Discovering a tick on your dog or livestock, or fleas tormenting your cat, is every pet or livestock owner's worry. These tiny pests are more than just a nuisance—they can cause serious health issues, from tick paralysis to severe skin allergies.

Ticks usually acquire pathogens early in their life (larval or nymphal stages) when they feed on animals. They transmit those pathogens to other animals or to people later in their life (nymphal or adult stages).(1)

But what if there was a natural, effective way to combat these pests without resorting to harsh chemicals? Neem oil, a powerful plant-based remedy, has been used for centuries to repel pests safely—making it a popular choice for pet owners.

Tick Life Cycle and Health Implications

In Australia, the three primary tick species that pose significant concerns for dog owners include the paralysis tick, the bush tick, and the brown dog tick.

Two species of paralysis ticks can infest dogs in Australia; the eastern paralysis tick is found along the east coast from North Queensland to Victoria and is the primary cause of tick paralysis. The southern paralysis tick is found in Tasmania, southern Victoria, and south-east New South Wales.

Ticks go through four stages: egg, larva, nymph, and adult. Except for the egg, each stage needs a blood meal to survive. They locate hosts by sensing breath, body heat, odours, moisture, and vibrations. Their multi-stage life cycle makes them difficult to eliminate, as they thrive in different environments and seek hosts at various times.

Table 1. Tick-Borne Diseases in Australia

Disease

Cause/Carrier

Dogs

Humans


Tick paralysis


Australia paralysis tick (Ixodes holocyclus)


The tick's salivary glands produce a neurotoxin called holocyclotoxin that causes paralysis. 


Dogs and cats are affected, as are sheep, goats, calves, foals, horses, pigs, flying foxes, poultry, and birds (ostrich), reptiles (snakes and lizards), and humans.(2)



Ehrlichiosis


Caused by the tick-borne bacteria Ehrlichia canis, which is carried by brown dog ticks (Rhipicephalus sanguineus). 


Ehrlichiosis primarily infects the cells of the immune system. Infected dogs can show a range of clinical signs, including fever, lethargy, anorexia, and bleeding, or, in some cases, show no signs.


Humans can get ehrlichiosis from the bite of an infected tick. 


Erhlichiosis is a notifiable disease in Australia and must be reported to a Department of Primary Industries and Regional Development (DPIRD) vet.


Anaplasmosis


Anaplasma platys bacteria is transmitted by brown dog ticks. 


Causes a condition in which there is a periodic decrease in platelets. Some dogs may experience bruising or bleeding, including nosebleeds, especially in the early stages of infection when platelet levels are lowest.


Anaplasmosis in cats is quite rare. 


Dogs cannot directly transmit anaplasmosis to humans, but they can carry ticks that transmit the disease. 


Lyme disease


Caused by the bacteria Borrelia burgdorferi, which is spread by the bite of an infected blacklegged tick/deer tick.


There is no evidence that Lyme disease occurs naturally in Australia, but pets and livestock can be infected when they travel from overseas.


Humans can get Lyme disease from the bite of an infected blacklegged tick


Babesiosis


Caused by the protozoan parasite Babesia, which is transmitted by the bite of infected ticks. 


Babesiosis affects a wide range of domestic and wild animals, including cattle, horses, sheep, goats, swine, and cats and dogs.


Can also affect humans.


Bartonellosis


Caused by Bartonella henselae


The prevalence of Bartonella is high within the cat population in Australia. Fleas are considered the primary vector for transmitting Bartonella between cats. 


Can affect both humans and animals. 


Tularemia


Caused by the Francisella tularensis bacteria


A rare disease that can affect pets and livestock in Australia.


Humans can also be infected. 



Fleas

Fleas usually have four steps of development: egg, larva, pupa (which is like a cocoon), and adult. Because of their ability to multiply and infest environments quickly, they become a constant source of concern and annoyance. 

Fleas can cause allergic reactions and skin irritation in pets, especially those sensitive to flea saliva. Flea allergy dermatitis (FAD) is a common condition that leads to intense scratching, hair loss, and hot spots. Even a few flea bites can trigger severe itching, and constant scratching may result in secondary infections.

In addition to skin issues, fleas can transmit tapeworms when pets ingest infected fleas during grooming. Tapeworm larvae develop inside fleas, and once swallowed, they mature into adult tapeworms in the pet’s intestines, causing digestive problems, weight loss, and discomfort.

