Aeromonas caviae and Aeromonas veronii Causing Acute Cholecystitis

2021 ◽  
Author(s):  
Thomas Zheng Jie Teng ◽  
Vishal G. Shelat
Keyword(s):  
Acute Cholecystitis ◽  
Aeromonas Veronii ◽  
Aeromonas Caviae

scholarly journals Envolvimento de Aeromonas em surto de doença diarréica aguda em São Bento do Una, Pernambuco

2006 ◽  
Vol 39 (2) ◽  
pp. 217-220 ◽  
Author(s):  
Ernesto Hofer ◽  
Cristhiane Moura Falavina dos Reis ◽  
Grace Nazareth Diogo Theophilo ◽  
Valdelúcia Oliveira Cavalcanti ◽  
Nancy Veloso de Lima ◽  
...  
Keyword(s):  
Vibrio Cholerae ◽  
Salmonella Spp ◽  
Aeromonas Veronii ◽  
Aeromonas Caviae ◽  
Shigella Spp

No primeiro semestre de 2004, ocorreu um surto de diarréia em São Bento do Una, Pernambuco, registrando-se 2.170 casos. Nas 582 coproculturas realizadas, 145 (25%) revelaram um enteropatógeno bacteriano, destacando 114 casos (19,5%) com a participação de Aeromonas, representadas por Aeromonas caviae (57/9,8%), Aeromonas veronii biovar sobria (23/3,9%), Aeromonas veronii biovar veronii (15/2,6%) e outras espécies (19/3,2%). Nos 31 episódios restantes (5,3%), foram detectados: V. cholerae O1 Ogawa toxigênico (18/3,1%), Salmonella spp (8/1,4%), Shigella spp (3/0,5%) e Vibrio cholerae não O1/não O139 (2/0,3%).

Importance of flagella and enterotoxins for Aeromonas virulence in a mouse model

2007 ◽  
Vol 53 (2) ◽  
pp. 261-269 ◽  
Author(s):  
Keya Sen ◽  
Dennis Lye
Keyword(s):  
Drinking Water ◽  
Virulence Factor ◽  
Genetic Characterization ◽  
Aeromonas Veronii ◽  
Aeromonas Caviae ◽  
Polymerase Chain ◽  
Immunocompromised Mice ◽  
Immunocompromised Hosts ◽  
Virulence Factor Genes

A genetic characterization of eight virulence factor genes, elastase, lipase, polar flagella (flaA/flaB, flaG), lateral flagella (lafA), and the enterotoxins alt, act, and ast, was performed using polymerase chain reaction with 55 drinking water and nine clinical isolates. When 16 Aeromonas hydrophila strains, seven Aeromonas veronii strains, and seven Aeromonas caviae strains exhibiting different combinations of virulence factor genes were tested in immunocompromised mice by intraperitoneal injection, only those strains that had one or more of the enterotoxins flaA, flaB, and either flaG or lafA showed signs of being virulent. The correlation was seen in 97% (29/30) of the strains, which included strains from drinking water. Thus, Aeromonas water isolates have the potential to be pathogenic in immunocompromised hosts.

Phenotypic identification ofAeromonasgenomospecies from clinical and environmental sources

1998 ◽  
Vol 44 (2) ◽  
pp. 103-108 ◽  
Author(s):  
N Borrell ◽  
M J Figueras ◽  
J Guarro
Keyword(s):  
Drinking Water ◽  
Aeromonas Hydrophila ◽  
Sea Water ◽  
Aeromonas Veronii ◽  
Aeromonas Caviae ◽  
Food Borne ◽  
Lakes And Reservoirs ◽  
Treated Drinking Water ◽  
Prevalent Species ◽  
Isolated Species

A collection of 983 Aeromonas isolates from environmental and clinical sources have been identified to the genomospecies level. A phenotypic method identified 93% of the strains. The use of citrate and the production of acid from sorbitol enabled the members of the Aeromonas hydrophila complex to be separated. The most common genomospecies from intestinal sources were Aeromonas veronii biotype sobria and Aeromonas caviae. The former, together with A. hydrophila,was the most frequently isolated species of extraintestinal origin. Most pathogenic species were very prevalent in environmental samples, with A. veronii biotype sobria being the most common in lakes and reservoirs (41.5%) and in treated drinking water (25.0%), and A. caviae was the most common in sea water (26.0%) and milk products (35.5%). Aeromonas hydrophila (18.1%) was the second most prevalent species isolated in untreated drinking water. Since Aeromonas infections are generally regarded as a water- and food-borne diseases, the high environmental prevalence of these pathogenic genomospecies should be regarded as an important threat to public health.Key words: Aeromonas, food, water, clinical, Spain.

scholarly journals Caracterização de Aeromonas spp isoladas de neonatos hospitalizados

2008 ◽  
Vol 41 (2) ◽  
pp. 179-182 ◽  
Author(s):  
Christiane Soares Pereira ◽  
Simone Duarte Amorim ◽  
André Felipe das Mercês Santos ◽  
Cristhiane Moura Falavina dos Reis ◽  
Grace Nazareth Diogo Theophilo ◽  
...  
Keyword(s):  
Aeromonas Hydrophila ◽  
Rio De Janeiro ◽  
Aeromonas Veronii ◽  
Aeromonas Sobria ◽  
Aeromonas Caviae

