Comparative investigation of bacterial and fungal infections causes of otitis in dogs and cats of a certain breed

Subject Areas : Mycology

majid  sadeghpour ¹ (Senior expert in microbiology, member of the Scientific Association of Microbiology of Iran, Tehran, Iran)
Ehsan  stabraghi ² (Assistant Professor, Department of Veterinary Medicine, Faculty of Veterinary Medicine, Islamic Azad University, Shahrbabak Branch, Shahrbabak, Iran.)
Farzaneh  Tajdini ³ (Assistant Professor, Department of Microbiology, Faculty of Veterinary Medicine, Karaj Branch, Islamic Azad University, Karaj, Iran)
tayeb  Seyyed Hosseini Purizdi ⁴ (General PhD student, Department of Veterinary Medicine, Faculty of Veterinary Medicine, Baft Unit, Islamic Azad University, Baft, Iran.)
Narges  Pashmi ⁵ (General PhD student, Department of Veterinary Medicine, Faculty of Veterinary Medicine, Karaj Branch, Islamic Azad University, Karaj, Iran.)

Received: 2023-08-14 Accepted : 2024-05-23 Published : 2024-05-23

Keywords: dog ear, cat ear, otitis, fungal flora, otitis,

Abstract :

External otitis means swelling and inflammation of the outer ear canal. Following swelling and inflammation of the outer ear, the natural area of the duct changes. Clinical signs are more indicative of an infection in the middle ear. These symptoms in the middle area of the ear, especially in cats, are often clinical or mild, but in dogs, they are more likely to indicate simultaneous external otitis. Bacteria and fungi can grow too much in the ear and cause infections. Many fungal pathogens cause opportunistic ear infections and cause severe fungal infections of the ear in animals and cause numerous disorders. The study was conducted on 30 dog collars and 30 cat collars of different ages, genders and breeds. Samples isolated from dog and cat ear discharges were sent to the lab to identify pathogens. The samples were randomly collected from Tehran's Avina Veterinary Hospital. how to collect the sample; After attenuation, the sampling was done with a sterile swab of ear secretions of dogs and cats, then put the swab into a sterile tube، Samples were immediately sent to the laboratory. Bacterial study of animal-derived swabs was cultivated in the base environment of blood agar and agar neutrinos. In order to identify and isolate mushrooms, a surface culture method was used in the sabro dextrose environment of agar. According to this study, among different breeds in dogs, the highest abundance of bacteria and fungi was observed in the native and Malinois breed and in cats with short street hair breed (DSH). The results of this study include bacteria isolated from dog ear discharge: Bacillus cereus 6 cases (20%), Staphylococcus aureus 4 cases (33/13%), Staphylococcus saprophyticus 3 cases (10%), Staphylococcus saprophyticus3 (10%), Staphylococcus epidermidis 2 (66/6%), Pseudomonas 2 (66/6%) and Bacillus 2 (66/6%), isolated bacteria cat ear secretions include: Staphylococcus aureus 3 (10%), Staphylococcus epidermidis 9 (30%), Entrobacter aerogenes 4 (33/13%) and E. coli 4 (33/13%), Fungal isolated from dogs include penicillium 2 (33/13%), Rodoterola 4 (33/13%), Geotericum 3 (10%), Alternators 2 (66/6%), Alocladium 2 (66/6%), Penicillium (6.66%), Aspergillus (66/6%)، Cladosporium 2 (66/6%) and in cat ear discharge Aspergillus fungus 8 (66/26%), Penicillium 3 (10%), Rhodotrola 2 (66/6%), Geotericum 1 (33/3%). According to past studies and current research, external otitis is an acute or chronic inflammation of the outer ear that occurs more frequently in dogs than cats, and especially dogs with longer hanging ears They are more influenced by external otitis.