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1.
Rev. Soc. Bras. Med. Trop ; 52: e20190290, 2019. graf
Article in English | LILACS | ID: biblio-1057257

ABSTRACT

Abstract INTRODUCTION: Salmonella enterica serotype Enteritidis (S. Enteritidis) is a cause of food-borne human illness. Given the prevalence of antibiotic resistance of Salmonella Enteritidis and the lack of antibiotic efficacy in future years, its replacement with other agents is necessary. One of the most useful agents is bacteriophages. METHODS S. Enteritidis was identified using a multiplex polymerase chain reaction assay. The effective bacteriophages were isolated from hospital wastewater samples. The effects of the bacteriophages were evaluated both in vitro and in vivo. RESULTS The phage SE20 belonged to the Podoviridae family, and the genome size was 40 kb. The evaluation of phage SE20 at variable pH ranges showed its susceptibility to pH < 3 and pH > 12. The animal model showed that mice infected with S. Enteritidis developed hepatomegaly and splenomegaly, but did not experience gastrointestinal complications after receiving the bacteriophages. CONCLUSIONS The results of this study suggest that phage SE20 is a promising candidate for controlling salmonellosis caused by Salmonella Enteritidis.


Subject(s)
Animals , Salmonella enteritidis , Salmonella Infections/therapy , Phage Therapy/methods , Disease Models, Animal , Multiplex Polymerase Chain Reaction , Mice
2.
Electron. j. biotechnol ; 31: 57-60, Jan. 2018. ilus, graf
Article in English | LILACS | ID: biblio-1022253

ABSTRACT

Background: Bacteriophages have been proposed as an alternative to control pathogenic bacteria resistant to antibiotics. However, they are not extensively used due to different factors such as vulnerability under environmental conditions and the lack of efficient administration methods. A potential solution is the encapsulation of bacteriophages in hydrogel polymers to increase their viability and as a controlled release method. This work describes the use of alginate-Ca+2 matrixes as mechanisms for protection and dosification of the phage f3αSE which has been successfully used to prevent infections produced by Salmonella Enteritidis. Results: The viability of the pure phage is reduced in near 100% after 1-h incubation at pH 2 or 3. However, the encapsulated phage remains active in 80, 6% at pH 3, while no differences were observed at pH 2, 4 or 7. Exposition of f3αSE to different T° showed that the viability of this phage decreased with increased T° to near 15% at 60°C, while the encapsulated phage remains with 50% viability at same temperature. Finally, the encapsulation of phages showed to extend their presence for 100 h in the medium compared to non-encapsulated phages in a water flow system, which simulate automatic birdbath used in poultry industry, maintaining the phage concentration between 102 and 104 PFU/mL during 250 h. Conclusions: Encapsulation in alginate-Ca+2 spheres can be a good alternative to extend viability of phages and can be used as a phage method dosification method in water flow systems.


Subject(s)
Salmonella enteritidis/pathogenicity , Salmonella Infections/therapy , Bacteriophages/physiology , Alginates/chemistry , Polymers , Temperature , Capsules , Hydrogel, Polyethylene Glycol Dimethacrylate , Microbial Viability , Hydrogen-Ion Concentration
3.
Indian J Pediatr ; 2010 July; 77(7): 807-808
Article in English | IMSEAR | ID: sea-142637

ABSTRACT

Osteoarticular infections caused by Non-typhi Salmonella are exceptionally encountered. We report a case of a bacteriologically documented knee joint infection due to Salmonella enterica serotype enteritidis, following trauma in a child with thalassemia major. Emergency arthrotomy combined with antimicrobial therapy was helpful in eradication of infection. Physicians should be aware of this rare manifestation of Non-typhi Salmonella infections in thalassemic patients.


Subject(s)
Arthritis, Infectious/etiology , Arthritis, Infectious/microbiology , Arthritis, Infectious/therapy , Child , Humans , Knee Injuries/complications , Knee Joint , Salmonella Infections/etiology , Salmonella Infections/therapy , Salmonella enteritidis , beta-Thalassemia/complications
4.
Belo Horizonte; s.n; 2008. 222 p. ilus, tab.
Thesis in Portuguese | LILACS, ColecionaSUS | ID: biblio-1425623