Signs of a flea infestation include excessive scratching, biting, and licking, along with hair loss, red or irritated skin, and visible fleas or flea dirt in the fur. Flea dirt appears as tiny black specks. Infected pets may also have tapeworm segments in their faeces, resembling rice grains, and affected pets may seem restless due to constant irritation.

Prevention is Key

Knowing the risks of ticks and fleas is important, but prevention is key. The longer an infestation lasts, the harder it is to remove, often spreading in your home. Regular pet and livestock checks, a clean environment, and natural preventatives like neem oil help keep pests away. Routine care is much easier than dealing with an infestation. For the best protection, consult your vet for advice on prevention.

The Natural Solution: Neem Oil 

Neem oil is a vegetable oil extracted from the seeds of the neem tree (Azadirachta indica), a tropical evergreen native to India and nearby regions. Known as "the village pharmacy" in some cultures, this tree has been valued for its medicinal properties for thousands of years. 

Traditionally, neem oil has been used to treat skin conditions, fevers, and as a natural insect repellent for crops and people. It has a strong, distinctive odour, a yellowish-brown colour, and is rich in bioactive compounds—especially azadirachtin, which helps repel insects and disrupt their growth. These properties make neem oil a powerful, natural solution for controlling ticks and fleas.

The Science Behind Neem Oil's Repellent Properties

What makes neem oil so good at keeping bugs away? 

Azadirachtin, the key active compound in Neem oil, works naturally to repel pests. It acts on the insect's hormonal system, hindering their ability to grow, reproduce, and thrive. It's nature's way of keeping pests at bay.

Azadirachtin disrupts the normal lifecycle of insects by mimicking their hormones. It stops the larvae from shedding their skin and moving to the next stage of life, so they can't mature. It also affects their ability to lay eggs, which naturally reduces the number of pests over time.

Neem oil doesn't just stop insects from growing; it also interferes with their feeding behaviour, causing them to lose interest in biting or consuming food. This feature is especially useful in repelling fleas and ticks, as they rely on blood meals to survive.

Neem oil(3) also possesses antifungal, antibacterial, and anti-inflammatory properties, which can be beneficial for skin conditions.

Repelling vs. Killing Insects

It's important to understand that Neem oil primarily repels insects rather than immediately killing them. Think of it as a natural deterrent. Unlike synthetic pesticides that act as instant killers, neem oil disrupts the insect's lifecycle and makes your pet an undesirable host. 

While prolonged exposure to Neem oil can lead to a pest's death, its primary function is prevention. This makes it a gentler, more sustainable option compared to harsh chemical treatments.

Is Neem Oil Safe for Pets?

Neem oil is a powerful natural shield against ticks and fleas, but using it safely is key. It's generally safe for dogs, cats, and livestock when used properly, giving you a chemical-free option. Before using neem soap on pets or livestock, consult your vet, especially if they have health issues. Use high-quality products and follow dilution instructions. Avoid sensitive areas like the eyes, mouth, and genitals. Watch for any reactions and prevent licking or ingestion. Test on a small area first before full use.




Pet Control HQ's Natural Neem Oil Dog Shampoo is more than just a bath; it's a complete skin and coat treatment. This handcrafted, 100% natural shampoo bar cleanses, conditions, and soothes, while naturally repelling ticks and fleas.





References:

1.Tick lifecycles. (2024, October 11). Ticks. https://www.cdc.gov/ticks/about/tick-lifecycles.html

2.Cope, R. B. (2024, September 18). Tick paralysis in animals. MSD Veterinary Manual. https://www.msdvetmanual.com/nervous-system/tick-paralysis/tick-paralysis-in-animals#Etiology-and-Pathogenesis_v3289673

3.Rodrigues, M. P., Astoreca, A. L., Salvato, L. A., Biscoto, G. L., Moura Keller, L. A., Rosa, R., Cavaglieri, L. R., & Keller, K. M. (2019). In Vitro Activity of Neem (Azadirachta indica) Oil on Growth and Ochratoxin A Production by Aspergillus carbonarius Isolates. Toxins, 11(10), 579. https://doi.org/10.3390/toxins11100579

March 09, 2025 — Merliza Cabriles