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1. Strategies for preventing group B streptococcal infections in newborns: A nation-wide survey of Italian policies

Author

Tzialla, C, berardi, A, farina, C, clerici, P, borghesi, A, viora, E, scollo, P, stronati, M, Task Force for group B streptococcal infections for the Italian Society of Neonatology including Stival, G, barbaglia, Ma, guala, A, giunta, E, parola, L, grossignani, Mr, perri, P, tubaldi, L, alletto, G, daidone, S, flacco, V, dani, C, sterpa, A, rapisardi, G, elicio, Mr, faldella, G, capretti, Mg, messner, H, bandiera, M, achille, C, azzali, A, montrasio, G, mariani, S, galvagno, G, giacosa, E, de Angelis, F, spandrio, M, serra, A, garofalo, F, perona, A, porcelli, F, ferrero, F, De Franco, S, paollilo, P, picone, S, besana, R, varisco, T, farina, M, memo, L, nicolini, G, lietti, D, Di Chiara, G, rottoli, A, Bonabitacola, T, Cortis, E, Neri, E, Martinelli, S, Ilardi, L, Rondanini, Gf, Calzi, P, Gatta, A, Quntadamo, Pa, Ivaldi, M, Terenzani, L, Di Lascio, N, Travaglio, Md, Vetrano, G, Furcolo, G, Vitacco, V, Intini, C, Frigerio, M, Stroppiana, P, Policicchio, G, Mesirca, P, Gianino, P, Audenio, E, Paludetto, R, Raimondi, F, Pugliese, A, Valentino, L, Nosari, N, Marchesano, G, Chirico, G, Bellù, R, Menchini, M, Poletti, A, E T, Vacchiano, Pinto, L, E D, Perri, Coppola, R, Perini, R, Vetrella, A, De Luca, G, Lista, G, Cavigioli, F, Bettinelli, A, Massironi, E, Franco, C, Bernardo, L, Poli, S, Palladini, M, Tota, V, Spadavecchia, F, Zuccotti, Gv, Pogliani, L, Bracaglia, G, Mancini, Al, Zocco, F, Iozzia, G, Auriemma, A, Teani, M, Mangilli, G, Tempra, Am, Di Terlizi, L, Bottino, R, Salvi, C, Fortunato, V, Musaico, R, Gargantini, G, Carrera, G, Magaldi, R, Taurino, L, D'Onofrio, Am, Buffone, E, Tempera, A, Agosti, M, Garzia, P, Mosca, F, Pugni, L, Tagliabue, P, Colombo, C, Demi, M, Picco, G, Carlucci, A, Zorzi, G, Padula, D, Cardone, Ml, Buonocore, G, Muraca, Mc, Boldrini, A, Ciantelli, M, Lanari, M, Serra, L, Felici, L, Banderalli, G, Brambilla, C, Dall'Agnola, A, Viviani, E, Zonca, Mc, Licardi, G, Chiara, A, Ancora, G, Papa, I, Gancia, P, Pomero, G, Deloglu, A, Villani, P, Mussini, P, Canidio, E, Migliavacca, D, Di Fabio, S, Cipollone, I, Biasucci, G, Rubbi, P, Piepoli, M, Guastaferro, N, Infriccioli, F, Bertino, E, Perathoner, C, Parmigiani, S, Suriano, G, Ianniello, C, Biasini, A, Azzalli, M, Timpani, G, Barresi, S, Caoci, G, Ciccotti, R, De Curtis, M, Natale, F, Finocchi, M, Haass, C, Milillo, F, Lucieri, S, Guercio, E, Canepa, Sa, Scozia, G, Antonucci, R, Limongelli, O, Macciò, S, Mongelli, F, Colonna, F, Dragovic, D, Calipa, Mt, Cohen, A, Moresco, L, Italian Society of Obstetricians and Gynecologists including La Spina, R, Ruggeri, R, Luehwink, A, Brattoli, M, Fedi, A, Lacchi, L, Ettore, G, Pappalardo, E, Conoscenti, G, Zeni, B, Spellecchia, D, Favretti, L, Spagna, L, Zaglio, S, Bresciani, D, Bandini, A, Mancini, R, Mustoni, P, Dodero, D, Grimaldi, M, Di Mario, M, Migliorini, P, Kemeny, A, Anastasio, Ps, Riccardi, T, Maggino, T, Cerri, G, Puggina, P, Marconi, Am, Morgia, S, Bellia, G, D'Anna, Mr, Catania, M, Bacchi Modena, A, Franchi, L, Calonaci, N, Schettini, S, Paradiso, R, Saccucci, P, Ioppi, M, Zorzi, M, Stellin, G, Patacchiola, F, Carrata, L, Bassini, D, San Marco, L, Todros, T, Tibadi, C, Liborio, M, Italian Association of Clinical Microbiologists including Laricchia, R, Tauro, L, Ferrara, F, Nuara, C, Ghiraldi, E, Molinari, F, Comessatti, A, Rocchetti, A, Di Matteo, L, Miconi, V, Calvi, P, Pernigotti, A, Fabozzi, F, Micca, G, Monticone, G, Sarti, M, Da Rin, G, Zoppelletto, M, Modolo, E, Landini, Mp, Furlini, G, Galluppi, E, Pagani, E, Aschbacher, R, Innocenti, P, Bresolin, N, Raggi, Me, Bonfanti, C, De Francesco, M, Santer, P, Griessmaier, A, De Francesco, D, Pirali, A, Prasciolu, C, Usai, F, Cuzzone, G, Scutellà, M, Tramacere, P, Fossati, D, Piaserico, G, Bordignon, G, Sciacca, A, Di