Pregnant in Miami: Zika’s arrival adds new anxieties

Visitors walk through the Wynwood arts district of Miami

By Letitia Stein and Jilian Mincer

TAMPA, Fla./NEW YORK (Reuters) – Since Florida officials declared that the Zika virus is circulating in the state, Miami-area resident Karla Maguire has avoided taking her toddler son to a playground where mosquitoes may be biting. She walks her dogs less frequently and vigilantly applies bug repellent when she must go outside.

An obstetrician and gynecologist who is herself pregnant, Maguire has become scrupulous about following the advice that she gives patients to protect against Zika, which can cause a rare but devastating birth defect. Maguire works near the city’s Wynwood neighborhood identified on Friday as the first site of local Zika transmission in the continental United States.

“It is frustrating to spend a lot of time avoiding mosquitoes,” said Maguire, a physician at the University of Miami Miller School of Medicine, noting the discomfort of wearing long sleeves during Florida’s steamy summer. “You just end up being inside a lot.”

Physicians in Miami and beyond have seen this week a spike in concerned calls from pregnant women, particularly after health officials advised them not to travel to Wynwood and said any expecting mothers who had done so since mid-June should be tested for Zika.

On Wednesday, Florida said it would provide Zika testing to pregnant women at county health departments at no cost, and make available additional lab services to handle “the expected increase in tests being administered.”

The warnings raised anxiety in a city already on high alert for Zika’s arrival from Latin America, where it has spread quickly since first being detected in Brazil last year. The threat to newborns aside, Zika is otherwise considered a mild illness, and up to 80 percent of people infected have no symptoms.

All summer, Florida health officials have issued daily notices tallying the rise in cases acquired through travel to countries where Zika is widespread and advised the public to protect against mosquito bites. Along with 15 local cases, Florida is monitoring 391 picked up through travel abroad, which include 55 cases involving pregnant women.

One baby born in the state to a woman infected in Haiti has been diagnosed with the birth defect microcephaly, a condition defined by small head size that can lead to developmental problems.

TAILORING THE MESSAGE

Health officials expect that southern U.S. states vulnerable to mosquito-borne disease will see smaller, localized Zika outbreaks, given widespread use of window screens and air conditioning, compared with Latin American countries.

In Miami’s trendy Wynwood district, known as a place to hop between art galleries and tour outdoor murals, some doctors fear that a counterculture ethos may diminish the impact of medical recommendations to combat Zika.

Batsheva Stern, who is 28 weeks pregnant, sees no reason to avoid the district, where her husband, Zak, owns a popular bakery.

“I’m not so nervous,” said Stern, 27, recounting the advice of her midwife: “Don’t freak out, nothing is happening.”

But Dr. Elizabeth Etkin-Kramer, a gynecologist in private practice nearby, worries about birth defects resulting from unplanned pregnancies in some of her Wynwood-area patients who eschew birth control pills, noting the community is also skeptical of vaccines and antibiotics.

On Tuesday, she met with a patient who is 18 weeks pregnant and working near the affected area. The patient questioned her recommendation to be tested for Zika infection.

“Her feeling is, if something is going on, there is nothing you can do about it, short of termination,” said Etkin-Kramer, an officer in the Florida district of the American Congress of Obstetricians and Gynecologists. “I think it would be important to know, and if God forbid she is positive, then we can look closely by ultrasound and get a lot more information.”

Beatriz Mendes Pereira Lopes, 26, an attorney who is five months pregnant, has moved twice trying to avoid Zika. She went to Miami in April, as the hot months in her home of Brazil spurred mosquito breeding.

Last month, she returned to Brazil, now in its cooler winter, anticipating its mosquitoes would be in hibernation. Now that Zika has begun circulating in Miami, she concedes that her future options may be limited until a vaccine is developed.

“It’s impossible to get rid of all the world’s mosquitoes,” she said via email.

(Reporting by Letitia Stein in Tampa, Fla. and Jilian Mincer in New York; Additional reporting by Zachary Fagenson in Miami; Editing by Michele Gershberg and Bernard Orr)

Florida begins insecticide spraying to kill Zika carrying mosquitoes

Aedes aegypti mosquitoes are seen inside Oxitec laboratory in Campinas, Brazil,

By Julie Steenhuysen

CHICAGO (Reuters) – Florida will conduct an aerial insecticide spraying campaign at dawn on Wednesday in an effort to kill mosquitoes carrying the Zika virus, officials in Miami-Dade County said.

