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7. Modeling the effects of variable feeding patterns of larval ticks on the transmission of Borrelia lusitaniae and Borrelia afzelii

Author

Ferreri, Luca, Perazzo, Silvia, Venturino, Ezio, Giacobini, Mario, Bertolotti, Luigi, and Mannelli, Alessandro

Subjects
Quantitative Biology - Populations and Evolution
Abstract

Spirochetes belonging to the Borrelia burgdoferi sensu lato (sl) group cause Lyme Borreliosis (LB), which is the most commonly reported vector-borne zoonosis in Europe. B. burgdorferi sl is maintained in nature in a complex cycle involving Ixodes ricinus ticks and several species of vertebrate hosts. The transmission dynamics of B. burgdorferi sl is complicated by the varying competence of animals for different genospecies of spirochetes that, in turn, vary in their capability of causing disease. In this study, a set of difference equations simplifying the complex interaction between vectors and their hosts (competent and not for Borrelia) is built to gain insights into conditions underlying the dominance of B. lusitaniae (transmitted by lizards to susceptible ticks) and the maintenance of B. afzelii (transmitted by wild rodents) observed in a study area in Tuscany, Italy. Findings, in agreement with field observations, highlight the existence of a threshold for the fraction of larvae feeding on rodents below which the persistence of B. afzelii is not possible. Furthermore, thresholds change as nonlinear functions of the expected number of nymph bites on mice, and the transmission and recovery probabilities. In conclusion, our model provided an insight into mechanisms underlying the relative frequency of different Borrelia genospecies, as observed in field studies., Comment: 14 pages, 3 figures, to be published in Theoretical Population Biology

Published
2017
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9. Molecular Surveillance for Bocaparvoviruses and Bufaviruses in the European Hedgehog (Erinaceus europaeus)

Author

Sarchese, Vittorio, primary, Palombieri, Andrea, additional, Prandi, Ilaria, additional, Robetto, Serena, additional, Bertolotti, Luigi, additional, Capucchio, Maria Teresa, additional, Orusa, Riccardo, additional, Mauthe von Degerfeld, Mitzy, additional, Quaranta, Giuseppe, additional, Vacchetta, Massimo, additional, Martella, Vito, additional, Di Martino, Barbara, additional, and Di Profio, Federica, additional

Published
2024
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10. Cross-Sectional Serosurvey of Companion Animals Housed with SARS-CoV-2- Infected Owners, Italy

Author

Colitti, Barbara, Bertolotti, Luigi, Mannelli, Alessandro, Ferrara, Gianmarco, Vercelli, Andrea, Grassi, Andrea, Trentin, Claudio, Paltrinieri, Saverio, Nogarol, Chiara, Decaro, Nicola, Brocchi, Emiliana, and Rosati, Sergio

Subjects
Pet owners -- Statistics -- Health aspects, Cats -- Statistics -- Health aspects, Dogs -- Statistics -- Health aspects, Health
Abstract

After emerging in Wuhan, China, in December 2019, coronavirus disease (COVID-19), caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), rapidly became a serious threat to human health worldwide (1-3). [...]

Published
2021
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13. Pattern of tick aggregation on mice: larger than expected distribution tail enhances the spread of tick-borne pathogens

Author

Ferreri, Luca, Giacobini, Mario, Bajardi, Paolo, Bertolotti, Luigi, Bolzoni, Luca, Tagliapietra, Valentina, Rizzoli, Annapaola, and Rosà, Roberto

Subjects
Quantitative Biology - Populations and Evolution, Physics - Biological Physics, Physics - Data Analysis, Statistics and Probability, Statistics - Applications
Abstract

The spread of tick-borne pathogens represents an important threat to human and animal health in many parts of Eurasia. Here, we analysed a 9-year time series of Ixodes ricinus ticks feeding on Apodemus flavicollis mice (main reservoir-competent host for tick-borne encephalitis, TBE) sampled in Trentino (Northern Italy). The tail of the distribution of the number of ticks per host was fitted by three theoretical distributions: Negative Binomial (NB), Poisson-LogNormal (PoiLN), and Power-Law (PL). The fit with theoretical distributions indicated that the tail of the tick infestation pattern on mice is better described by the PL distribution. Moreover, we found that the tail of the distribution significantly changes with seasonal variations in host abundance. In order to investigate the effect of different tails of tick distribution on the invasion of a non-systemically transmitted pathogen, we simulated the transmission of a TBE-like virus between susceptible and infective ticks using a stochastic model. Model simulations indicated different outcomes of disease spreading when considering different distribution laws of ticks among hosts. Specifically, we found that the epidemic threshold and the prevalence equilibria obtained in epidemiological simulations with PL distribution are a good approximation of those observed in simulations feed by the empirical distribution. Moreover, we also found that the epidemic threshold for disease invasion was lower when considering the seasonal variation of tick aggregation., Comment: 32 pages, 13 figures, appears in PLOS Computational Biology 2014