Vincenzo, F, Imbriani, A, Melotti, D, Catanoso, G, Rivetti, I, Neri, G, Bruno, R, Bacelle, L, Sartore, P, Giana, G, Sala, E, Giraldi, C, Cavalcanti, P, Perugini, M, Perugini, A, Ginardi, C, Maritano, D, Ferrini, A, Bonettini, A, Avanzini, A, Gasperoni, S, Pieretti, B, Montanari, E, Carillo, C, Rossi, Mr, Laureti, A, Baldoni, Ml, Serra, D, Melioli, G, Bandettini, R, Oneto, F, Colla, R, Storchi Incerti, S, Lanzini, F, Pauri, P, Tili, E, Leone, Ra, Verdastro, G, Megha, M, Luzzaro, F, Conti, A, Busulini, L, Mirri, P, Diodati, R, Vettori, C, Pittalis, S, Anesi, A, Fiore, A, Goglia, L, Vitullo, E, Sinno, A, Platzgummer, S, Spitaler, C, Trabucchi, Mc, Besozzi, M, Cesana, E, Inghilleri, G, Grosso, S, D'Angelo, R, Fogato, E, Lavarda, F, Ortisi, G, Clementi, M, Cichero, P, Rumpianesi, F, Venturelli, C, Mortillaro, F, Daffara, S, Catania, Mr, Iula, D, Andreoni, S, Politi, A, Agostinelli, C, Paparella, C, Capozzi, D, Notaris, P, Bistoni, F, Mencacci, A, Valentini, M, Filippetti, A, Confalonieri, M, Novarese, O, Bonini, F, Salamone, D, Camporese, A, De Rosa, R, Casprini, P, Degl'Innocenti, R, Giordano, R, Allù, Mt, Zanella, D, Malandrino, M, Tronci, M, Valmarin, M, Leonetti, G, Falco, S, Meledandri, M, Ballardini, M, Spanò, A, Cava, Mc, Mascellino, Mt, Schinella, M, Gualdi, P, Casari, E, Scattolo, N, Motta, C, Perfetti, C, Bassano, M, Cera, G, Iafisco, P, Mura, I, Palmieri, A, Migliardi, M, Ferlini, M, Grandi, G, Giardini, F, Albano, F, Latino, M, Ferrero, Mp, Bellizia, L, Russolo, M, Russolo, S, Pesenti, A, Fasano, Ma, Previato, S, Radillo, O, Busetti, M, Ferrari, P, Siderini, V, Puzzolante, L, Scarparo, C, Arzese, A, Cappuccia, N, Lodolo, L, Delledonne, L, Gramoni, A, Maiolo, V, Gheller, A, Spadaro, S, Balzaretti, M, Tzialla, C., Berardi, A., Farina, C., Clerici, P., Borghesi, A., Viora, E., Scollo, P., Stronati, M., Stival, G., Barbaglia, M. A., Guala, A., Giunta, E., Parola, L., Grossignani, M. R., Perri, P., Tubaldi, L., Alletto, G., Daidone, S., Flacco, V., Dani, C., Sterpa, A., Rapisardi, G., Elicio, M. R., Faldella, G., Capretti, M. G., Messner, H., Bandiera, M., Achille, C., Azzali, A., Montrasio, G., Mariani, S., Galvagno, G., Giacosa, E., de Angelis, F., Spandrio, M., Serra, A., Garofalo, F., Perona, A., Porcelli, F., Ferrero, F., De Franco, S., Paollilo, P., Picone, S., Besana, R., Varisco, T., Farina, M., Memo, L., Nicolini, G., Lietti, D., Di Chiara, G., Rottoli, A., Bonabitacola, T., Cortis, E., Neri, E., Martinelli, S., Ilardi, L., Rondanini, G. F., Calzi, P., Gatta, A., Quntadamo, P. A., Ivaldi, M., Terenzani, L., Di Lascio, N., Travaglio, M. D., Vetrano, G., Furcolo, G., Vitacco, V., Intini, C., Frigerio, M., Stroppiana, P., Policicchio, G., Mesirca, P., Gianino, P., Audenio, E., Paludetto, R., Raimondi, F., Pugliese, A., Valentino, L., Nosari, N., Marchesano, G., Chirico, G., Bell(`u), R., Menchini, M., Poletti, A., Vacchiano, T., Pinto, L., Perri, D., Coppola, R., Perini, R., Vetrella, A., De Luca, G., Lista, G., Cavigioli, F., Bettinelli, A., Massironi, E., Franco, C., Bernardo, L., Poli, S., Palladini, M., Tota, V., Spadavecchia, F., Zuccotti, G. V., Pogliani, L., Bracaglia, G., Mancini, A. L., Zocco, F., Iozzia, G., Auriemma, A., Teani, M., Mangilli, G., Tempra, A. M., Di Terlizi, L., Bottino, R., Salvi, C., Fortunato, V., Musaico, R., Gargantini, G., Carrera, G., Magaldi, R., Taurino, L., D?onofrio, A. M., Buffone, E., Tempera, A., Agosti, M., Garzia, P., Mosca, F., Pugni, L., Tagliabue, P., Colombo, C., Demi, M., Picco, G., Carlucci, A., Zorzi, G., Padula, D., Cardone, M. L., Buonocore, G., Muraca, M. C., Boldrini, A., Ciantelli, M., Lanari, M., Serra, L., Felici, L., Banderalli, G., Brambilla, C., Dall?agnola, A., Viviani, E., Zonca, M. C., Licardi, G., Chiara, A., Ancora, G., Papa, I., Gancia, P., Pomero, G., Deloglu, A., Villani, P., Mussini, P., Canidio, E., Migliavacca, D., Di