The campaign will cover a 10-mile area that includes the one-mile-square area just north of downtown Miami that health officials have identified as the hub of Zika transmission in the state, the officials said on Tuesday.

On Monday, the U.S. Centers for Disease Control and Prevention issued an unprecedented travel warning, urging pregnant women to avoid travel to the Miami neighborhood at the center of the investigation.

The Zika outbreak was first detected last year in Brazil, where it has been linked to more than 1,700 cases of microcephaly, a birth defect marked by small head size that can lead to severe developmental problems in babies. The virus has spread rapidly through the Americas and Caribbean and its arrival in the continental United States has been widely anticipated.

Florida health officials announced another non-travel related case of Zika on Tuesday, bringing the total to 15.

The aerial spraying campaign was recommended by the CDC in conjunction with the Florida Health Department to reduce adult mosquito populations that might be capable of carrying the Zika virus.

In a conference call on Tuesday, CDC Director Dr. Thomas Frieden expressed concern that vector control efforts so far have not been as effective as hoped. A CDC expert is currently conducting tests in Miami to see if mosquitoes in the area have developed insecticide resistance.

Florida had been using two products in the pyrethroid class of insecticides. In its aerial campaign, the state will use a chemical called Naled that has been approved by the U.S. Environmental Protection Agency, according to Joseph Conlon, a spokesman for the American Mosquito Control Association.

Naled is from a different class of insecticides known as organophosphates. According to the CDC, the chemical has been widely used to control mosquito populations in the United States, including in Miami, Tampa and New Orleans.

The CDC recommended the same chemical for aerial spraying in Puerto Rico, but the recommendation has been met with protests from residents concerned about its impact on health, bees, agriculture and the environment.

Miami-Dade health officials said residents do not need to take special precautions during the aerial spraying activities, but it has recommended that people with known allergies remain indoors.

(Reporting by Julie Steenhuysen; Editing by Leslie Adler)

China’s ‘mosquito factory’ aims to wipe out Zika, other diseases

mosquitoes being released

GUANGZHOU, China (Reuters) – Every week, scientists in southern China release 3 million bacteria-infected mosquitoes on a 3 km (two-mile) long island in a bid to wipe out diseases such as dengue, yellow fever and Zika.

The scientists inject mosquito eggs with wolbachia bacteria in a laboratory, then release infected male mosquitoes on the island on the outskirts of the city of Guangzhou.

The bacteria, which occurs naturally in about 28 percent of wild mosquitoes, causes infected males to sterilize the females they mate with.

“The aim is trying to suppress the mosquito density below the threshold which can cause disease transmission,” said Zhiyong Xi, who is director of the Sun Yat-sen University Centre of Vector Control for Tropical Diseases and pioneered the idea.

“There are hot spots,” Xi said. “This technology can be used at the beginning to target the hot spots … it will dramatically reduce disease transmission.”

Mosquito-borne diseases are responsible for more than one million deaths worldwide every year and Zika has become a concern for athletes at this year’s Olympic Games, which open in Rio de Janeiro on Friday.

Some athletes, including the top four ranked male golfers, have declined to take part.

An outbreak of the Zika virus in Brazil last year has spread through the Americas and beyond, with China confirming its first case in February.

U.S. health officials have concluded that Zika infections in pregnant women can cause microcephaly, a birth defect marked by small head size that can lead to severe developmental problems in babies.

The World Health Organization has said there is strong scientific consensus that Zika can also cause Guillain-Barre, a rare neurological syndrome that causes temporary paralysis in adults.

Sun Yat-sen’s Xi said that several countries had expressed interest in his experiments, especially Brazil and Mexico.

In the laboratory, mosquito eggs are collected from breeding cages containing 5,000 females and 1,600 males and injected with the wolbachia bacteria. Xi’s facility has the capacity to breed up to five million mosquitoes a week.

While a female mosquito that acquires wolbachia by mating is sterile, one that is infected by injection will produce wolbachia-infected offspring. Dengue, yellow fever and Zika are also suppressed in wolbachia-injected females, making it harder for the diseases to be transmitted to humans.

Xi set up his 3,500 square meter (38,000 sq ft) “mosquito factory” in 2012 and releases the males into two residential areas on the outskirts of Guangzhou.

Xi said the mosquito population on the island has been reduced by more than 90 percent.

