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  • Title: Molecular Identification of Mycoplasma agalactiae in Iran Based on P30 Gene.
    Author: Babazadeh M, Pourbakhsh SA, Noormohammadi Z, Esmaelizad M, Goudarzi H.
    Journal: Arch Razi Inst; 2021 Mar; 76(1):61-68. PubMed ID: 33818958.
    Abstract:
    Mycoplasma agalactiae (M. agalactiae) is known as the main etiological agent of contagious agalactia (CA). The CA is a disease affecting dairy sheep and goats, the main characteristics of which include keratoconjunctivitis, arthritis, and mastitis. This pathogen results in milk production reduction and suppression, thereby leading to serious economic loss. In the present study, 125 sheep and goat samples were collected from 15 provinces of Iran. Cultural and molecular methods were used for sample characterization. After extracting genomic DNAs using the phenol/chloroform method, the PCR technique was employed to detect Mycoplasma genus in 163bp fragment of 16S rRNA gene (M-PCR) and M. agalactiae in 800bp fragment of conserve and specific P30 lipoprotein gene (P30-PCR) in cultural and clinical samples. Finally, to validate the experimental approach, a 375 bp amplicon of P80 lipoprotein was amplified using the MA-PCR. Out of 125 samples under investigation, 43 cases were positive, and Mycoplasma colonies were observed in the pleuropneumonia-like organisms agar culture. Based on the results of the M-PCR method, 61 specimens (out of 125 samples) were scored positive for Mycoplasma presence. Furthermore, 20 samples were positive according to the P30-PCR data. It should be mentioned that the MA-PCR was performed based on the P80 gene on 125 total samples to furtherverify the results for M.agalactiae detection. Based on the obtained data, P30 and P80 genes were presented and amplified in all Iranian M. agalactiae isolates (n=20). Our results indicated that the P30 gene was conserved and specific to all Iranian M. agalactiae isolates and this new P30-PCR method (as an MA-PCR technique) might be useful in the detection of this pathogen.
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