Fabio, S., Cipollone, I., Biasucci, G., Rubbi, P., Piepoli, M., Guastaferro, N., Infriccioli, F., Bertino, E., Perathoner, C., Parmigiani, S., Suriano, G., Ianniello, C., Biasini, A., Azzalli, M., Timpani, G., Barresi, S., Caoci, G., Ciccotti, R., De Curtis, M., Natale, F., Finocchi, M., Haass, C., Milillo, F., Lucieri, S., Guercio, E., Canepa, S. A., Scozia, G., Antonucci, R., Limongelli, O., Macci(`o), S., Mongelli, F., Colonna, F., Dragovic, D., Calipa, M. T., Cohen, A., Moresco, L., La Spina, R., Ruggeri, R., Luehwink, A., Brattoli, M., Fedi, A., Lacchi, L., Ettore, G., Pappalardo, E., Conoscenti, G., Zeni, B., Spellecchia, D., Favretti, L., Spagna, L., Zaglio, S., Bresciani, D., Bandini, A., Mancini, R., Mustoni, P., Dodero, D., Grimaldi, M., Di Mario, M., Migliorini, P., Kemeny, A., Anastasio, P. S., Riccardi, T., Maggino, T., Cerri, G., Puggina, P., Marconi, A. M., Morgia, S., Bellia, G., D?anna, M. R., Catania, M., Bacchi Modena, A., Franchi, L., Calonaci, N., Schettini, S., Paradiso, R., Saccucci, P., Ioppi, M., Zorzi, M., Stellin, G., Patacchiola, F., Carrata, L., Bassini, D., San Marco, L., Todros, T., Tibadi, C., Liborio, M., Laricchia, R., Tauro, L., Ferrara, F., Nuara, C., Ghiraldi, E., Molinari, F., Comessatti, A., Rocchetti, A., Di Matteo, L., Miconi, V., Calvi, P., Pernigotti, A., Fabozzi, F., Micca, G., Monticone, G., Sarti, M., Da Rin, G., Zoppelletto, M., Modolo, E., Landini, M. P., Furlini, G., Galluppi, E., Pagani, E., Aschbacher, R., Innocenti, P., Bresolin, N., Raggi, M. E., Bonfanti, C., De Francesco, M., Santer, P., Griessmaier, A., De Francesco, D., Pirali, A., Prasciolu, C., Usai, F., Cuzzone, G., Scutell(`a), M., Tramacere, P., Fossati, D., Piaserico, G., Bordignon, G., Sciacca, A., Di Vincenzo, F., Imbriani, A., Melotti, D., Catanoso, G., Rivetti, I., Neri, G., Bruno, R., Bacelle, L., Sartore, P., Giana, G., Sala, E., Giraldi, C., Cavalcanti, P., Perugini, M., Perugini, A., Ginardi, C., Maritano, D., Ferrini, A., Bonettini, A., Avanzini, A., Gasperoni, S., Pieretti, B., Montanari, E., Carillo, C., Rossi, M. R., Laureti, A., Baldoni, M. L., Serra, D., Melioli, G., Bandettini, R., Oneto, F., Colla, R., Storchi Incerti, S., Lanzini, F., Pauri, P., Tili, E., Leone, R. A., Verdastro, G., Megha, M., Luzzaro, F., Conti, A., Busulini, L., Mirri, P., Diodati, R., Vettori, C., Pittalis, S., Anesi, A., Fiore, A., Goglia, L., Vitullo, E., Sinno, A., Platzgummer, S., Spitaler, C., Trabucchi, M. C., Besozzi, M., Cesana, E., Inghilleri, G., Grosso, S., D?angelo, R., Fogato, E., Lavarda, F., Ortisi, G., Clementi, M., Cichero, P., Rumpianesi, F., Venturelli, C., Mortillaro, F., Daffara, S., Catania, M. R., Iula, D., Andreoni, S., Politi, A., Agostinelli, C., Paparella, C., Capozzi, D., Notaris, P., Bistoni, F., Mencacci, A., Valentini, M., Filippetti, A., Confalonieri, M., Novarese, O., Bonini, F., Salamone, D., Camporese, A., De Rosa, R., Casprini, P., Degl?innocenti, R., Giordano, R., All(`u), M. T., Zanella, D., Malandrino, M., Tronci, M., Valmarin, M., Leonetti, G., Falco, S., Meledandri, M., Ballardini, M., Span(`o), A., Cava, M. C., Mascellino, M. T., Schinella, M., Gualdi, P., Casari, E., Scattolo, N., Motta, C., Perfetti, C., Bassano, M., Cera, G., Iafisco, P., Mura, I., Palmieri, A., Migliardi, M., Ferlini, M., Grandi, G., Giardini, F., Albano, F., Latino, M., Ferrero, M. P., Bellizia, L., Russolo, M., Russolo, S., Pesenti, A., Fasano, M. A., Previato, S., Radillo, O., Busetti, M., Ferrari, P., Siderini, V., Puzzolante, L., Scarparo, C., Arzese, A., Cappuccia, N., Lodolo, L., Delledonne, L., Gramoni, A., Maiolo, V., Gheller, A., Spadaro, S., Balzaretti, M., Tzialla, Chryssoula, Berardi, Alberto, Farina, Claudio, Clerici, Pierangelo, Borghesi, Alessandro, Viora, Elsa, Scollo, Paolo, Stronati, Mauro, [.., Lanari, Marcello, Faldella, Giacomo, and ]