Aeromonas spp é reconhecida como patogênica para o homem após o consumo de água e alimentos contaminados. Na presente investigação, foram avaliadas 2.323 amostras de swabs retais de neonatos hospitalizados no Rio de Janeiro objetivando o isolamento de Aeromonas. As amostras foram coletadas e enviadas ao Laboratório de Referência Nacional de Cólera e outras enteroinfecções bacterianas, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz. Os swabs foram submetidos ao enriquecimento em água peptonada alcalina adicionada de 1% de cloreto de sódio (NaCl) e água peptonada alcalina adicionada de 3% de NaCl (37ºC/18-24h) e semeadas em agar seletivo para Pseudomonas aeromonas (Agar GSP). Foram isoladas 56 cepas de Aeromonas assim distribuídas: Aeromonas caviae (42,8%), Aeromonas media (25%), Aeromonas veronii biogrupo sobria (10,7%), Aeromonas hydrophila (9%), Aeromonas veronii biogrupo veronii (5,3%), Aeromonas sobria (1,8%), Aeromonas jandaei (1,8%), Aeromonas schubertii (1,8%) e Aeromonas sp (1,8%). Foi observada resistência a uma ou mais drogas antimicrobianas em 26,8% das cepas. Considerando a relevância de Aeromonas torna-se urgente alertar sobre sua importância para o controle de infecções hospitalares.

scholarly journals Ocorrência de Aeromonas spp. em alimentos de origem animal e sua importância em saúde pública

2015 ◽  
Vol 82 (0) ◽  
Author(s):  
Alana Borges Tavares ◽  
Natacha Deboni Cereser ◽  
Cláudio Dias Timm
Keyword(s):  
Aeromonas Hydrophila ◽  
Aeromonas Veronii ◽  
Aeromonas Caviae

Aeromonas spp. são bactérias Gram negativas, opor-tunistas, de natureza ubíqua, isoladas principalmente de amostras de água. Até o presente momento foram reconhecidas 31 espé-cies, sendo as de maior importância médica Aeromonas hydrophila, Aeromonas caviae e Aeromonas veronii. A patogenicidade do gênero é considerada multifatorial, sendo este produtor de diversos tipos de toxinas e com envolvimento de outros fatores capazes de facilitar a penetração e o estabelecimento do agente no hospedeiro, causando doença. O objetivo desta revisão é elucidar o papel dos alimentos de origem animal como fontes de contaminação de bactérias do gênero Aeromonas para o ser humano. Isolamentos de aeromonas de diversos produtos de origem animal têm sido relatados, como carne, leite e seus derivados, além de frutos do mar, e em ambientes de processamento, como abatedouros, frigorífcos e laticínios. Tem-se buscado determinar fontes de contaminação dos alimentos, e a água foi definida como o principal disseminador. Aeromonas já foi defnida como sendo a causadora de diversas enfermidades, desde afecções gastrointestinais até casos de meningite e morte. Considerando os alimentos de origem animal como importantes veículos de transmissão para o ser humano e o reconhecimento da água como fonte de disseminação do agente, torna-se imprescindível o tratamento adequado da água utilizada nos estabelecimentos processadores de alimentos para a segurança alimentar.

scholarly journals BACTÉRIAS DO GÊNERO AEROMONAS NO FLUXOGRAMA DE BENEFICIAMENTO DO LEITE TIPO A E SEU COMPORTAMENTO FRENTE À AÇÃO DE ANTIMICROBIANOS

2006 ◽  
Vol 73 (3) ◽  
pp. 271-276
Author(s):  
M.S. Carneiro ◽  
O.D Rossi Junior
Keyword(s):  
Aeromonas Hydrophila ◽  
Aeromonas Veronii ◽  
Aeromonas Sobria ◽  
Aeromonas Caviae

RESUMO Objetivando verificar os possíveis pontos de contaminação e disseminação de bactérias do gênero Aeromonas, foram analisadas amostras de leite colhidas em diferentes pontos do fluxograma de beneficiamento em uma granja de leite tipo A. De 80 amostras analisadas, Aeromonas spp. foram isoladas em 37 (46,25%) delas. Foram colhidas 20 amostras de cada ponto da linha de produção e revelaram-se positivas no isolamento, 90% (18/20) das amostras de leite cru, 30% (6/ 20) das de leite da saída do pasteurizador, 40% (8/20) das de leite do tanque de abastecimento da máquina de empacotar e 25% (5/20) das amostras do leite pronto para consumo. Dentre as espécies foram identificadas Aeromonas sobria em 40,54% das amostras, Aeromonas hydrophila e Aeromonas caviae em 21,62% delas, Aeromonas veronii em 10,81% e Aeromonas schubertii em 2,7%. Das cepas isoladas, 37 foram submetidas a testes de sensibilidade a antimicrobianos. Destas, 100% foram resistentes à ampicilina, 75,67% à cefalotina, 64,86% à cefoxitina e 48,64% ao aztreonam. As drogas as quais as cepas mostraram-se menos resistentes foram, cloranfenicol, netilmicina, amicacina, gentamicina, tetraciclina e tobramicina. Os resultados obtidos demonstram que bactérias do gênero Aeromonas resistentes a vários antimicrobianos podem estar presentes no leite tipo A, o que faz com que este produto possa determinar risco à saúde da população consumidora, e que deve servir de alerta aos serviços de saúde pública.

