consistent with Zika during travel or two weeks after travel to use condoms for six months after symptoms begin or to abstain from sex for 6 months.