Subjects
Male, Pediatrics, Group B, 0302 clinical medicine, Neonate, Pregnancy, Surveys and Questionnaires, Prevalence, Mass Screening, Blood culture, 030212 general & internal medicine, Antibiotic prophylaxis, Survey, GBS, Group B streptococcus, Infection, Newborn infant, Adult, Antibiotic Prophylaxis, Female, Health Surveys, Humans, Infant, Newborn, Italy, Neonatal Screening, Pregnancy Complications, Infectious, Prenatal Care, Primary Prevention, Risk Assessment, Streptococcal Infections, Streptococcus agalactiae, reproductive and urinary physiology, Group B streptococcu, medicine.diagnostic_test, lcsh:RJ1-570, Infectious, Perinatology and Child Health, Pediatrics, Perinatology and Child Health, medicine.medical_specialty, Antibiotic sensitivity, Group B Streptococcal Infection, Prenatal care, 03 medical and health sciences, 030225 pediatrics, medicine, Intensive care medicine, Mass screening, business.industry, Public health, Infant, lcsh:Pediatrics, Newborn, Pregnancy Complications, business
Abstract

Background There are no Italian data regarding the strategies for preventing neonatal group B streptococcal (GBS) infection. We conducted a national survey in order to explore obstetrical, neonatal and microbiological practices for the GBS prevention. Methods Three distinct questionnaires were sent to obstetricians, neonatologists and microbiologists. Questionnaires included data on prenatal GBS screening, maternal risk factors, intrapartum antibiotic prophylaxis, microbiological information concerning specimen processing and GBS antimicrobial susceptibility. Results All respondent obstetrical units used the culture-based screening approach to identify women who should receive intrapartum antibiotic prophylaxis, and more than half of the microbiological laboratories (58%) reported using specimen processing consistent with CDC guidelines. Most neonatal units (89 out of 107, 82%) reported using protocols for preventing GBS early-onset sepsis consistent with CDC guidelines. Conclusions The screening-based strategy is largely prevalent in Italy, and most protocols for preventing GBS early-onset sepsis are consistent with CDC guidelines. However, we found discrepancies in practices among centers that may reflect the lack of Italian guidelines issued by public health organizations.

