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Asian Pacific Journal of Tropical Biomedicine 2013年第3期3卷 169-173页

作者： karina mallardo Sandra Nizza Filomena Fiorito Ugo Pagnini Luisa De Martino Department of Pathology and Animal Health Infectious Diseases SectionUniversity of Naples "Federico Ⅱ"

Objective:To investigate the prevalence of methicillin-resistant staphylococci(MRS)which is a potencial risk factor of transmission between animals and humans in different types of horses(harness racing-horses,breeding mares and riding-horses)and to compare the antimicrobial resistance of the ***:A total of 191 healthy horses,housed at different locations of the Campania Region(Italy),were included in the *** swab samples were collected from each nostril of the *** mecA gene was detected by a nested PCR *** susceptibility was tested for each ***:MRS was isolated from nasal samples of 68/191(35.6%;95%CI:28.9%-42.9%)healthy *** isolates were coagulase-negative with the exception of two coagulase-positive MRS strains,identified as Staphylococcus aureus and Staphylococcus pseudintermedius.2/83(2.4%;95%,CI:0.4%-9.2%).Interestingly,both coagulase-positive MRS isolates were from harness *** horses also presented a significantly higher positivity for MRS(53.3%;95%CI:40.1%-66.1%)than the breeding mares and riding-horses *** susceptibility testing showed difference between isolates due to different origins except for an almost common high resistance to aminopenicillins,such as ampicillin and ***:It can be concluded that harness racing-horses may act as a significant reservoir of MRS as compared to breeding mares and riding-horses.

关键词： Methicillin-resistant staphylococci Mares Harness racing-horse Riding-horse Nasal swabs

An update on microbiological causes of canine otitis externa in Campania Region,Italy

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Asian Pacific Journal of Tropical Biomedicine 2016年第5期6卷 384-389页

作者： Luisa De Martino Francesca Paola Nocera karina mallardo Sandra Nizza Eleonora Masturzo Filomena Fiorito Giuseppe Iovane Piergiorgio Catalanotti Department of Veterinary Medicine and Animal Production University of Naples "Federico II" Department of Experimental Medicine Second University of Naples

Objective: To update the recent knowledge of the microbiological causes of canine otitis externa in Campania Region(Italy) and the antibiotic susceptibility patterns of the isolated ***: A total of 122 dogs were examined by otoscopy, and auricular swab samples were collected from both ears in 74 dogs presenting clinical bilateral otitis and from single ears in 48 dogs displaying clinical unilateral otitis. Cytological examination,bacteriological analysis and antimicrobial susceptibility tests were ***: Thirty-one out of 122 dogs were positive for yeast species(25.4%, 95% confidence interval(CI): 18.2%–34.2%) with a higher prevalence of Malassezia pachydermatis(21/31 isolates, 67.7%, CI: 48.5%–82.7%), and a total of 91 out of 122 dogs were positive for bacterial species(74.6%; CI: 65.8%–81.8%) with a higher prevalence of Staphylococcus pseudintermedius(45/143 isolates, 31.5%, CI: 24.1%–39.8%). These results are the first description of Streptococcus agalactiae-associated otitis. The yeasts isolated showed high levels of susceptibility to all antifungal agents tested; on the contrary all the isolated bacterial strains were highly resistant to at least four out of ten antimicrobial classes. Both Gram-positive and Gram-negative bacteria showed high resistance to amoxicillin/clavulanate and kanamycin hence they are not recommended as initial empirical therapy for the otitis ***: This update illustrates an increase in antibiotic resistances providing an insight into the current knowledge of the therapeutic procedures followed on canine otitis externa in Italy. It also emphasizes the importance of considering the results of the microbiological and sensitivity tests to decide on an appropriate antibiotic therapy.

关键词： Canine otitis externa Malassezia pachydermatis Staphylococcus pseudintermedius Antimicrobial resistance

Conjunctival cytological examination,bacteriological culture,and antimicrobial resistance profiles of healthy Mediterranean buffaloes(Bubalus bubalis) from Southern Italy

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Asian Pacific Journal of Tropical Biomedicine 2015年第11期5卷 889-895页

作者： Barbara Lamagna Maria Pia Pasolini Sandra Nizza karina mallardo Maurizio Formicola Alessandro Costagliola Gerardo Fatone Filomena Fiorito Orlando Paciello Luisa De Martino Department of Veterinary Medicine and Animal Production University of Naples Federico II

Objective: To assess normal conjunctival cytological and bacteriological/fungal flora features in the Mediterranean buffalo(Bubalus bubalis).Methods: Swabs were taken from the inferior conjunctival sac of both eyes of 57 healthy female buffaloes aged 24–36 months, with no evidence of ocular disease, farmed in Campania region(Southern Italy), for microbiological analysis. Conjunctival eye specimens of both eyes were subsequently obtained by a cyto-brush, for cytological *** antimicrobial susceptibility of bacterial isolates was also determined using the diskdiffusion method on Mueller Hinton agar ***: Cytological examination of conjunctival swab specimens(114 eyes) revealed epithelial cells(basal, intermediate, columnar and super ficial) in all samples, whereas neutrophils, lymphocytes and plasma cells were present in 70%, 10% and 2% of samples,respectively. Microorganisms, for a total of 261 aerobic bacteria and 6 fungi, were isolated from 112/114 conjunctival samples [98.25%; 95% con fidence interval(CI): 93.18–99.70]. Only two conjunctival swabs did not yield bacteria and/or fungi(2/114, 1.75%;95% CI: 0.30–6.82). Gram-positive aerobes were most commonly cultured(181/261,69.35%; 95% CI: 63.31–74.81), with Enterococcus faecium and Staphylococcus lentus predominating. Escherichia coli was the most frequently isolated as Gram-negative bacteria(80/261, 30.65%; 95% CI: 25.19–36.69). The antimicrobial resistance patterns of the isolated bacteria showed amoxycillin/clavulanic acid and cephalothin as the least sensitive antibiotics for both Gram-positive and Gram-negative ***: These results provided first information on normal conjunctival ocular micro flora and cytological features in Mediterranean buffalo.

关键词： Mediterranean buffalo Conjunctival cytological exa

Penicillin-Resistant <i>Aerococcus viridans</i>Bacteremia Associated with Bovine Severe Respiratory Syndrome

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Open Journal of Veterinary Medicine 2013年第2期3卷 131-135页

作者： Jacopo Guccione Sandra Nizza karina mallardo Antonietta Cantiello Filomena Fiorito Antonio Di Loria Luisa De Martino Department of Pathology and Animal Health Infectious Diseases Section Faculty of Veterinary Medicine University of Naples “Federico II” Naples Italy

Aerococcus viridans, a less frequently isolated bacteria, is a gram-positive, catalase-negative coccus, found singly or in tetrads, with biochemical and growth characteristics of streptococci and enterococci. This microorganism, usually susceptible to penicillin, is often found in the environment and is infrequently associated with human/veterinary infections. We described a case of Holstein Friesian female calf, 150-day-old, affected by respiratory emergencies. Following the clinical signs, radiographic analysis and bacteriological/molecular examinations carried out on blood culture, a diagnosis of severe broncho-pulmonary disease associate with a multidrug-resistant A. viridans bacteremia was done. The present case highlights the invasive nature of a saprophytic bacterium showing a broad profile of antibiotic-resistance including β-lactams. Furthermore, this report confirms that the effectiveness of an antibiotic therapy is based primarily on a sure diagnosis including susceptibility testing.

关键词： Respiratory Syndrome Aerococcus viridans Antibiotic-Resistance