Embark on a mission to rescue the dog afflicted by ear parasites, a condition that has tragically resulted in the loss of his hearing.

The two-year-old dog became lethargic, thin and listless, deteriorating to the point that it was admitted to a pet hospital for a week for a blood transfusion.

“I was really worried about him,” Ms Powell, an enrolled nurse, said.

Testing confirmed Leo had ehrlichiosis, a disease transmitted through bites from brown dog ticks carrying the Ehrlichia canis bacteria.

But what worried the specialists is that Leo lives in the urban Top End, which some experts fear is becoming a new stronghold for a disease spreading like wildfire.

The first Australian case was detected in the Kimberley region of Western Australia in May last year.

By June, cases were rapidly emerging in Katherine in the Northern Territory and the surrounding remote communities.

A grey staffy-cross with its paw on its owner's knee.
Leo spent a week in pet hospital and still needs regular blood tests and check-ups. (ABC News: Dane Hirst)

The Northern Territory government has recorded 370 confirmed cases — 110 in the Darwin and Arnhem Land region, 149 in the Katherine region, 36 in Tennant Creek and in Alice Springs and surrounds, 75.

Experts say countless more have been left undetected in remote communities with little intervention.

“When we finally got to bring him home, [the vets] said he needs to stay inside, he’s at risk of spontaneous bleeding and he might not make it,” Ms Powell said.

“It was very full-on, very emotional.

“There were tears basically every night.”

Until the first cases were discovered just last year, stringent biosecurity controls had kept ehrlichiosis out of Australia.

Experts are still baffled by how the disease got in but, according to Professor Peter Irwin from the School of Veterinary Medicine at Murdoch University, the disease is now considered “endemic” across the NT.

“Ehrlichiosis is one of the most serious diseases of dogs in my opinion,” he said.

“It makes them very ill, and many dogs can die.

“Once it establishes into a tick population, it’s very difficult to eradicate.”

Common symptoms include lethargy, fever and cloudy eyes, which can be cleared up with antibiotics but, if left untreated, the disease can lead to blindness, uncontrollable bleeding and death.

“The problem with this disease is that dogs travel and spread infected ticks,” Professor Irwin said.

“Dogs that have moved from an endemic area of the community into the city will possibly bring ticks with them, and the ticks can then drop off.

“There have now been dogs with the disease identified in most other capitals, most as a result of travel from the north.”

Doctor Stephen Cutter, the head veterinarian at Darwin’s Ark Animal Hospital, is no stranger to the crippling disease.

He said up to 40 per cent of the dogs are infected in the remote communities of the Top End he visits on rotation.

But in August of last year, he saw his first case in a pet that had not left urban Darwin.

Arielle Giles, a vet at the Darwin Veterinary Hospital, confirmed the disease’s spread to Darwin, saying she had seen six cases in the past three months.

A vet inspects a small dog in a clinic.
Dr Stephen Cutter says ehrlichiosis is now “widespread” across the Northern Territory. (ABC News: Dane Hirst)

“It’s a devastatingly bad disease and it’s really difficult to treat,” Dr Cutter said.

“It’s basically everywhere and it’s now a matter of living with it.”

Both Professor Irwin and Dr Cutter said keeping ticks at bay is the best way to prevent ehrlichiosis.

“Because the infection is transmitted so quickly from the tick bites, the most important way of protecting your dog is to use a product, such as a collar that kills ticks before they bite,” Professor Irwin said.

It has now been five months since Leo was struck down by the tiny parasite and, while he is still getting regular check-ups and his future is looking brighter, vets can’t give the all-clear.

“Ehrlichiosis is really nasty in that it can stay hidden in the bone marrow for a long period of time,” Dr Cutter said.

Earlier this year, the NT government brought on a new coordinator to transition the NT’s response to the disease from a biosecurity threat to managing the outbreak.

“This disease is a nationally notifiable disease, which means that suspected cases of E.canis need to be reported, and free testing can be carried out on blood samples from suspected dogs,” said the chief vet at the Department of Industry, Tourism and Trade, Dr Sue Fitzpatrick.

20 Pairs of People Who Made Us Believe That Time Travel Is Already Possible

Although each person is born with a unique set of genes, when kids are born, it’s impossible to avoid conversations about who they look the most like. And some people are lucky enough to find resemblances to their older ancestors, like a bolt from the blue. With children looking like an exact copy of their parents and grandparents, we’re almost ready to believe that it’s a result of some kind of reincarnation or wizardry.

And while scientists are still scratching their heads about our genes, we at Bright Side simply can’t help but wonder about what miracles nature is really capable of.

1. Princess Diana and her grandmother, Cynthia, made us wonder whether time travel already exists.

2. “A side by side of my 3x great-grandmother and my mother”

3. “I think I might be a clone and no one told me.”

4. This family’s genes are so strong.

5. “My dad and me, 1980 vs 2020”

6. “This is me in the mid-’90s and my son in 2020, not quite the same pose, but I like seeing the similarities!”

7. “My grandmother (1940) and me (2005) — I feel grateful to carry on her lovely genes.”

8. “I think it’s fun to look at my dad at 12 vs me at 12.”

9. “Me vs my mom’s yearbook photo (1977)”

10. “My son at a year old in 2004 and his great-great-grandfather at the same age in 1882”

11. “My whole life people have told me I look just like my mom when she was my age. I never saw it until I found this old picture of my mom.”

12. Nature’s miracles with genes will never cease to amaze us.

13. “My dad and me, both at the age of 14”

14. “Found this old picture of my great-grandma. I was amazed at how much I look like her!”

15. This mom and daughter look almost identical.

16. Seems like sometimes nature works like a 3D printer.

17. This granddaughter has features similar to her grandmother, and they both look so beautiful.

18. “My ancestor from the 1700s next to my dad — apparently my family’s looks haven’t changed much.”

19. “My dad’s mother and me, 70 years apart”

20. This bright smile passed through at least 2 generations.

Bonus: Princess Charlotte and Queen Elizabeth might not look alike, but the princess is surely the queen’s mini-me.

Have you seen this kind of resemblance in real life? Do you know any relatives that look like you?

Preview photo credit JUSTIN TALLIS /AFP / Getty ImagesMax Mumby/Indigo / Getty Images Entertainment / Getty Images

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