Published
2017

5. Whole-Genome Sequencing and Molecular Analysis of Ceftazidime-Avibactam-Resistant KPC-Producing Klebsiella pneumoniae from Intestinal Colonization in Elderly Patients.

Author

Errico G, Del Grosso M, Pagnotta M, Marra M, Carollo M, Cerquetti M, Fogato E, Cesana E, Gentiloni Silverj F, Zabzuni D, Rossini A, Pantosti A, Tinelli M, Monaco M, and Giufrè M

Abstract

Ceftazidime-avibactam (CAZ-AVI) is an active antibiotic combination of a β-lactam-β-lactamase inhibitor against carbapenemase-producing Enterobacterales. Reports of resistance to CAZ-AVI other than metallo-β-lactamases have increased in recent years. The aim of this study was to analyze KPC- Klebsiella pneumoniae (KP) isolates resistant to CAZ-AVI from the intestinal carriage of hospitalized elderly patients in Italy, in February 2018-January 2020. Characterization of CAZ-AVI-resistant KP isolates, including MLST, resistome, virulome and plasmid content, was performed by WGS analysis. Out of six CAZ-AVI-resistant KP isolates, three belonged to ST101 and three to ST512; two isolates produced KPC-3 (both ST512), four had mutated KPC-3 (KPC-31, in ST101 and ST512, and KPC-46, both ST101). All CAZ-AVI-resistant KP isolates were multidrug-resistant and carried several resistance genes. The yersiniabactin ybt 9 gene cluster was present in all ST101 isolates, while, in ST512 isolates, no virulence genes were detected. Several plasmids were detected: IncF was present in all isolates, as well as IncR and Col440 in ST101 and IncX3 in ST512 isolates. In conclusion, it is important to monitor the circulation of K. pneumoniae resistant to CAZ-AVI to prevent the spread of clones causing difficult-to-treat infections. The presence of mutated KPC-3 in high-risk K. pneumoniae clones resistant to CAZ-AVI in hospitalized patients deserves attention.

Published
2023
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6. Whole Genome Sequencing and Molecular Analysis of Carbapenemase-Producing Escherichia coli from Intestinal Carriage in Elderly Inpatients.

Author

Giufrè M, Errico G, Monaco M, Del Grosso M, Sabbatucci M, Pantosti A, Cerquetti M, Pagnotta M, Marra M, Carollo M, Rossini A, Fogato E, Cesana E, Gentiloni Silverj F, Zabzuni D, and Tinelli M

Abstract

The spread of carbapenemase-producing (CP) Enterobacterales is currently a worldwide concern, especially in the elderly. Twelve CP- E. coli isolated from rectal swabs of colonized inpatients aged ≥65 years from four hospitals in two Italian cities (Milan and Rome) were analyzed by whole genome sequencing (WGS) to obtain multi-locus sequence typing (MLST), identification of carbapenemase-encoding genes, resistome, plasmid content, and virulence genes. MLST analysis showed the presence of 10 unrelated lineages: ST410 (three isolates from three different hospitals in two cities) and ST12, ST38, ST69, ST95, ST131, ST189, ST648, ST1288, and ST1598 (one isolate each). Most isolates (9/12, 75%) contained a serine-β-lactamase gene (5 bla KPC-3 , 2 bla KPC-2 , and 2 bla OXA-181 ), while three isolates harbored a metallo-β-lactamase gene (two bla NDM-5 and one bla VIM-1 ). In most CP- E. coli , the presence of more than one plasmid was observed, with the predominance of IncF. Several virulence genes were detected. All isolates contained genes enhancing the bacterial fitness, such as gad and ter C, and all isolates but one, fim H, encoding type 1 fimbriae. In conclusion, CP- E. coli clones colonizing elderly patients showed heterogeneous genetic backgrounds. We recommend strict surveillance to monitor and prevent the spread of successful, high-risk clones in healthcare settings.

Published
2022
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7. Dynamics of carbapenemase-producing Enterobacterales intestinal colonisation in the elderly population after hospital discharge, Italy, 2018-2020.

