A Mysterious Kidney Disease Has Arrived in Texas

Some staggered done the hospital’s doors, arriving astatine each hours of time and night. Others were wheeled successful connected gurneys, their bodies having fixed retired earlier they could scope the emergency department. Many had collapsed astatine work—while coating houses, stapling shingles, aliases paving roads. All had been calved successful Mexico aliases Central America, and astir complained of a crushing fatigue they could nary longer ignore.

Routine humor analyses revealed the cause: kidney failure. They would request dialysis 3 times per week conscionable to enactment alive. What puzzled doctors astir was that they didn’t lucifer emblematic dialysis patients, who are older and person agelong histories of obesity, diabetes, aliases hypertension. These were different patient young men.

For much than a decade, the plight of these patients has haunted Ricardo Nuila, an internist astatine Houston’s Ben Taub Hospital. He saw them almost daily, greeting them pinch the lukewarm grin that lends his acheronian eyes their soul glow. The grin hid his quiet grief. He feared that these men would dice acold excessively early, their kidneys having fixed retired for reasons nary expert tin ascertain.

Nuila wasn’t unsocial successful his concern. Doctors astatine Harris County’s different safety-net hospitals reported seeing overmuch the same. But Nuila sewage a hint astir what mightiness beryllium happening while visiting El Salvador, wherever he’d spent his puerility summers pinch family. The state was dealing pinch a deadly pandemic that affects immense numbers of sugarcane cutters connected plantations passim Central America. It’s known arsenic chronic kidney illness of chartless origin—CKDu—or arsenic Mesoamerican nephropathy. Kidney diseases are among the starring causes of decease successful El Salvador, wherever dialysis is not wide available.

Researchers had recovered signs of CKDu extracurricular Central America, including successful Sri Lanka, India, and Nepal. But it had ne'er been documented successful the United States. If the men arriving astatine Ben Taub were experiencing CKDu, Nuila worried that he mightiness person been witnessing the first activity of a coming tsunami of kidney nonaccomplishment and death—with Texas astatine the center.

Epidemiologists disagree connected precisely what causes CKDu, though studies person consistently identified beingness labour successful utmost power arsenic a contributor. A 2019 article in The New England Journal of Medicine called it “a sentinel illness successful the era of ambiance change.” But studies of CKDu person been particularly challenging to execute because the illness chiefly affects marginalized populations.

The anticipation that CKDu had arrived successful Texas was unnerving, but location was 1 imaginable upside. It could connection an opportunity to harness the cutting-edge aesculapian investigation disposable successful Houston to lick the enigma of CKDu’s origins.

That mightiness forestall young men from being debilitated successful the premier of their lives. 

Dr. Ricardo Nuila successful the ambulance bay extracurricular Ben Taub Hospital, successful Houston, connected April 23, 2026.Photograph by Meridith Kohut

Rebecca Fischer looked up from a half-dissected
rodent to return successful the dense greenery of Nicaragua’s sugarcane fields. She was struck by the beauty of her surroundings—the acheronian soil, the verdant works life, the concatenation of brooding volcanoes opinionated sentry complete it all. The area’s landscape, depicted connected the explanation of the country’s flagship Toña beer, is iconic. Yet alongside this earthy splendor existed an unsettling prevalence of decease and disease.

The rat laic bloody and spread-eagled connected a stainless alloy committee successful beforehand of Fischer. Other dormant creatures surrounded her successful metallic traps. She would carve up their mini bodies—examining organs and removing tissue—in hunt of clues astir CKDu. As she did, her impromptu necropsy suite provided small alleviation from the sweltering tropical sun. The hazmat suit she wore for hours each time became a portable sauna. Sweat poured down her back, having agelong since soaked done her leggings, lightweight tee, and fabric socks.

For the epidemiologist, broiling was a mini value to salary for the chance to ace the enigma of CKDu. The illness had first emerged connected sugarcane plantations successful El Salvador successful the precocious nineties. The region’s rich | volcanic ungraded is cleanable for the crop, and the manufacture offers dependable if meager incomes to a organization that has historically had fewer employment options. But the labour of cutting down towering sugarcane stalks pinch machetes for hours astatine a clip is arduous. It causes immoderate workers to perspire excessively.

By the early aughts, doctors had documented CKDu elsewhere successful Central America. In occidental Nicaragua, wherever sweetener plantations abound, truthful galore men died from the information that the region was nicknamed La Isla de Viudas, the Island of Widows. Coffin making became an in-demand gig successful the municipality of Chichigalpa. In the 2010s locals took to the streets, demanding answers from the authorities and plantation owners.

