He Farms Ostriches Because Beef Could Kill Him. The Tick Was Bred On Plum Island.
Dale Prewitt-Okafor lost red meat to one bite in 2022 and keeps 40 ostriches. Fifty-four of sixty ticks from his county carry a marker found in six 1978 specimens from the government's island laboratory, and in no wild tick from Texas.
A months-long reporting project. Documents cited below are held in The Vault and available to readers.
CADIZ, Kentucky — Dale Prewitt-Okafor has not eaten beef since the night of 14 September 2022, when a hamburger put him on his kitchen floor at two in the morning with his throat closing.
He had been bitten cutting hay that July. The bite was a Lone Star tick, and what it left in him was an antibody to a sugar that is in every mammal but people, apes and Old World monkeys. Beef, pork, lamb and venison now carry a three-to-six-hour fuse for him. He keeps forty ostriches on eleven acres outside Cadiz because a bird has no such sugar in it and the meat is red.
The tick that bit him has relatives. This newspaper collected sixty adult Lone Star ticks within eleven miles of his hayfield in June. Fifty-four of them carry a stretch of forty-one letters in one salivary gene that six ticks archived in 1978 from a government colony on Plum Island also carry, and that none of forty wild ticks from Texas do.
The Kentucky ticks are the colony's descendants. That is the finding.
The peg
The wire ran the ostrich farmer on Sunday as a feature about making the best of things, which it is. His name is changed here at his request. His county is not.
The sugar
Galactose-alpha-1,3-galactose is a sugar on the surface of mammal cells. The human immune system has no use for it and, once taught to see it as a threat, does not forget.
The teacher is the tick. Its saliva carries the sugar, and a bite delivers it straight through the skin, which is how the body learns to fear a molecule it will next meet in a steak. The reaction is delayed by digestion, which is why the hamburger at seven becomes the ambulance at two.
The Centers for Disease Control counted about 110,000 positive tests between 2010 and 2022 and has said the true number may be four times that. The tick that carries the sugar was, until the 1970s, an animal of Texas and the Deep South.
The colony
Plum Island is a federal laboratory on an island off the end of Long Island. The Army had it first. The Department of Agriculture has had it since 1954, and it kept ticks there the way any laboratory that studies tick-borne disease keeps ticks: in colonies, bred generation to generation, each with a number.
The US National Tick Collection in Statesboro, Georgia, holds six adult Lone Star ticks in a vial labelled "A. americanum, colony PI-7, Plum Island, 1978". The colony card that goes with them, obtained by this newspaper under the Freedom of Information Act, says the line was "selected 11 generations for engorgement weight and salivary volume".
A tick bred for saliva is a tick bred for what it puts into a bite.
The transfer record, obtained under the same request, is dated 3 May 1977. It moves 40,000 PI-7 nymphs from the island to "cooperating station, Region 4". The purpose line says "field trials". The station line is blank. It is signed by the colony supervisor, whose name is on the card and who died in 2003.
What we did
We dragged a white cloth through the grass at three sites in Trigg County with the landowners' permission: the edge of Mr. Prewitt-Okafor's hayfield, a stretch of the Little River bottoms and a woodland margin at the edge of Land Between the Lakes. Twenty adults from each. Forty more came from Kerr County, Texas, where the tick has always lived.
The hundred tubes went to Dr. Ingrid Falk-Oyelowo, a population geneticist in Bozeman, numbered and nothing else. She sequenced the salivary gene in all of them and in the six from Statesboro.
The forty-one-letter insertion is in all six colony ticks. It is in nineteen of twenty from the hayfield, eighteen of twenty from the river and seventeen of twenty from the woodland edge. It is in none of the forty from Texas.
An insertion that long, in that place, does not arise twice. The Kentucky ticks came from the colony.
What the farmer says
Mr. Prewitt-Okafor read the results at his kitchen table with an ostrich egg on it, which he sells for thirty dollars.
"I don't need to know who bred it," he said. "I'd like to know who let it go."
What the department says
The Department of Agriculture's reply is printed whole at the foot of this page. It agrees that the colony existed, that the card is genuine and that the transfer happened. It does not name the station, and it says why.
What this desk takes from it
That a marker is descent and not design. The insertion tells us where the ticks came from. It does not tell us what it does, and we have not said it does.
But the colony card says what the line was bred for, and saliva is where the sugar is, and forty thousand of them went to a station whose name nobody kept.
The ostriches are fine.
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Sources & Method
We drag-sampled three sites in one county with the owners' permission and one county in Texas as a control, sent every tick to a geneticist as a numbered tube, and had six 1978 colony specimens sequenced alongside them under the collection's loan rules. The colony card and the transfer record came out of a Freedom of Information request filed in January 2025. Mr. Prewitt-Okafor's diagnosis is his allergist's, not ours.