Author

Tinelli M, Rossini A, Scudeller L, Zabzuni D, Errico G, Fogato E, D'Angelo R, Gentiloni Silverj F, Cesana E, Bergamaschini LC, Pasi F, Monaco M, Cerquetti M, Pantosti A, and Giufrè M

Subjects
Aged, Bacterial Proteins genetics, Escherichia coli, Hospitals, Humans, Klebsiella pneumoniae, Longitudinal Studies, Patient Discharge, Phylogeny, beta-Lactamases genetics, Carbapenem-Resistant Enterobacteriaceae, Enterobacteriaceae Infections epidemiology
Abstract

Carbapenemase-producing Enterobacterales (CPE) represent a serious threat to public health worldwide. Elderly patients are at increased risk of colonisation/infection with CPE. This study aimed to evaluate the persistence of CPE colonisation and the genotypic characteristics of persistent strains in elderly people discharged from Italian hospitals. A longitudinal study was conducted in two Italian cities (March 2018 to September 2020) enrolling 137 patients aged ≥65 years with CPE intestinal colonisation at hospital discharge. CPE colonisation was evaluated after 4, 8 and 12 months. Competing risk analysis was used to explore the association between baseline characteristics and persistence at 4 months. For all isolates, carbapenemase typing and multilocus sequence typing were performed. Persistent isolates underwent whole-genome sequencing. Of 137 patients, 91% carried carbapenemase-producing Klebsiella pneumoniae (CP-KP) and 8.8% carried carbapenemase-producing Escherichia coli. Although a large number of patients were lost to follow-up owing to death or withdrawal, 28/65 patients (43.1%) remained colonised at Month 4; 16/42 (38.1%) and 5/28 (17.9%) were found colonised up to Months 8 and 12, respectively. Colonisation persistence was more frequent in patients with bacteraemia or complicated urinary tract infection while in hospital and in those staying in long-term care facilities (LTCFs). Clonal characteristics of CP-KP isolates did not appear to influence persistence. Isolates obtained from each persistent carrier were identical or highly related by SNP phylogenetic analysis. Identification of patients at higher risk of persistent intestinal carriage after hospital discharge can prompt control measures to limit the transmission of CPE in the community, especially in LTCF settings., Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2022 Elsevier Ltd and International Society of Antimicrobial Chemotherapy. All rights reserved.)

Published
2022
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8. Genomic Characterization of VIM and MCR Co-Producers: The First Two Clinical Cases, in Italy.

Author

Marchetti VM, Bitar I, Sarti M, Fogato E, Scaltriti E, Bracchi C, Hrabak J, Pongolini S, and Migliavacca R

Abstract

Background: the co-production of carbapenemases and mcr -genes represents a worrisome event in the treatment of Enterobacteriaceae infections. The aim of the study was to characterize the genomic features of two clinical Enterobacter cloacae complex (ECC) isolates, co-producing VIM and MCR enzymes, in Italy., Methods: species identification and antibiotic susceptibility profiling were performed using MALDI-TOF and broth microdilution methods, respectively. Transferability of the bla VIM- and mcr - type genes was verified through conjugation experiment. Extracted DNA was sequenced using long reads sequencing technology on the Sequel I platform (PacBio)., Results: the first isolate showed clinical resistance against ertapenem yet was colistin susceptible (EUCAST 2020 breakpoints). The mcr-9.2 gene was harbored on a conjugative IncHI2 plasmid, while the bla VIM-1 determinant was harbored on a conjugative IncN plasmid. The second isolate, resistant to both carbapenems and colistin, harbored: mcr-9 gene and its two component regulatory genes for increased expression on the chromosome, mcr-4.3 on non-conjugative (yet co-transferable) ColE plasmid, and bla VIM-1 on a non-conjugative IncA plasmid., Conclusions: to our knowledge, this is the first report of co-production of VIM and MCR in ECC isolates in Italy.

Published
2021
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9. Genomic Insight of VIM-harboring IncA Plasmid from a Clinical ST69 Escherichia coli Strain in Italy.

Author

Mattioni Marchetti V, Bitar I, Piazza A, Mercato A, Fogato E, Hrabak J, and Migliavacca R

Abstract

Background : VIM (Verona Integron-encoded Metallo-beta-lactamase) is a member of the Metallo-Beta-Lactamases (MBLs), and is able to hydrolyze all beta-lactams antibiotics, except for monobactams, and including carbapenems. Here we characterize a VIM-producing IncA plasmid isolated from a clinical ST69 Escherichia coli strain from an Italian Long-Term Care Facility (LTCF) inpatient. Methods : An antimicrobial susceptibility test and conjugation assay were carried out, and the transferability of the bla VIM-type gene was confirmed in the transconjugant. Whole-genome sequencing (WGS) of the strain 550 was performed using the Sequel I platform. Genome assembly was performed using "Microbial Assembly". Genomic analysis was conducted by uploading the contigs to ResFinder and PlasmidFinder databases. Results: Assembly resulted in three complete circular contigs: the chromosome (4,962,700 bp), an IncA plasmid (p550_IncA_VIM_1; 162,608 bp), harboring genes coding for aminoglycoside resistance ( aac(6')-Ib4 , ant(3″)-Ia , aph(3″)-Ib , aph(3')-XV , aph(6)-Id ), beta-lactam resistance ( bla SHV-12 , bla VIM-1 ), macrolides resistance ( mph(A) ), phenicol resistance ( catB2 ), quinolones resistance ( qnrS1 ), sulphonamide resistance ( sul1 , sul2 ), and trimethoprim resistance ( dfrA14 ), and an IncK/Z plasmid (p550_IncB_O_K_Z; 100,306 bp), free of antibiotic resistance genes. Conclusions: The increase in reports of IncA plasmids bearing different antimicrobial resistance genes highlights the overall important role of IncA plasmids in disseminating carbapenemase genes, with a preference for the bla VIM-1 gene in Italy.