Published
2014
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14. Detection and genetic characterization of chicken astrovirus and avian nephritis virus from hatchery to farm.

Author

Grego, Elena, Bertolotti, Luigi, Colitti, Barbara, Stella, Maria Cristina, Catania, Angela Maria, and Castellina, Carlo

Abstract

RESEARCH HIGHLIGHTSAstroviruses are an emerging hazard in hatchery management, and they are responsible for great economic losses in poultry farms worldwide. Chicken astrovirus (CAstV) and avian nephritis virus (ANV) are involved in decreased hatching rate, mainly due to embryo deaths, and pale and runted chicks too weak to hatch. Hatchery diseases occur through direct egg infection or vertical transmission. However, the specific role of astroviruses in these diseases is still largely unknown. To elucidate this a high-quality Piedmont hatchery (Italy) was selected based on farm clinical signs and the astrovirus serological positivity in the breeder farm. The viral dynamics were followed from the hatchery to the farm. The presence of both CAstV and ANV was monitored by evaluating the viral load in environmental and bird samples. Interestingly, both viruses were detected in chick yolk sacs at 18 days of incubation, and in the gut contents of 1-day chicks, whereas in the hatchery environmental samples, the eggs' external surfaces and the embryos’ intestinal contents were negative. The CAstV copy number was higher in bird tissues from the hatchery, while a greater ANV load was detected in bird tissues from the farm. Moreover, our data suggest vertical transmission of both viruses. Frequent co-infection was also observed in samples from both the hatchery and the farm. Lastly, the first Italian full-length genome and molecular characterization of ANV was obtained.Identified the role of the hatchery in astrovirus transmission.Sequenced the avian nephritis virus complete genome.Investigated tissue distribution of astrovirus from egg to chicks.Demonstrated co-infection of ANV/CAstV.Identified the role of the hatchery in astrovirus transmission.Sequenced the avian nephritis virus complete genome.Investigated tissue distribution of astrovirus from egg to chicks.Demonstrated co-infection of ANV/CAstV. [ABSTRACT FROM AUTHOR]

Published
2024
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15. A Genetic Programming Approach to Predict Mosquitoes Abundance

Author

Gervasi, Riccardo, Azzali, Irene, Bisanzio, Donal, Mosca, Andrea, Bertolotti, Luigi, Giacobini, Mario, Hutchison, David, Editorial Board Member, Kanade, Takeo, Editorial Board Member, Kittler, Josef, Editorial Board Member, Kleinberg, Jon M., Editorial Board Member, Mattern, Friedemann, Editorial Board Member, Mitchell, John C., Editorial Board Member, Naor, Moni, Editorial Board Member, Pandu Rangan, C., Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Terzopoulos, Demetri, Editorial Board Member, Tygar, Doug, Editorial Board Member, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Sekanina, Lukas, editor, Hu, Ting, editor, Lourenço, Nuno, editor, Richter, Hendrik, editor, and García-Sánchez, Pablo, editor

Published
2019
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29. Improving Phylogenetic Tree Interpretability by Means of Evolutionary Algorithms

Author

Cerutti, Francesco, Bertolotti, Luigi, Goldberg, Tony L., Giacobini, Mario, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Giacobini, Mario, editor, Vanneschi, Leonardo, editor, and Bush, William S., editor

Published
2012
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30. Adding Vertical Meaning to Phylogenetic Trees by Artificial Evolution

Author

Cerutti, Francesco, Bertolotti, Luigi, Goldberg, Tony L., Giacobini, Mario, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Goebel, Randy, editor, Siekmann, Jörg, editor, Wahlster, Wolfgang, editor, Kampis, George, editor, Karsai, István, editor, and Szathmáry, Eörs, editor