scholarly journals Biochemical and Molecular Characterization of Tetracycline-Resistant Aeromonas veronii Isolates from Catfish

2006 ◽  
Vol 72 (10) ◽  
pp. 6461-6466 ◽  
Author(s):  
Mohamed Nawaz ◽  
Kidon Sung ◽  
Saeed A. Khan ◽  
Ashraf A. Khan ◽  
Roger Steele
Keyword(s):  
16S Rrna ◽  
Fragment Length Polymorphism ◽  
Dominant Gene ◽  
Rrna Gene ◽  
Pcr Assay ◽  
Banding Patterns ◽  
Aeromonas Veronii ◽  
Aeromonas Caviae ◽  
Multiplex Pcr Assay

ABSTRACT Eighty-one tetracycline-resistant Aeromonas sp. strains were isolated from farm-raised catfish. Morphological and biochemical characteristics indicated that 23 of the 81 aeromonads were Aeromonas hydrophila, 7 isolates were Aeromonas trota, 6 isolates were Aeromonas caviae, 42 isolates were Aeromonas veronii, and 3 isolates were Aeromonas jandaei. However, the AluI and MboI restriction fragment length polymorphism (RFLP) patterns of the PCR-amplified 1.4-kb 16S rRNA gene from all 81 tetracycline-resistant aeromonads from catfish were identical to the RFLP banding patterns of A. veronii ATCC 35626, indicating that all 81 isolates were strains of A. veronii. A multiplex PCR assay successfully amplified the 5 tetracycline-resistant genes (tetA to E) from the genomic DNA of all 81 isolates. The assay determined that tetE was the dominant gene occurring in 73/81 (90.0%) of the aeromonads. Plasmids (2.0 to 20 kb) were isolated from 33 of the 81 isolates. Dendrogram analysis of the SpeI pulsed-field gel electrophoresis identified 15 distinct macrorestriction patterns among the isolates. Our results indicate the need for use of 16S rRNA in the identification of Aeromonas spp. and the prevalence of catfish as a reservoir of tet genes.

scholarly journals An Update on the Genus Aeromonas: Taxonomy, Epidemiology, and Pathogenicity

2020 ◽  
Vol 8 (1) ◽  
pp. 129 ◽  
Author(s):  
Ana Fernández-Bravo ◽  
Maria José Figueras
Keyword(s):  
Housekeeping Genes ◽  
Opportunistic Pathogen ◽  
Host Cells ◽  
Emerging Pathogens ◽  
Pathogenic Potential ◽  
Aeromonas Veronii ◽  
Aeromonas Caviae ◽  
Great Health ◽  
Using Data ◽  
Type Strains

The genus Aeromonas belongs to the Aeromonadaceae family and comprises a group of Gram-negative bacteria widely distributed in aquatic environments, with some species able to cause disease in humans, fish, and other aquatic animals. However, bacteria of this genus are isolated from many other habitats, environments, and food products. The taxonomy of this genus is complex when phenotypic identification methods are used because such methods might not correctly identify all the species. On the other hand, molecular methods have proven very reliable, such as using the sequences of concatenated housekeeping genes like gyrB and rpoD or comparing the genomes with the type strains using a genomic index, such as the average nucleotide identity (ANI) or in silico DNA–DNA hybridization (isDDH). So far, 36 species have been described in the genus Aeromonas of which at least 19 are considered emerging pathogens to humans, causing a broad spectrum of infections. Having said that, when classifying 1852 strains that have been reported in various recent clinical cases, 95.4% were identified as only four species: Aeromonas caviae (37.26%), Aeromonas dhakensis (23.49%), Aeromonas veronii (21.54%), and Aeromonas hydrophila (13.07%). Since aeromonads were first associated with human disease, gastroenteritis, bacteremia, and wound infections have dominated. The literature shows that the pathogenic potential of Aeromonas is considered multifactorial and the presence of several virulence factors allows these bacteria to adhere, invade, and destroy the host cells, overcoming the immune host response. Based on current information about the ecology, epidemiology, and pathogenicity of the genus Aeromonas, we should assume that the infections these bacteria produce will remain a great health problem in the future. The ubiquitous distribution of these bacteria and the increasing elderly population, to whom these bacteria are an opportunistic pathogen, will facilitate this problem. In addition, using data from outbreak studies, it has been recognized that in cases of diarrhea, the infective dose of Aeromonas is relatively low. These poorly known bacteria should therefore be considered similarly as enteropathogens like Salmonella and Campylobacter.

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