One villager on the island, 66 year-old Liang Jintian, who has lived there for six decades, said the study was so effective he didn’t have to sleep with a mosquito net any longer.

“We used to have a lot of mosquitoes in the past. Back then some people were worried that if mosquitoes were released here, we would get even more mosquitoes,” he said. “We have a lot less mosquitoes now compared to the past.”

(Reporting by Reuters TV; Writing by Clare Baldwin; Editing by Robert Birsel)

CDC to provide $16 million more to fight Zika locally

Warning of mosquitoes carrying disease by CDC

(Reuters) – The U.S. Centers for Disease Control and Prevention (CDC) is making available more than $16 million to states and territories in their fight against the Zika virus, in addition to the $25 million it had sanctioned in July.

The current Zika outbreak was first detected last year in Brazil, where it has been linked to more than 1,700 cases of the birth defect microcephaly, and has since spread rapidly through the Americas.

U.S. health officials on Monday warned pregnant women to avoid traveling to a neighborhood in Miami after the Florida government said it had identified 10 more cases of Zika caused by the bite of local mosquitoes, bringing the total to 14.

The new funding – for 40 states and territories – will be used to provide real-time data about the epidemic as it unfolds in the United States and help those affected by the virus, the CDC said on Tuesday.

Last month, the agency provided $25 million to 53 states, cities and territories as part of its ‘preparedness and response’ funding to areas at risk for outbreaks.

(Reporting by Natalie Grover in Bengaluru; Editing by Saumyadeb Chakrabarty)

FDA takes steps to protect blood supply in Florida amid Zika probe

man having blood drawn

By Julie Steenhuysen and Toni Clarke

CHICAGO (Reuters) – The U.S. Food and Drug Administration has ordered blood banks in Florida’s two most densely populated counties to stop collecting blood as health officials determine whether Zika has begun transmission in the continental United States.

Florida has been investigating four possible cases of local transmission in Miami-Dade County and Broward County. It is the first U.S. state to report cases that may not be related to travel to other countries with active outbreaks.

Zika has struck hardest in Brazil, where the outbreak was first detected last year, and has since spread rapidly through the Americas. The virus can cause a rare birth defect, microcephaly, in newborns whose mothers have been infected, and is believed to be linked to Guillain-Barre syndrome in adults.

Zika most commonly infects people via mosquito bite. But reports of the virus being transmitted through sex and blood transfusions has prompted public health officials to recommend additional precautions for sexual partners and blood banks.

In a statement posted online on Wednesday, the FDA said blood centers in the two Florida counties should stop collecting blood until they can test each unit or put in place technology that can kill pathogens in the blood.

The FDA also recommended that nearby counties implement the same measures as it moves to prevent transmission of the virus through the blood supply.

OneBlood, Florida’s biggest blood collection center, said it will begin testing all of its collections for Zika virus, effective July 29, using an investigational screening test and that it is working as quickly as possible to comply with the FDA’s request.

The FDA has authorized the emergency use of several investigational Zika screening tests, including products made by Hologic Inc and Roche Holding AG.

The agency has also approved a pathogen inactivation technology made by Cerus Corp that kills the virus in blood platelets and plasma. The company is conducting clinical trials to show it can also kill pathogens in red blood cells.

The United States uses roughly 12 million units of red cells, four million plasma units and two million units of platelets a year.

Unlike oxygen-carrying red blood cells, which can be kept for 42 days in a refrigerator, or plasma, which keeps for a year if frozen, platelets have a shelf life of just four to seven days.

Platelets in general tend to be scarce because there are fewer donors. It can take up to two hours to extract platelets using an apheresis machine, said Dr. Richard Benjamin, chief medical officer for Cerus. And because of their short shelf life hospitals typically do not keep much surplus.

It can be hard to source them from elsewhere, too. By the time they are flown from one place to another they may only have two days of life left.

“All we need is a few more Zika hotspots and there will be a shortage of platelets across the country,” Benjamin said.

The FDA’s action follows Florida’s announcement on Wednesday that it had identified two additional Zika cases – one more in each county – that were not related to travel to an area where the virus is being transmitted.

A CDC spokesman said on Wednesday that “evidence is mounting to suggest local transmission via mosquitoes” in South Florida, noting that the cases fit transmission patterns seen with prior mosquito-borne outbreaks such as Chikungunya.