No 1 could explicate what was going on. Researchers based on endlessly astir imaginable causes. Some endemic diseases, specified arsenic hantavirus and a bacterial infection called leptospirosis, were known to origin kidney failure. Other imaginable contributors were the dousing of crops pinch toxic pesticides and the burning of sugarcane earlier each harvest, which near the crushed covered successful lung- and kidney-clogging ash. Plus, the section h2o wasn’t ever safe to drink, and workers consumed ibuprofen and different organ-damaging painkillers.

Then location was the heat. The sun pounds down relentlessly connected a workforce that performs labour that’s the beingness balanced of moving a half-marathon each day. “They’re for illustration Olympic athletes, and they subsist connected soiled h2o and crappy food,” says Jason Glaser, laminitis and CEO of La Isla Network, an statement based successful Washington, D.C., that advocates for the protection of workers from heat-related illnesses.

In 2014, facing media scrutiny and watching their workforce die, sugar-plantation owners successful Nicaragua asked Kristy Murray, past an epidemiologist astatine the National School of Tropical Medicine, astatine Baylor College of Medicine, successful Houston, for help. Murray’s expertise successful the neglected diseases of Central America made her the cleanable choice.

Murray, who had been Fischer’s adviser, tapped her to lead the effort. That was really respective months later, Fischer, pinch a recently minted doctorate, recovered herself successful the mediate of a plantation successful Nicaragua. She’d brought the biosafety cogwheel to supply protection if the culprit turned retired to beryllium immoderate infectious microorganism aliases bacterium aliases fungus—hypotheses that she initially thought would explicate CKDu.

She trapped, euthanized, and dissected hundreds of rodents successful and astir the sugarcane fields successful the dream that they would clasp the key. She gathered h2o and ungraded samples, arsenic good arsenic humor and urine from sugarcane cutters. Men successful Chichigalpa were truthful concerned astir CKDu that they were consenting to person samples removed from their ain kidneys. One told Fischer, “Take my kidneys. Take everything if you deliberation it will lick this problem.” She secured costs for a fistful of men to recreation to the superior city, Managua, for biopsies.

Her squad besides analyzed aesculapian records from the on-site session astatine 1 plantation. They spent galore tedious hours poring complete moldy, handwritten Spanish-language papers that documented decades of cases of workers who’d gotten sick, including their symptoms and really they were treated. But the task raised much questions than it answered. They still couldn’t nail down a origin of CKDu. The number of cases varied wide from twelvemonth to year—could that beryllium related to the area’s volcanic activity? Might repeated low-grade kidney injuries culminate successful organ failure? Fischer mused connected these and different possibilities arsenic she traveled hundreds of times betwixt Nicaragua and Texas complete the pursuing decade.

Much for illustration nationalist debates complete ambiance change, discussions astir the domiciled of power accent successful CKDu tin beryllium contentious. Some adjacent observers, specified arsenic Glaser, person based on that power unsocial is capable to origin CKDu. His stance has been bolstered by the occurrence of interventions that promote sugarcane cutters to remainder much often successful the shadiness and enactment hydrated. Such measures person slashed rates of kidney wounded among workers. Yet different experts, including Fischer, aren’t convinced.

Fischer doesn’t uncertainty that power is involved, only that it’s the sole cause. She cites findings from studies that were incapable to conclusively norm retired pesticides, dense metals, and different biology conditions arsenic factors. And immoderate of the highest rates of CKDu successful Central America are among shrimp farmers, for whom power accent is acold little of an rumor than it is for sugarcane cutters. She says precocious temperatures and dehydration apt amplify kidney harm from different contributors. “I deliberation the domiciled of power is simply a complicating factor. It complicates immoderate the illness pathology aliases physiology is,” she says. “I don’t deliberation it’s a illness initiator.”

While Fischer racked up frequent-flier miles, migration from Central America to the United States was increasing. She knew that immoderate of the immigrants could beryllium arriving successful an already-compromised state. She couldn’t shingle the anticipation that CKDu mightiness show up successful Texas.

Or possibly it already had.

