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Feline Health Care

Vaccinations and Deworming

Parasite Treatment and Prevention

(under construction)

Fleas, ticks, mosquitoes, roundworm, hookworms, etc. Some insecticides absorb into the bloodstream and also act as dewormers.
Small Animal Toxicoses - Insecticides by Tina Wismer, DVM, Veterinary Poison Information Specialist, ASPCA Animal Poison Control Center


“ As all macrocyclic lactones, selamectin acts as agonist of the GABA (gamma-aminobutyric acid) neurotransmitter in nerve cells and also binds to glutamate-gated chloride channels in nerve and muscle cells of invertebrates. In both cases it blocks the transmission of neuronal signals of the parasites, which are paralyzed and expelled out of the body, or they starve. It also affects the reproduction of some parasites by diminishing oviposition or inducing an abnormal oogenesis.

In mammals the GABA receptors occur only in the central nervous system (CNS), i.e. in the brain and the spinal chord. But mammals have a so-called blood-brain barrier that prevents microscopic objects and large molecules to get into the brain. Consequently macrocyclic lactones are much less toxic to mammals than to parasites without such a barrier, which allows quite high safety margins for use on livestock and pets. A notable exception to this are dog breeds that carry the MDR-1 gene defect (see later). ” Parasitipedia mentions studies without providing any reference, but I believe they are referring to studies with conflicts of interest.

Further reading: Kirk's Current Veterinary Therapy XV, chapter 34, Avermectins in Dermatology

Studies with Conflicts of Interest

Efficacy and safety of a new spot-on formulation of selamectin plus sarolaner..., 2017
Paid for and carried out by employees of Zoetis, which produce Revolution.

Safety of selamectin in cats, 2000
The study was headed by Pfizer, which used to be the parent company of Zoetis at the time of the study.

Selamectin: a novel broad-spectrum endectocide for dogs and cats, 2000
The study was headed by Pfizer, which used to be the parent company of Zoetis at the time of the study.

Toxicology Studies

Effects of Neonicotinoid Pesticide Exposure on Human Health: A Systematic Review, 2017
“The studies conducted to date were limited in number with suggestive but methodologically weak findings related to chronic exposure. Given the wide-scale use of neonics, more studies are needed to fully understand their effects on human health.”

Human Exposure to Selamectin from Dogs Treated with Revolution™: Methodological Consideration for Selamectin Isolation, 2004
“It needs to be mentioned that selamectin has the potential to bio-concentrate, and therefore, its long-term repeated exposure may pose adverse health risks to veterinarians and their personnel and pet owners.”



Fipronil vs Selamectin


It's important to trim your cats claws, as breaks in the skin are more susceptible to infection. Kittens playing with each other can spread the fungus through their claws.


A blacklight can be used to detect the most common form of ringworm. From Wikipedia: “A blacklight (or often black light), also referred to as a UV-A light, Wood's lamp, or ultraviolet light, is a lamp that emits long-wave (UV-A) ultraviolet light and very little visible light.”

When shining a blacklight at a cat, “If the hairs fluoresce a lime green, it is a type of ringworm fungus on the coat. Works for cats or dogs. But the problem can still be ringworm if it doesn’t fluoresce, because there are several species of fungi that cause ringworm and only one of them fluoresces. Purple or white ‘flourescence’ or flakes or skin that fluoresces don’t count: it has to be the green and it has to be the hair shafts.” Andie Lenhard, Veternarian


Hoping ACV would be effective, I searched for scientific literature with the terms: “dermatophytosis” “acetic acid” “feline”

Muller and Kirk's Small Animal Dermatology p.223 alternate view

Products for Topical Treatment of Fungal Infections “ Topical Therapies

Topical Therapy is often curative in superficial yeast infections (Malassezia, Candida) and may be curative or adjunctive in dermatophytosis. Dermatophyte infections are more difficult to treat because the fungi are relatively protected within hair shafts and hair follicles. Topical antifungal agents kill unprotected dermatophyte hyphae and spores rapidly, but not hyphae and spores within hairs. Topical agents tend to be more effective in short coated animals, for localized alopecic lesions, and in long-haired anials that have been clipped. Many topical antifungal agents are primarily of historical interest and are not discussed in this text. Examples of such products include povidone-iodine, sodium hypochlorite, tolnaftate, Whitfield's ointment (benzoic and salicylic acids), gentian violet, potassium permanganate, and so forth. The interested reader is referred to previous editions of this book.

