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Many Mycoplasma species are involved in caprine and ovine pneumonia all over the world causing serious economic losses. These species have been reported as a cause of pneumonia, mastitis, arthritis, conjunctivitis and genital infection. The detection of Mycoplasma species in the respiratory system of sheep and goat was the objective of the present study. So, a total of 400 samples (250 from sheep and 150 from goat) were examined bacteriologically, biochemically; PCR, and by sequencing; in addition to the antibiotic susceptibility profiles screening. Only 13 isolates could be identified as Mycoplasma species. One of these sequences was submitted to the Genbank taking the accession number MK910041; Mycoplasma species 'ovine/caprine serogroup 11'. Only 7 isolates were weak biofilm producer and the other 6 isolates were non biofilm producers; 8 isolates were positive for catalase test and 5 were negative. H2S production was recorded in 10 isolates; hemolysis was detected in only 6 isolates. In addition, the minimum inhibitory concentrations (MICs) for seven antimicrobial agents, including danofloxacin, tulathromycin, tylosin, streptomycin, lincomycin, florfenicol and oxytetracycline were determined. All the isolates (100%) were sensitive to tulathromycin and tylosin, streptomycin and oxytetracycline, 38.5% of them were sensitive to danofloxacin and 69.2% were sensitive to florfenicol while 69.2% of isolates were resistant to lincomycin. As all the isolates were recovered from apparently healthy as well as clinically diseased animals and identified as untyped Mycoplasma species, So, more investigations will be done to full identify these isolates and discover their roles in infection.

Background Staphylococcus epidermidis has emerged as an often encountered pathogen responsible for hospital-acquired infections. The aim of present study is to investigate the microbiological characteristic of S. epidermidis isolates isolated from sterile specimens and skin in a Chinese tertiary hospital. Methods A total of 223 non-duplicate S. epidermidis were collected from various sterile specimens of inpatients among 10 years in Wenzhou, China. 106 S. epidermidis obtained from the skin (urethral orifices) of healthy volunteers. All isolates were tested for antimicrobial susceptibility. PCR was used to detect the virulence- and resistance-associated genes and 7 housekeeping genes to determine the sequence types (STs) of selected isolates. Results The resistance rates to antimicrobials tested except linezolid and vancomycin and the prevalence of methicillin-resistant S. epidermidis (MRSE) of S. epidermidis clinical isolates were significantly higher than those among colonized isolates (P 90%), which was similar to the characteristics of ST59 clone with one locus difference from ST466. ST466 clone competence with Staphylococcus aureus was relatively stronger, relative to ST2, ST20, ST130 and ST59 clones. Conclusion Taken together, a high-level of genetic diversity was found between clinical and colonized S. epidermidis isolates. A novel ST466 clone with distinct and similar characteristics relative to other prevalent clones, emerging as a prevalent clone in China, should be of major concern. Electronic supplementary material The online version of this article (10.1186/s12866-019-1523-6) contains supplementary material, which is available to authorized users.