Fischer astatine Texas A&M, successful College Station, connected April 17, 2026.Photograph by Meridith Kohut

It looked for illustration Coca-Cola. Workers handed Bethany Boggess Alcauter mini integrative cups of their urine hidden successful brownish insubstantial bags. The transactions happened clandestinely, successful fast-food parking tons and different spots adjacent Houston- and Austin-area worksites. Time and again, erstwhile the occupational epidemiologist opened the bags, she discovered that the liquid was distressingly dark.

In early 2022, Boggess Alcauter had launched this aviator study to measurement hydration and kidney usability among Texas building workers. Like Fischer, she had travel to fishy that CKDu mightiness beryllium coming successful the state. Her nationalist wellness inheritance led her to look wherever kidney nonaccomplishment mightiness still beryllium preventable, among the sorts of laborers astir astatine consequence earlier they began showing up astatine hospitals.

Experts couldn’t work together connected whether dehydration was a proximate origin of CKDu, but astir believed it played a domiciled successful the illness. Boggess Alcauter was expecting to find mild dehydration astatine the ends of shifts. Instead, she was alarmed by the acheronian of the urine samples collected earlier the men had moreover begun the day’s work, which suggested terrible dehydration.

Terrified that 1 of these laborers would extremity up successful the emergency room aliases worse, “I fundamentally ruined the study,” Boggess Alcauter says. She would instantly statesman pressing participants to portion much water. Many ended their shifts amended hydrated than erstwhile they began.

Dehydration is simply a truth of life for these workers, a 48-year-old primitively from Honduras told me. Candido Alvarez hangs drywall and performs different building labour successful the Houston area, wherever he has lived for the past decade. Work conditions are often sweltering, without air-conditioning. Alvarez knew that predominant thirst wasn’t bully for him, but he couldn’t do overmuch astir it. His bosses severely constricted h2o breaks, moreover connected the hottest days. He didn’t complain. He simply lived pinch changeless fatigue.

We were introduced done the Houston agency of Workers Defense, an Austin-based nonprofit that advocates for migrant laborers. Alvarez first arrived successful the U.S. much than 20 years ago, moving successful Florida earlier moving backmost to Honduras and past coming to Texas. Numerous times during work, he has been plagued by headaches, musculus cramps, fatigue, and acold sweats—the classical symptoms of a dangerously precocious halfway assemblage temperature. But he didn’t activity aesculapian attention. He had nary insurance, nary doctor—no wellness attraction astatine all.

Nor did Alvarez cognize that specified power vulnerability could person semipermanent effects connected his health. It wasn’t until he volunteered to participate successful a aviator study connected power vulnerability pinch a interrogator from the Occupational Safety and Health Administration, successful the summertime of 2023, that he learned of the connection—and that the power had already begun to impact him. The interrogator recovered humor successful Alvarez’s urine, a marker that his kidneys were opening to struggle. Over time, if thing changed, he would beryllium connected the roadworthy to outright kidney nonaccomplishment and dialysis.

He subsequently began to return statement of really power was affecting his coworkers. Headaches and deficiency of urine accumulation were truthful communal arsenic to spell without remark. Ditto for musculus cramps, weakness, and fatigue. He recalled the informing of the OSHA intelligence astir the dangers of dehydration and tried to portion much water.

State officials either don’t cognize astir the problem aliases don’t care, says Ana Gonzalez, organizing and defense head for the Texas AFL-CIO, successful Austin. In fact, legislators precocious made it easier for businesses to utilization their laborers. Governor Greg Abbott signed a measure prohibiting municipal and region ordinances that require h2o breaks and different heat-mitigating measures successful June 2023. “The activity successful this authorities is caving to typical liking groups and not protecting workers,” Gonzalez says.

Harvesting sugarcane successful Chichigalpa, Nicaragua, is arduous work.Photograph by Meridith Kohut

In the years since Fischer began to interest astir the presence of CKDu successful Texas, she’s heard astir a big of men for illustration Alvarez done the nationalist wellness grapevine. To thief find ways to combat the illness here, she first needed to beryllium that it had go a problem successful the state. To do that, she needed much than anecdotes.

Leaning backmost successful her table chair, Fischer seemed undaunted erstwhile we met connected a sunny outpouring time successful her agleam agency astatine Texas A&M University, successful College Station, her master location since 2018. Clad successful a achromatic T-shirt, worn jeans, and reddish Converse high-tops, and pinch a shaggy bob haircut and acheronian cat-eye glasses, she looked little for illustration an epidemiology professor than the euphony awesome she erstwhile was. “It’s specified a fascinating aesculapian problem, right? A enigma to solve, and truthful galore group want to lick it,” she said. “We are rather far, still, from knowing precisely what’s going on.”

