"Discover comprehensive insights into Avian Mycoplasmosis with our expert notes. Learn about its causes, symptoms, and effective management strategies to enhance your poultry health expertise."
Dr. Muhammad Kashif Saleemi
DVM, M.Sc (Hons.), PhD
Associate Professor (Tenured)
Member National Disease Control Committee (NDCC)
US-NAS One Health Fellowship
Head Diagnostic Laboratory Department of Pathology
Department of Pathology, Faculty of Veterinary Science,
University of Agriculture, Faisalabad, Pakistan
, Definition and Occurrence
◼ Mycoplasmas belong to the Order Mycoplasmatales, are
the smallest prokaryotic organism (DNA content)
cultivatable on artificial medium and are completely devoid
of a cell wall.
◼ The absence of a cell wall accounts for their pleomorphic
shape, fried-egg colony appearance and their resistance
to penicillin-like antibiotics
◼ More than 20 species have identified, Four mycoplasma
species are considered pathogenic to commercial poultry
◼ Mycoplasma gallisepticum, M. synoviae, M. meleagridis
and M. iowae.
◼ Pathogenic species generally infect the respiratory system
but other systems may also be involved.
, Definition and Occurrence
◼ The cultivation of Mycoplasma sp. is somewhat difficult
and requires specialized media containing 10–15% serum,
yeast-derived components and unique factors for certain
species.
◼ Colony morphology is variable but it is characterized by a
“fried-egg” appearance.
◼ Identification to the species level is usually based on
immunologic tests utilizing species-specific antisera or
amplified DNA type tests
◼ Inoculation of 5-7 day-old embryos is an alternative
isolation procedure utilized (artificial media is unrewarding)
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