Bordetellosis is a contagious bacterial disease of cats that primarily causes upper respiratory tract abnormalities. Easily spread in kennels, bordetellosis is most severe in young kittens (less than six weeks old) and in kittens living in less than ideal hygienic conditions. However, any cat with a pre-existing airway disease (e.g., feline herpesvirus and calicivirus infections) is susceptible to Bordetellosis, no matter how old it is.

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This infectious disease is caused by a gram positive, pleomorphic (can change shape somewhat between a rod and coccus), rod-shaped bacteria of the genus Actinomyces, most commonly the A. viscosus species. Able to survive with little (microaerophilic) or no oxygen (anaerobic), Actinomyces is rarely found as the single bacterial agent in a lesion. It more often a component of a polymicrobial infection with several bacteria present. In fact, there may even be synergism between Actinomyces and other organisms.

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Babesiosis is the diseased state caused by the protozoal (single celled) parasites of the genus Babesia. The most common mode of transmission is by tick bite, as the Babesia parasite uses the tick as a reservoir to reach host mammals. Infection in a cat may occur by tick transmission, direct transmission via blood transfer from dog or cat bites, blood transfusions, or transplacental transmission. The incubation period averages about two weeks, but symptoms may remain mild and some cases are not diagnosed for months to years. Piroplasms infect and replicate in the red blood cells, resulting in both direct and immune-mediated hemolytic anemia, where the red blood cells (RBCs) are broken down through hemolysis (destruction) and hemoglobin is released into the body. This release of hemoglobin can lead to jaundice, and to anemia when the body cannot produce enough new red blood cells to replace the ones being destroyed. Immune-mediated hemolytic anemia is likely to be more clinically important than parasite-induced RBC destruction, since the severity of the condition does not depend on the degree of parasitemia.

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Uremia, meanwhile, also leads to an accumulation of waste products in the blood, but is due to improper excretion of the waste products through the urine because of abnormal kidney function.

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Narcolepsy and cataplexy, disorders that affect the way an animal is able to physically operate, are rare but well studied disorders of the nervous system. Narcolepsy is symptomized by excessive daytime sleepiness, lack of energy, and brief losses of consciousness. The episodes are typically brief and go away by themselves. Cataplexy is characterized by sudden muscle weakness and paralysis without loss of consciousness. A cat that is affected by cataplexy will remain alert and capable of following movement with its eyes throughout the episode. Cataplexy is similar to narcolepsy in that the episodes are spontaneous, brief, and reversible. Individuals may be affected with one, or both of these disorders.

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Bartonellosis is an infectious bacterial disease, caused by the gram-negative bacteria Bartonella henselae. It is also commonly known as cat scratch disease (CSD), or “cat scratch fever.”

This is a zoonotic disease, meaning that it can be transmitted between animals and humans. In cats, the disease is generally transmitted through contact with flea feces. The bacterium is excreted through the flea and into its feces, which it leaves on the cat’s skin. The cat, through grooming itself, ingests the bacteria, thereby becoming infected with the Bartonella strain. Humans do not acquire this infection from flea reservoirs. It is important to note that this bacterial infection can also be transmitted to humans and cats by ticks.

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Any variation from normal tooth color is considered discoloration. However, the normal color of teeth varies, dependent on the shade, thickness, and translucency of the enamel covering the tooth.

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Much like in humans, a blockage of blood flow to the myocardium (the heart’s muscular wall), is medically referred to as a heart attack, or myocardial infarction. This is generally due to the formation of a blood clot (or thrombus) within the blood vessels or heart, causing the premature death of a portion of the myocardium.

Heart attacks are rare in both cats and dogs.

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The pseudorabies virus infection (or Aujeszky’s disease) is an uncommon but highly fatal disease found in cats, especially those that come into contact with swine. Unfortunately, many cats infected with this virus die suddenly, often without characteristic signs.

When symptoms do occur, they include excessive salivation, intense itching, and neurologic behavioral changes. Because of the extreme itching it causes, pseudorabies is sometimes referred to as “mad itch.”

The virus infects both dogs and cats — primarily those living on farms — as well as other domestic animals such as swine, cattle, sheep, and goats. Otherwise, there is no breed, gender, or age predilection for this viral infection.

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The abdominal cavity is lined with a thin, watery membrane, called the peritoneum. When the cat’s abdominal cavity, also called the peritoneal cavity, is injured, the peritoneum becomes inflamed. The severity of the inflammation depends on the type of injury the peritoneal cavity has undergone. Peritonitis is frequently a painful condition, and the cat will respond when it is touched on its abdomen.

Peritonitis can affect both dogs and cats. To learn more about how it affects dogs, please visit this page in the PetMD health library.

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