Spot Treatments

Focal applications of topical antifungal agents are useful for treatment of candidiasis, Malassezia dermatitis, and localized dermatophyte lesions in dogs and shorthaired cats. …Products containing chlorhexidine in combination with miconazole may be more effective than either agent used alone. [ Spot treatments work best around the head and neck, where cats don't have direct grooming access. ]


Antifungal rinses are the most effective topical products for treatment of widespread superficial mycoses. They have more residual activity than shampoos. … Lime Sulfur is typically applied once or twice weekly for Malassezia dermatitis and every 5 to 7 days for dermatophytosis. Miconazole/chlorhexidine and enilconazole rinses may also be applied once or twice weekly. Another useful rinse for the treatment of Malassezia dermatitis is acetic acid 2.5%. The solution can be prepared by combining equal parts vinegar (5% acetic acid) and water. The solution is well tolerated and particularly useful as a foot soak (5-10 minutes daily) for Malassezia pododermatitis. ”

Systemic Therapies

I'd rather not give a cat medication, because of the side effects. However, the best tolerated one (also recommended by kitten lady) is itraconazole (brand name: itrafungol).

Natural Dermal Treatments

Apple Cider Vinegar

One possible treatment for an ear infection is ACV apple cider vinegar. The paper I found stated “clear distilled malt vinegar” (aka acetic acid) at a ratio of 1:1 with water, in cases of antibiotic resistance. 1)

Aloe Vera Gel

While the plant is toxic to cats, the gel itself is not. 2) Maybe it can be beneficial as it is for human skin? I found some studies of the extract of aloe vera, but I'm not sure this is quite the same as aloe gel/juice. Search terms used were “aloe barbadensis dermatophytosis”.

One article was for aloe vera juice. It was found to inhibit growth of different species of dermatophytes in agar gel. 3)

The other was for fresh aloe straight from the plant: “Faster cure of the Ring worm was achieved with the fresh sample treatment than was recorded for the fermented Aloe vera treatment.” 4)

I am trying this treatment first, because the kitten seems to tolerate it well, and even likes it as I massage him with my fingers. Perhaps he sees that I use it on myself as well, so it's a grown up thing to do. This is in contrast to Conzol 1% (miconazole nitrate) lotion, which he complains bitterly when I apply, also using my fingers.

I don't see the rave in using other products, considering that in healthy cats, ringworm resolves by itself in 70-100 days. If using pharma or lime-sulfur the issue resolves in 60 days, is that such a big difference?


The first day on the June 23, I used the miconazole nitrate. After that, I've been using aloe vera on subsequent days, once a day, until today July 4th, 11 days later. His hair is really smooth. His condition isn't resolved, but much improved. I can no longer see the bald spots on his head or feel the scaly spots that were around his neck. Some former spots have disappeared. His ears still have uneven hair.

Under the blacklight, I can see some regions that are still infected, but the hair has started growing back. The ears show a trace amount of infection, where before there were dense patches of luminescence.

Vomiting vs Regurgitation

1) Use and abuse of topical dermatological therapy in dogs and cats. Part 2, CATHY CURTIS
3) Susceptibility of dermatophytes to Aloe vera juices using agar
4) Control of Tinea (ringworm) using Aloe vera gel in Rivers State.


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feline/health-care.txt · Last modified: 2020/07/05 02:38 by marcos