FDA said it will continue to monitor the situation in Florida in cooperation with the CDC and state public health authorities and provide updates as additional information becomes available.

(Reporting by Julie Steenhuysen; Editing by Bernard Orr)

Florida identifies two more Zika cases not related to travel

Aedes aegypti mosquitoes are seen at the Laboratory of Entomology and Ecology of the Dengue Branch of the U.S. Centers for Disease Control and Prevention in San Juan

By Julie Steenhuysen

CHICAGO (Reuters) – The Florida health department said on Wednesday it was investigating another two cases of Zika not related to travel to a place where the virus is being transmitted, raising the possibility of local Zika transmission in the continental United States.

The Florida health department said it has identified an additional case of Zika in Miami-Dade County, where it was already investigating a possible case of Zika not related to travel, and another case in Broward County, where it has been investigating a non-travel related case.

“Evidence is mounting to suggest local transmission via mosquitoes is going on in South Florida,” said CDC spokesman Tom Skinner said.

“These cases fit similar transmission patterns for mosquito-borne diseases such as Chikungunya that we’ve seen in South Florida in years past.”

To confirm whether Zika is being transmitted locally, epidemiologists must survey households and neighbors within a 150-yard radius around the residence of the person who has Zika, which constitutes the flying range of the mosquitoes that carry the virus.

According to the U.S. Zika response plan, Zika transmission is defined as two or more cases not due to travel or sex with an infected person that occur in a 1-mile diameter over the course of a month. Evidence of the virus in local mosquito populations can also be used to confirm local transmission.

Florida heath department officials said investigations into the new cases begins today. The state is urging residents and visitors to participate in requests for urine samples by the department in the areas of investigation. These results will help the department determine the number of people affected.

In addition to the possible cases of non-travel related transmission, Florida on Wednesday reported 328 travel-related cases of Zika. The state is monitoring 53 pregnant women who had Zika infections.

(Reporting by Julie Steenhuysen; Editing by Bernard Orr)

Doctors devise care plan for babies as Zika threat looms in U.S.

mosquito under microscope

By Julie Steenhuysen

CHICAGO (Reuters) – As U.S. public health officials try to determine whether Zika has arrived in the country, doctors are establishing guidelines on how to care for the rising number of babies whose mothers were infected with the virus during pregnancy.

Florida said it is investigating two possible cases of Zika not related to travel to an area where Zika is active, raising the possibility of the first incidence of local transmission of the mosquito-borne virus.

On Thursday, the Florida Department of Health said it was investigating a non travel-related case of Zika in Broward County, marking the second such case. Florida has asked the U.S. Centers for Disease Control and Prevention to assist in its investigation that must also rule out sexual transmission.

So far, 400 pregnant women in the continental United States have evidence of Zika infection, up from 346 from a week ago, the CDC reported on Thursday. All of those were related to travel or sex with an infected person who had traveled.

Three more babies have been born in the United States with birth defects linked to Zika infections in their mothers, bringing the total to 12, CDC said.

Zika has been proven to cause microcephaly, a severe birth defect marked by small head size and undersized brains that requires a complex network of care providers and social workers to treat and provide support to parents.

But microcephaly is just the tip of the iceberg, according to experts speaking at a CDC-sponsored workshop on Thursday. They said many babies exposed in utero who appear normal at birth may have developmental problems down the road, including hearing and vision problems.

For example, babies born without a functional sucking reflex may never develop the ability to swallow and will need to be fed through a feeding tube. These infants will have a higher risk of pneumonia, said Dr. Edwin Trevathan, a pediatrician and child neurologist at Vanderbilt University Medical Center.

Less obvious damage to structures on only one side of the brain may cause seizure disorders that do not appear until adolescence, Trevathan said.

Pediatric experts at the workshop are reviewing the potential consequences of Zika infection and plan to make recommendations on ways to treat Zika-exposed infants.

The connection between Zika and microcephaly first came to light last fall in Brazil, which has now confirmed more than 1,600 cases of microcephaly that it considers related to Zika infections in the mothers.

FLORIDA PROBE

The recommendations come as Florida officials investigate what may be the first cases of Zika in the continental United States caused by the bite of a local mosquito.

Florida officials will not elaborate on how a resident of Miami was infected and whether the first case under investigation was related to mosquitoes.