She recounted immoderate of her frustrations. Fischer’s activity successful Nicaragua came to an abrupt halt because of COVID-19 recreation restrictions, conscionable arsenic she was astir to motorboat more-detailed studies. Postpandemic challenges pinch backing besides slowed her efforts. Then, arsenic she turned her attraction to imaginable incidents of CKDu successful Texas, she faced a emblematic nationalist wellness paradox: Until she could beryllium that the illness had go a problem successful the U.S., she couldn’t unafraid assistance money for a study. But, of course, the full constituent of the study was to beryllium that CKDu was a increasing problem successful the country.

She someway needed to place and archive capable cases of the illness to get broader investigation funded. She was improbable to get workplaces to behaviour large-scale testing of their employees, particularly because truthful galore of the affected workers fearfulness participating successful thing that mightiness emblem them for deportation. Most migrants besides don’t person regular wellness care, truthful uncovering them done clinics was not apt to output useful numbers. And authorities databases containing terabytes of accusation connected dialysis patients mostly exclude undocumented immigrants, who don’t suffice for Medicaid aliases Medicare.

Seeking help, Fischer contacted her mentor, Kristy Murray astatine Baylor, who successful move contacted Sreedhar Mandayam, past a nephrologist astatine Ben Taub Hospital. One successful 8 Harris County residents—roughly 600,000 people—is an undocumented immigrant, which made Harris Health, the county’s nationalist wellness system, the cleanable spot to look for CKDu.

Like his workfellow Nuila, Mandayam had noticed an alarming proportionality of emergency-dialysis patients who were young, often undocumented men from Central America aliases Mexico. “We and tons of different group were opening to wonder, ‘Why is this happening?’ ” he says.

Fischer’s study had the imaginable to reply that question. And though she expected to find immoderate cases, she wasn’t prepared for the standard of the problem.

Fischer wearing the benignant of protective cogwheel she dons for fieldwork successful areas pinch biohazards.Photograph by Meridith Kohut

Patient aft diligent laic successful infirmary beds, huddled nether blankets adjacent to a instrumentality the size of a ample filing cabinet. Many of the men had arrived pale, weak, and scared. At first, immoderate hardly had the power to speak. Others greeted chap patients for illustration aged friends; they had been receiving curen together for years. Each had 2 clear integrative lines snaking retired of an arm. One conduit carried humor into the device, wherever a membrane filtered retired toxins. Another returned the cleansed humor to their bodies.

A dialysis instrumentality is an anemic facsimile of a surviving kidney. It useful good capable to support personification alive—barely. Each convention takes respective hours to region toxins that person built up successful the assemblage complete respective days.

At Ben Taub Hospital, the curen room for dialysis patients sits connected the sixth floor, acold from the chaos and scrum of the emergency room. The machines nutrient a persistent, rasping drone that’s occasionally interrupted by alarms beeping to pass of humor clots successful kinked tubing. Adding to the cacophony is the changeless hum of the aerial conditioner fending disconnected the Houston humidity. Amid each the noise, Fischer and her collaborators knew these men offered them an unprecedented opportunity.

Once a man had been hooked up to a machine, a personnel of Fischer’s squad would propulsion up a chair and statesman asking him questions, almost ever successful Spanish. They’d inquire astir wherever he grew up, wherever he lived and worked, what he ate—almost thing they could deliberation of that mightiness person contributed to his condition. Patterns emerged.

Nearly each of the men fresh the well-established floor plan of a CKDu patient—a manual laborer nether forty primitively from Central America aliases Mexico. All were presumed to beryllium undocumented. As Fischer reviewed the question and reply information successful College Station, she realized that this cohort had moreover much successful communal pinch those she’d met successful Nicaragua.

The men successful Houston weren’t sugarcane cutters aliases shrimp farmers, but galore of them had had akin upbringings, raised successful agrarian settings dominated by agriculture. They were apt exposed to akin biology factors, specified arsenic pesticides and pollutants. Also for illustration the Nicaraguans, these men were frightened by the illness and eager for researchers to find the cause. “They are seeing group dice successful their communities,” Fischer says, “and they cognize that they could beryllium next.”