Published
2020
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10. Abbiategrasso Brain Bank Protocol for Collecting, Processing and Characterizing Aging Brains.

Author

Poloni TE, Medici V, Carlos AF, Davin A, Ceretti A, Mangieri M, Cassini P, Vaccaro R, Zaccaria D, Abbondanza S, Bordoni M, Fantini V, Fogato E, Cereda C, Ceroni M, and Guaita A

Subjects
Aged, Brain pathology, Humans, Neurodegenerative Diseases pathology, Aging pathology, Brain cytology, Specimen Handling methods, Tissue Banks
Abstract

In a constantly aging population, the prevalence of neurodegenerative disorders is expected to rise. Understanding disease mechanisms is the key to find preventive and curative measures. The most effective way to achieve this is through direct examination of diseased and healthy brain tissue. The authors present a protocol to obtain, process, characterize and store good quality brain tissue donated by individuals registered in an antemortem brain donation program. The donation program includes a face-to-face empathic approach to people, a collection of complementary clinical, biological, social and lifestyle information and serial multi-dimensional assessments over time to track individual trajectories of normal aging and cognitive decline. Since many neurological diseases are asymmetrical, our brain bank offers a unique protocol for slicing fresh specimens. Brain sections of both hemispheres are alternately frozen (at -80 °C) or fixed in formalin; a fixed slice on one hemisphere corresponds to a frozen one on the other hemisphere. With this approach, a complete histological characterization of all frozen material can be obtained, and omics studies can be performed on histologically well-defined tissues from both hemispheres thus offering a more complete assessment of neurodegenerative disease mechanisms. Correct and definite diagnosis of these diseases can only be achieved by combining the clinical syndrome with the neuropathological evaluation, which often adds important etiological clues necessary to interpret the pathogenesis. This method can be time consuming, expensive and limited as it only covers a limited geographical area. Regardless of its limitations, the high degree of characterization it provides can be rewarding. Our ultimate goal is to establish the first Italian Brain Bank, all the while emphasizing the importance of neuropathologically verified epidemiological studies.

Published
2020
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11. Colonization of long-term care facility residents in three Italian Provinces by multidrug-resistant bacteria.

Author

Nucleo E, Caltagirone M, Marchetti VM, D'Angelo R, Fogato E, Confalonieri M, Reboli C, March A, Sleghel F, Soelva G, Pagani E, Aschbacher R, Migliavacca R, and Pagani L

Subjects
Acinetobacter baumannii enzymology, Acinetobacter baumannii genetics, Adult, Aged, Aged, 80 and over, Bacteria enzymology, Bacteria isolation & purification, Bacterial Proteins genetics, Enterobacteriaceae enzymology, Enterobacteriaceae genetics, Enterobacteriaceae Infections epidemiology, Escherichia coli Proteins genetics, Female, Humans, Infection Control, Italy epidemiology, Long-Term Care, Male, Methicillin-Resistant Staphylococcus aureus enzymology, Methicillin-Resistant Staphylococcus aureus genetics, Middle Aged, Molecular Epidemiology, Prevalence, Pseudomonas aeruginosa enzymology, Pseudomonas aeruginosa genetics, Risk Factors, Staphylococcal Infections epidemiology, Vancomycin-Resistant Enterococci enzymology, Vancomycin-Resistant Enterococci genetics, Young Adult, beta-Lactamases genetics, Bacteria genetics, Bacteria growth & development, Drug Resistance, Multiple, Bacterial genetics, Genes, MDR genetics
Abstract