Published
2011
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32. Investigating Populational Evolutionary Algorithms to Add Vertical Meaning in Phylogenetic Trees

Author

Cerutti, Francesco, Bertolotti, Luigi, Goldberg, Tony L., Giacobini, Mario, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Pizzuti, Clara, editor, Ritchie, Marylyn D., editor, and Giacobini, Mario, editor

Published
2010
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37. Phylogeography and genomic epidemiology of SARS-CoV-2 in Italy and Europe with newly characterized Italian genomes between February-June 2020

Author

Lai, Alessia, Bergna, Annalisa, Toppo, Stefano, Morganti, Marina, Menzo, Stefano, Ghisetti, Valeria, Bruzzone, Bianca, Codeluppi, Mauro, Fiore, Vito, Rullo, Emmanuele Venanzi, Antonelli, Guido, Sarmati, Loredana, Brindicci, Gaetano, Callegaro, Annapaola, Sagnelli, Caterina, Francisci, Daniela, Vicenti, Ilaria, Miola, Arianna, Tonon, Giovanni, Cirillo, Daniela, Menozzi, Ilaria, Caucci, Sara, Cerutti, Francesco, Orsi, Andrea, Schiavo, Roberta, Babudieri, Sergio, Nunnari, Giuseppe, Mastroianni, Claudio M., Andreoni, Massimo, Monno, Laura, Guarneri, Davide, Coppola, Nicola, Crisanti, Andrea, Galli, Massimo, Zehender, Gianguglielmo, Balotta, Claudia, Ventura, Carla della, Schiuma, Marco, Lavezzo, Enrico, Fontana, Paolo, Bianco, Luca, Bertolotti, Luigi, Manuto, Laura, Grazioli, Marco, Bianca, Federico, Del Vecchio, Claudia, Franchin, Elisa, Onelia, Francesco, Spitaleri, Andrea, Saluzzo, Francesca, Lorenzin, Giovanni, Pongolini, Stefano, Scaltriti, Erika, Soliani, Laura, Bagnarelli, Patrizia, Turchi, Chiara, Onofri, Valerio, Melchionda, Filomena, Tagliabracci, Adriano, Burdino, Elisa, Milia, Maria Grazia, Caligiuri, Patrizia, De Pace, Vanessa, Ricucci, Valentina, Domnich, Alexander, Boccotti, Simona, Cristina, Leoni Maria, Cascio, Giuliana Lo, Rubino, Salvatore, Lai, Vincenzo, Rocca, Giulia, Govoni, Rosalba, Mancuso, Giuseppe, Campagna, Roberta, Mazzuti, Laura, Oliveto, Giuseppe, Turriziani, Ombretta, Campogiani, Laura, Compagno, Mirko, Coppola, Luigi, Crea, Angela Maria Antonia, De Simone, Giuseppe, Di Lorenzo, Andrea, Ferrari, Ludovica, Iannetta, Marco, Malagnino, Vincenzo, Mulas, Tiziana, Rossi, Benedetta, Spalliera, Ilaria, Tedde, Simona, Teti, Elisabetta, Vitale, Pietro, Zordan, Marta, Milano, Eugenio, Lagioia, Antonella, Gallitelli, Rosa, Starace, Mario, Minichini, Carmine, Di Fraia, Alessia, Schioppa, Maddalena, Greco, Rita, Gidari, Anna, Zazzi, Maurizio, Dragoni, Filippo, Puma, Laura Li, Ronchiadin, Silvia, Ruggerone, Luigi, Russignaga, Dario, Lai, Alessia, Bergna, Annalisa, Toppo, Stefano, Morganti, Marina, Menzo, Stefano, Ghisetti, Valeria, Bruzzone, Bianca, Codeluppi, Mauro, Fiore, Vito, Rullo, Emmanuele Venanzi, Antonelli, Guido, Sarmati, Loredana, Brindicci, Gaetano, Callegaro, Annapaola, Sagnelli, Caterina, Francisci, Daniela, Vicenti, Ilaria, Miola, Arianna, Tonon, Giovanni, Cirillo, Daniela, Menozzi, Ilaria, Caucci, Sara, Cerutti, Francesco, Orsi, Andrea, Schiavo, Roberta, Babudieri, Sergio, Nunnari, Giuseppe, Mastroianni, Claudio M, Andreoni, Massimo, Monno, Laura, Guarneri, Davide, Coppola, Nicola, Crisanti, Andrea, Galli, Massimo, and Zehender, Gianguglielmo