CKDu is simply a test of exclusion. Physicians cognize what it isn’t—kidney illness attributed to the accustomed factors, for illustration hypertension aliases diabetes—even if they can’t precisely opportunity what it is. And erstwhile personification shows up astatine an ER successful request of dialysis, aesculapian unit is typically focused connected stabilizing the patient, not determining the cause.

In summation to the interviews, Fischer and her collaborators combed done the aesculapian records of patients who had received emergency dialysis betwixt 2012 and 2015 astatine immoderate Harris Health hospital. Out of the 346 cases of kidney nonaccomplishment successful uninsured aliases undocumented patients, 17 percent had nary readily identifiable cause. That percent was staggering to the researchers. It suggested that thousands of emergency-dialysis visits successful Texas annually whitethorn beryllium attributable to CKDu. Worse yet, location was nary reliable information connected really galore of those cases had resulted successful death.

Blood samples Fischer collected successful Nicaragua.Photograph by Meridith Kohut

The figures confirmed what Nuila, Mandayam, Boggess Alcauter, and others had suspected: Texas was connected the beforehand statement of the CKDu epidemic. Now, perhaps, further activity to combat the illness could begin. That was astatine slightest the early hope.

Fischer’s squad published its study successful March 2025, and the findings were submitted for adjacent reappraisal astatine a objective investigation journal. Amid a flurry of different catastrophes, specified arsenic outbreaks of bales and vertebrate flu, news of CKDu successful Texas hasn’t triggered overmuch siren successful the broader aesculapian community. “The organization is truthful susceptible and has specified constricted entree to wellness services astatine each that screening for kidney illness is not connected the radar,” Fischer says. “This is simply a illness of poverty. It’s a neglected disease, successful a neglected population, successful a neglected portion of the world, successful impoverished communities that, frankly, galore group are not paying attraction to.”

The Trump administration’s draconian immigration-enforcement and mass-deportation efforts time off CKDu experts much concerned. The most-affected workers are now moreover little apt to activity preventive attraction and little consenting to participate successful investigation connected the causes and curen of CKDu. Climate alteration has Texas summers trending hotter and hotter, while bills proposing regulations to protect laborers from utmost power person gotten obscurity successful caller authorities legislative sessions. “I’m really worried these group are going to autumn done the cracks and die,” says Glaser of La Isla Network.

Fischer’s people heavy consciousness of optimism has lately been tinged pinch much than a hint of governmental exasperation. Hurdles to studying CKDu successful Texas’s migrant population, fto unsocial uncovering prevention methods, person increased. In his Ben Taub office, Nuila laments that gathering patients to trial interventions is each but impossible. “You dream that your patients person capable stableness successful their lives to beryllium capable to dedicate clip to what a study entails, which mightiness beryllium aesculapian visits, humor draws, immoderate the study requires,” he says. “That conscionable requires a level of stableness that does not look to beryllium happening correct now for a batch of patients.”

Making matters worse, the U.S. Department of Labor axed grants to La Isla Network’s rest, shade, and hydration program, which was processing methods to forestall heat-related illnesses successful workers astir the world. “We request to get employers to spot the logic and the benefits down treating outdoor workers for illustration they’re athletes, because they’re burning calories for illustration athletes,” says Boggess Alcauter, who’s now main programs serviceman astatine the National Center for Farmworker Health, successful the Austin suburb of Buda. She argues that this is an economical imperative successful summation to a nationalist wellness concern. “They’re going to do a batch amended successful the workplace if they get a capable magnitude of remainder breaks and electrolytes.”

Nuila still encounters imaginable CKDu patients astatine Ben Taub. What haunts him much than the enigma of the unwellness itself are the patients who person vanished from his life. The visage that returns to his mind again and again is of a young female from Honduras. Her kidneys had minimal usability left, and diagnostics grounded to find immoderate cause. While documented CKDu cases overwhelmingly impact men, the information has been seen successful women.

This woman’s elephantine hazel eyes gave her a perpetually questioning appearance, arsenic if her soul turmoil was etched onto her body. Before Nuila could supply answers—before he could link her to follow-up care, an outpatient nephrologist who could thief prolong her kidney function, aliases organization services to thief supply nutritious food—she disappeared.

Perhaps she returned home. Perhaps she died. Nuila has nary measurement of knowing. Like CKDu, it’s a enigma that remains, for now, unsolvable.  

Carrie Arnold is simply a nationalist wellness journalist who lives successful Virginia pinch her hubby and 2 rescue cats. Her reporting connected this communicative was supported by a fellowship from the Alicia Patterson Foundation.