Background: Rationale and aims of the study were to compare colonization frequencies with MDR bacteria isolated from LTCF residents in three different Northern Italian regions, to investigate risk factors for colonization and the genotypic characteristics of isolates. The screening included Enterobacteriaceae expressing extended-spectrum β-lactamases (ESβLs) and high-level AmpC cephalosporinases, carbapenemase-producing Enterobacteriaceae , Pseudomonas aeruginosa or Acinetobacter baumannii , methicillin-resistant Staphylococcus aureus (MRSA) and vancomycin-resistant enterococci (VRE)., Methods: Urine samples and rectal, inguinal, oropharyngeal and nasal swabs were plated on selective agar; resistance genes were sought by PCR and sequencing. Demographic and clinical data were collected., Results: Among the LTCF residents, 75.0% (78/104), 69.4% (84/121) and 66.1% (76/115) were colonized with at least one of the target organisms in LTCFs located in Milan, Piacenza and Bolzano, respectively. ESβL producers (60.5, 66.1 and 53.0%) were highly predominant, mainly belonging to Escherichia coli expressing CTX-M group-1 enzymes. Carbapenemase-producing enterobacteria were found in 7.6, 0.0 and 1.6% of residents; carbapemenase-producing P. aeruginosa and A. baumannii were also detected. Colonization by MRSA (24.0, 5.7 and 14.8%) and VRE (20.2, 0.8 and 0.8%) was highly variable. Several risk factors for colonization by ESβL-producing Enterobacteriaceae and MRSA were found and compared among LTCFs in the three Provinces. Colonization differences among the enrolled LTCFs can be partially explained by variation in risk factors, resident populations and staff/resident ratios, applied hygiene measures and especially the local antibiotic resistance epidemiology., Conclusions: The widespread diffusion of MDR bacteria in LTCFs within three Italian Provinces confirms that LTCFs are an important reservoir of MDR organisms in Italy and suggests that future efforts should focus on MDR screening, improved implementation of infection control strategies and antibiotic stewardship programs targeting the complex aspects of LTCFs., Competing Interests: The study was approved by the Ethics Committees of the three referring hospitals.Not applicable.The authors declare that they have no competing interests.Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Published
2018
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12. Emergence of Escherichia coli Sequence Type 131 (ST131) and ST3948 with KPC-2, KPC-3 and KPC-8 carbapenemases from a Long-Term Care and Rehabilitation Facility (LTCRF) in Northern Italy.

Author

Piazza A, Caltagirone M, Bitar I, Nucleo E, Spalla M, Fogato E, D'Angelo R, Pagani L, and Migliavacca R

Subjects
Aged, Aged, 80 and over, Anti-Bacterial Agents pharmacology, Bacterial Proteins genetics, Communicable Diseases, Emerging epidemiology, Escherichia coli classification, Escherichia coli drug effects, Escherichia coli genetics, Escherichia coli Proteins genetics, Female, Humans, Italy epidemiology, Male, Multilocus Sequence Typing, Phylogeny, Rehabilitation Centers statistics & numerical data, Skilled Nursing Facilities statistics & numerical data, beta-Lactamases genetics, Bacterial Proteins metabolism, Communicable Diseases, Emerging microbiology, Escherichia coli isolation & purification, Escherichia coli Proteins metabolism, beta-Lactamases metabolism
Abstract

Aim of the study was to characterize KPC-producing Escherichia coli (KPC-Ec) clinical isolates among a Northern Italy Long-Term Care and Rehabilitation Facility (LTCRF) residents. Thirteen consecutive non repeated MDR E. coli isolates showing ertapenem Minimum Inhibitory Concentrations (MICs) >0.5 mg/L, collected during the period March 2011 - May 2013 from ASP "Redaelli" inpatients, were investigated. The bla KPC/CTX-M/SHV/TEM/OXA genes were identified by PCR and sequencing. KPC-Ec isolates underwent phylotyping, Pulsed-Field Gel Electrophoresis (PFGE), multilocus sequence typing (MLST) and repetitive sequence-based PCR (rep-PCR) profiling. Incompatibility groups analysis and conjugation were also performed. Eleven out of 13 isolates, resulted bla KPC-type positive, were consistently resistant to third generation cephalosporins, fluoroquinolones and trimethoprim-sulphametoxazole (84.6 %), retaining susceptibility to colistin (EUCAST guidelines). At least n = 4/11 of KPC-Ec patients received ≥48 h of meropenem therapy. Sequencing identified 9 bla KPC-2, 1 bla KPC-3 and 1 bla KPC-8 determinants. KPC-Ec plasmids belonged to IncF group (FIIk replicon); conjugation confirmed bla KPC/TEM-1/OXA-9 genes transferability for 10 KPC-Ec. Although three pulsotypes (A, B, C) were identified, all KPC-Ec belonged to phylogenetic group B2. Clone B (B-B5) caused an outbreak of infection involving nine inpatients at five wards. Rep-PCR showed relatedness for seven representative KPC-Ec isolates. Here we report a LTCRF outbreak caused by a ST131-B2 E. coli associated with bla KPC-2 and bla KPC-8 genes, and the emergence of the new ST3948. Elderly people with co-morbidities are at risk for ST131 colonization. KPC-Ec clones local monitoring appears essential both to avoid their spreading among healthcare settings, and to improve therapeutic choices for LTCRF residents.

Published
2016
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