“We continue to investigate and have not ruled out travel or sexual transmission at this time,” Florida spokeswoman Mara Gambineri said in an email on Thursday. However, she said the state still suspects the case is not related to travel to a Zika-infected area.

The White House on Wednesday released a statement saying President Barack Obama had spoken to Florida Governor Rick Scott regarding a suspected case of mosquito transmission of Zika and promised more money to fight the virus.

At the Zika workshop, Dr. Marc Fischer, chief of surveillance and epidemiology activity at the arboviral diseases branch of the CDC, said the agency has worked with state health departments to establish strategies to identify possible local transmission in the United States.

“When and if there is a case of local transmission, we work with local health departments to identify additional cases to define the geographic scope of the outbreak,” he said.

That includes surveying households and neighbors within a 150-yard radius around the residence of the person who has Zika.

“That’s basically the flying radius of the vector mosquitoes,” he said.

According to the U.S. Zika response plan, Zika local transmission is defined as two or more cases not due to travel or sex with an infected person that occur in a one-mile diameter over the course of a month.

CDC has given Florida $2 million for Zika preparedness, and on Thursday awarded another $5.6 million to assist the state with Zika as part of an additional $60 million in Zika funds to states announced on Thursday. U.S. lawmakers so far have not approved any of the White House’s $1.9 billion request for Zika.

CDC plans to award another $10 million to states and territories on Aug. 1 to speed identification of microcephaly and other birth defects linked to Zika.

(Additional reporting by Bill Berkrot in New York; Editing by Bernard Orr)

Florida health department investigates possible local Zika transmission

Mosquito being studied for Zika

(Reuters) – Florida health officials said on Tuesday they are investigating a case of Zika virus infection that does not appear to have stemmed from travel to another region with an outbreak.

The statement from the Florida Department of Health did not specify whether the Zika case was believed to have been transmitted via mosquito bite, sexual contact or other means.

The department said the case was reported in Miami-Dade County and that it is working with the U.S. Centers for Disease Control and Prevention on an epidemiological study.

The department also reiterated guidance to Florida residents on protecting themselves from mosquitoes that may carry the virus.

“Zika prevention kits and repellant will be available for pickup … and distributed in the area under investigation,” the health department said in a statement. “Mosquito control has already conducted reduction and prevention activities in the area of investigation.”

Zika, which can cause a rare birth defect and other neurological conditions, has spread rapidly through the Americas. A small number of cases of Zika transmitted between sexual partners have also been documented.

There has yet to be a case of local transmission by mosquitoes in the continental United States, though more than 1,300 people in the country have reported infections after traveling to a Zika outbreak area.

U.S. officials have predicted local outbreaks to begin as the weather warms, particularly in southern states such as Florida and Texas.

(Reporting by Michele Gershberg in New York; Editing by Matthew Lewis and Bernard Orr)

CDC monitoring 320 U.S. pregnant women with Zika

A woman looks at a Center for Disease Control (CDC) health advisory sign about the dangers of the Zika virus as she lines up for a security screening at Miami International Airport in Miami, Florida, U.S., May 23, 2016. REUTERS/Carlo Allegri

WASHINGTON (Reuters) – The U.S. Centers for Disease Control and Prevention said on Thursday that it is monitoring 320 U.S. pregnant women with laboratory evidence of Zika virus infection, up from 287 women a week earlier.

However, the number of babies born in the United States with birth defects linked to Zika infection in mothers during pregnancy, or lost pregnancies linked to the virus, remained unchanged from last week’s report at 7 and 5, respectively, according to a CDC registry created last month.

The registry compiles poor outcomes of pregnancies with laboratory evidence of possible Zika virus infection in the 50 states and the District of Columbia. The latest figures are as of June 30.

Zika has caused concern throughout the Americas due to an alarming rise in cases of the birth defect microcephaly and other severe fetal brain abnormalities linked to the mosquito-borne virus reported in Brazil, the country hardest hit by the outbreak. Infants with microcephaly are born with abnormally small heads and may experience potentially disabling developmental problems.

Brazil has confirmed more than 1,600 cases of microcephaly linked to Zika.

All reported U.S. cases of Zika have so far involved people who traveled to areas with a current outbreak, but health experts have warned that local transmission cases are likely to occur in the coming weeks during summer mosquito season. Gulf Coast states, such as Florida and Texas, are seen as particularly vulnerable.

The virus can also be transmitted via unprotected sex with an infected man.