Who we spoke to
- Dale Prewitt-Okafor, Ostrich farmer, Trigg County, Kentucky. Interviewed at his farm twice and by telephone; showed our correspondent his medical records at his own suggestion June–September 2026 Name changed at his request. His diagnosis is his allergist's, in a letter we have seen and he has not asked us to print.
- Dr. Ingrid Falk-Oyelowo, Population geneticist, Bozeman, Montana. Genotyped 106 ticks blind for this newspaper; report and raw reads published July–August 2026 Paid at her standard rate. Did not know which tubes were which until the analysis was locked.
- US National Tick Collection, Statesboro, Georgia, Six archived Amblyomma americanum, vial PI-7/1978. Legs from six specimens released for sequencing under the collection's loan rules, with the curator present July 2026
- Agricultural Research Service, US Department of Agriculture, Colony card PI-7 and live arthropod transfer record, 3 May 1977. Obtained under the Freedom of Information Act after 214 days; forty-one of forty-four pages released January 2025–August 2026 The three withheld pages are described as personnel. The station line is blank on the page we have. It is not redacted.
- Centers for Disease Control and Prevention, Alpha-gal syndrome surveillance, 2010–2022. Published figures; written questions answered in two days August 2026
What we could not confirm
- Where the forty thousand went. The transfer names a region and not a station, and the department says the cooperative agreements of that decade were not kept. Kentucky is in Region 4. So are eight other states.
- What the insertion does. Forty-one letters in a salivary gene are a marker of descent and nothing more until somebody measures the saliva, and nobody has. The colony card says what the line was selected for. It does not say the selection worked.
- How many people. The CDC's count is of positive tests, not of people who cannot eat beef, and a positive test in a man who has never had a reaction is a number and not a patient.
How Others Covered This
The same events, as reported elsewhere on the same day. We list what each outlet had that we did not, as well as what we had that they did not — including where we come off worse. Why we print this.
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The Meridian TelegraphKENTUCKY'S OSTRICH MAN AND THE GOVERNMENT TICK THAT MADE HIM
Ran the farm, the birds and the bite, and reached the island in the last paragraph.
Had that we did not
The farmer, warmly and at length.
Left out
The forty ticks from Texas, without which the Kentucky result is a curiosity and not a comparison.
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Signal & LedgerAlpha-Gal Diagnoses Lift Ratite Prices To Ten-Year High
The commodity.
Had that we did not
The price of an ostrich chick, correctly, to the dollar.
Left out
The tick.
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They Buriedthis newspaperHe Farms Ostriches Because Beef Could Kill Him. The Tick Was Bred On Plum Island.
Put sixty ticks and a 1978 vial in front of a geneticist who did not know which was which.
Had that we did not
The colony card, the blank station line and the department's reason for it.
Left out
Sixty ticks from three fields is a sample. It is not a county, and we have called it one twice. — V. Ashcombe-Doyle, standards editor
Right of Reply
They Buried contacted Dr. Roswitha Achebe-Lindgren, Director, Office of Legacy Programs, Agricultural Research Service, US Department of Agriculture sent the full draft, the sequencing report and both records on 27 August; given ten days. Replied on 4 September. Asked that the reply run whole rather than as a quotation. Printed unedited.
I have read your draft and your geneticist's report, and I am going to begin by agreeing with the part of it that is science.
Colony PI-7 existed. The card is genuine and the transfer record is genuine, and I released both to your reporter because they are public records and she asked properly. Your geneticist's work is careful. If she says the Trigg County population descends from PI-7, I have no reason to say otherwise and I am not going to invent one.
Now the headline. It says the tick was bred on Plum Island, as if that were a confession. Every tick in every laboratory in this country is bred. You cannot study a tick-borne disease without a colony, and you cannot keep a colony without selecting it, because a line that will not feed in the laboratory dies out in three generations. Engorgement weight and salivary volume are the two numbers a colony keeper writes down because they are the two numbers that tell you whether the colony will still be there next year. Your story reads them as a purpose. They are a husbandry note.
Descent is not design. Your own desk says so in its last paragraph, and I would have preferred it in the first.
Here is the part I am not comfortable with, and you may print it. I cannot tell you which station received colony PI-7. The cooperative agreements from that decade were not among the records transferred when the island programme closed. I asked. I was told they were not retained. I do not find that satisfactory either, and I have asked again in writing, and if an answer comes it will go to your reporter on the same day it comes to me.
Published unedited under our right-of-reply guarantee.
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