Subjects
Europe, Phylogeography, Genome, Italy, SARS-CoV-2, Communicable Disease Control, Humans, COVID-19, Genome, Viral, Viral, Settore MED/17, Human
Abstract

The aims of this study were to characterize new SARS-CoV-2 genomes sampled all over Italy and to reconstruct the origin and the evolutionary dynamics in Italy and Europe between February and June 2020. The cluster analysis showed only small clusters including < 80 Italian isolates, while most of the Italian strains were intermixed in the whole tree. Pure Italian clusters were observed mainly after the lockdown and distancing measures were adopted. Lineage B and B.1 spread between late January and early February 2020, from China to Veneto and Lombardy, respectively. Lineage B.1.1 (20B) most probably evolved within Italy and spread from central to south Italian regions, and to European countries. The lineage B.1.1.1 (20D) developed most probably in other European countries entering Italy only in the second half of March and remained localized in Piedmont until June 2020. In conclusion, within the limitations of phylogeographical reconstruction, the estimated ancestral scenario suggests an important role of China and Italy in the widespread diffusion of the D614G variant in Europe in the early phase of the pandemic and more dispersed exchanges involving several European countries from the second half of March 2020.

Published
2022

38. Rapid SARS-CoV-2 Intra-Host and Within-Household Emergence of Novel Haplotypes

Author

Manuto, Laura, primary, Grazioli, Marco, additional, Spitaleri, Andrea, additional, Fontana, Paolo, additional, Bianco, Luca, additional, Bertolotti, Luigi, additional, Bado, Martina, additional, Mazzotti, Giorgia, additional, Bianca, Federico, additional, Onelia, Francesco, additional, Lorenzin, Giovanni, additional, Simeoni, Fabio, additional, Lazarevic, Dejan, additional, Franchin, Elisa, additional, Vecchio, Claudia Del, additional, Dorigatti, Ilaria, additional, Tonon, Giovanni, additional, Cirillo, Daniela Maria, additional, Lavezzo, Enrico, additional, Crisanti, Andrea, additional, and Toppo, Stefano, additional

Published
2022
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41. Rapid longitudinal SARS-CoV-2 intra-host emergence of novel haplotypes regardless of immune deficiencies

Author

Manuto, Laura, primary, Grazioli, Marco, additional, Spitaleri, Andrea, additional, Fontana, Paolo, additional, Bianco, Luca, additional, Bertolotti, Luigi, additional, Bado, Martina, additional, Mazzotti, Giorgia, additional, Bianca, Federico, additional, Onelia, Francesco, additional, Lorenzin, Giovanni, additional, Simeoni, Fabio, additional, Lazarevic, Dejan, additional, Franchin, Elisa, additional, Del Vecchio, Claudia, additional, Dorigatti, Ilaria, additional, Tonon, Giovanni, additional, Cirillo, daniela, additional, Lavezzo, Enrico, additional, Crisanti, Andrea, additional, and Toppo, Stefano, additional

Published
2021
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42. Immunoproteomic analysis of Mycoplasma meleagridis proteins

Author

Rocha, Ticiana S., primary, Soggiù, Alessio, additional, Ronci, Maurizio, additional, Bertolotti, Luigi, additional, Roncada, Paola, additional, Catania, Salvatore, additional, Urbani, Andrea, additional, Bonizzi, Luigi, additional, and Rosati, Sergio, additional

Published
2014
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49. Rickettsia slovaca in Dermacentor marginatus and tick-borne lymphadenopathy, Tuscany, Italy

Author

Selmi, Marco, Bertolotti, Luigi, Tomassone, Laura, and Mannelli, Alessandro

Subjects
Lymphadenopathy -- Risk factors, Lymphadenopathy -- Diagnosis, Lymphadenopathy -- Care and treatment, Rickettsia -- Genetic aspects, Ticks -- Identification and classification, Ticks -- Genetic aspects
Abstract

Of 263 patients in Tuscany, Italy, from whom ticks were removed during July 2005-May 2007, five showed signs of tick-borne lymphadenopathy. Of the ticks, 17 were Dermacentor marginatus; 6 (35.3%) [...]

Published
2008

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