(Reporting by David Morgan in Washington and Bill Berkrot in New York)

Zika sexual transmitting research begins despite funding setbacks

Aedes aegypti mosquitoes are seen inside Oxitec laboratory in Campinas, Brazil

By Bill Berkrot

(Reuters) – It could take years to learn how long men infected with Zika are capable of sexually transmitting the virus, which can cause crippling birth defects and other serious neurological disorders.

In the meantime, health officials have warned couples to refrain from unprotected sex for six months after a male partner is infected. The extraordinary recommendation, based on a single report of Zika surviving 62 days in semen, could affect millions.

The grave risks associated with Zika, along with its potential reach, are driving U.S. health authorities to pursue research even though funding is mired in Congressional gridlock. A study of sexual transmission risk is one example of science that health officials said can’t wait for politics.

Borrowing money earmarked for other programs, the U.S. National Institute of Allergy and Infectious Diseases has started enrolling men infected with Zika in Brazil and Colombia in the study to determine how long the virus remains transmittable in semen. The study could take years to complete, but interim results could help public health officials fine-tune their recommendations on sex.

“We are going out on a limb, but we have to,” Dr. Anthony Fauci, director of the U.S. institute, said in an interview. “We can’t say we’re going to wait until we get all the money.”

Public health officials are alarmed by Zika’s transmission versatility, which has the potential to expand its reach. It is primarily spread by Aedes aegypti mosquitoes, as are the dengue and chikungunya viruses.

But at least 10 countries, including the United States and France, have reported Zika infections in people who had not traveled to an outbreak area but whose sexual partners had. This ability to spread through sex could help Zika gain a further foothold outside the warm habitats of its most effective agent, the mosquito.

CAUTION IN LIEU OF ANSWERS

To protect women who are pregnant or trying to conceive, the U.S. Centers for Disease Control and Prevention recommended couples refrain from unprotected sex for six months – triple the 62 days the virus survived in the semen in one British case study. The World Health Organization recently issued similar guidance.

But such strict advice is not ideal, Dr. Anne Schuchat, a CDC deputy director, said in an interview.

“To tell people not to have sex until we get back to you is not a very satisfying recommendation,” she said. “We would like to have some more understanding of the sexual risk.”

In the U.S. territory of Puerto Rico, where more than 2,100 cases of infection have been reported since the start of the year, health officials are passing out Zika protection kits that include bug spray and condoms, along with the recommendation.

But the warning against unprotected sex isn’t going over very well, said Dr. Chris Prue, a CDC behavioral scientist who has studied the response.

“Condoms are not popular in a lot places,” she said. “There’s religious and personal preferences and lots of personal factors in that.”

U.S. lawmakers deadlocked over funding to fight the Zika virus on Tuesday, as Senate Democrats blocked a Republican proposal they said fell short of the challenge posed by the virus and hurt other health priorities. It was unclear when Congress would revisit the request by President Barack Obama for $1.9 billion.

FUNDING PRIORITIES

In the meantime, the White House has diverted more than $500 million earmarked for other projects for urgent Zika initiatives, including those where scientific opportunities will be lost if not acted upon immediately.

One such study will follow children born to women infected with Zika to identify the development of any disabilities not detected at birth. Other projects on the priority list include vaccine development and mosquito eradication.   One study underway will assess whether the risk of transmission is greater from men who experience Zika infection symptoms, such as fever and rash, than from those who don’t. This information is considered vital since most people experience no symptoms.

The study of infected men in Brazil and Colombia will test semen from thousands of men over time to determine how long Zika poses a risk to sexual partners. As long the virus can be grown in a laboratory from semen cell samples, infectious disease experts believe it is potentially contagious.

Zika typically clears the bloodstream about a week after infection, but it has been detected in urine for at least twice as long. Its persistence in semen in the British case study has caused some researchers to draw comparisons to other viruses.

HIV can last in blood and semen indefinitely, and the mosquito-borne West Nile virus can reside in the kidneys and urine for years, researchers said. One patient who survived the deadly Ebola outbreak had evidence of that virus in his semen for 18 months.

“We got very surprised by Ebola that it was hanging around for so long,” said Dr. Peter Hotez, dean of the National School of Tropical Medicine at Baylor College of Medicine.

“One of the big questions we have to ask is does Zika also cause a similar type of latency?”

(Additional reporting by Julie Steenhuysen; Editing by Michele Gershberg and Lisa Girion)