ABSTRACT

Probióticos são definidos como microrganismos viáveis que exibem um efeito benéfico na saúde do hospedeiro, quando ingeridos em quantidades suficientes. Muitas espécies de bactérias são usadas para esse fim e a única levedura utilizada como probióticos em seres humanos é Saccharomyces boulardii. Resultados anteriores obtidos em nosso laboratório mostraram que a levedura Saccharomyces cerevisiae linhagem UFMG 905, isolada da produção de cachaça, foi capaz de colonizar e sobreviver no trato gastrintestinal de camundongos, isentos de germes e convencionais, respectivamente, além de proteger esses animais contra um desafio oral com Salmonella enterica subsp. enterica sorovar Typhimurium e Clostridium difficile. Na primeira parte desse trabalho, os efeitos de S. cerevisiae UFMG 905 na translocação de Salm. Typhimurium para os linfonodos mesentéricos, placas de Peyer, baço e fígado, assim como o efeito no sistema imune, pela contagem de células de Küpffer, produção de imunoglobulinas e clareamento de Escherichia coli B41 da corrente sanguínea, foram avaliados em camundongos gnotobióticos e/ou convencionais. O tratamento com a levedura reduziu significantemente a translocação de Salm. Typhimurium para o fígado de animais gnotobióticos e, para todos os órgãos testados, em animais convencionais. O número de células de Küpffer (por 100 hepatócitos) foi significantemente maior (P < 0,05) em camundongos monoassociados com a levedura (52,9 ± 15,7) que em camundongos isentos de germes (38,1 ± 9,0). Provavelmente, como uma consequência do aumento do número de células de Küpffer, o clareamento de E. coli B41 da corrente sanguínea foi mais eficiente nos animais monoassociados com a levedura, quando comparado com os animais controle isentos de germes. Foram observados maiores níveis de sIgA no conteúdo intestinal e de IgA e IgM no soro (P < 0,05) nos camundongos monoassociados com a levedura que no grupo isento de germes. Concluindo, a proteção observada contra a bactéria enteropatogênica em nosso estudo anterior foi, provavelmente, devida à modulação local e sistêmica do sistema imune de camundongos tratados com S. cerevisiae UFMG 905. Na segunda parte desse trabalho, estudou-se os efeitos de S. boulardii e S. cerevisiae UFMG 905 na inflamação e na sinalização celular induzidos pela Salm. Typhimurium 14028, em células T84. Observou-se que os dois probióticos mantiveram a resistência elétrica transepitelial e diminuiram, significativamente, a secreção de IL-8 em células T84 infectadas por Salm. Typhimurium 14028 (P < 0,05). Saccharomyces cerevisiae UFMG 905 e S. boulardii diminuiram, significativamente, os níveis de invasão pela Salm. Typhimurium 14028 (P < 0,05), mas nenhum efeito das leveduras no xxxii crescimento ou adesão bacteriana em células T84 foi observado. Diferentemente de S. boulardii, S. cerevisiae UFMG 905 não foi capaz de diminuir a ativação de Rac1 e Cdc42 em células infectadas por Salm. Typhimurium 14028. Essas duas proteínas são Rho-GTPases ativadas pela bactéria e estão envolvidas na internalização de bactérias invasivas. A ligação de Salm. Typhimurium 14028 à superfície de S. cerevisiae UFMG 905 e S. boulardii, e não às células epiteliais do intestino, pode ser responsável pela diminuição da invasão e ativação de MAPKs (mitogen-activated protein kinases) e, conseqüentemente, pela diminuição dos níveis de IL-8, uma vez que esse processo diminui o número de bactérias ligadas às células T84. Entretanto, a diminuição dos níveis de IL-8 também pode ser explicada por uma imunomodulação, via secreção de citocinas anti-inflamatórias, como a IL-10, mas essa hipótese não foi testada nesse trabalho. A presença das leveduras em células infectadas com Salm. Typhimurium 14028 também reduziu e/ou inibiu a fosforilação das MAPKs ERK1/2, p38 e JNK, mas não diminuiu a ligação do fator de transcrição para IL-8 (NF-κB) ao DNA, sugerindo que a diminuição dos níveis de IL-8 não foi devido à inibição do fator de transcrição para IL-8, mas, provavelmente, ao efeito das leveduras na inibição da MAPK p38, que é a proteína responsável pela estabilização do mRNA para IL-8. Uma outra explicação é o fato de as duas leveduras inibirem a MAPK JNK, uma vez que AP-1 (outro fator de transcrição para IL-8) é dependente da fosforilação dessa proteína. Finalmente, S. cerevisiae UFMG 905 e S. boulardii inibem, também, a ativação de mecanismos antiinflamatórios (a via PI3K/Akt) induzidos por Salm. Typhimurium 14028 em células T84. Concluindo, S. cerevisiae UFMG 905 e S. boulardii apresentaram um efeito protetor e modulador na função de barreira e na sinalização celular induzida em células T84 pela Salm. Typhimurium 14028.


Probiotics are defined as viable microorganisms that exhibit a beneficial effect on the host health when ingested in adequate amounts. Many species of bacteria are used for this purpose and the only one yeast used as probiotic in humans is Saccharomyces boulardii. Previous results in our laboratory showed that Saccharomyces cerevisiae strain UFMG 905, isolated from "cachaça" production, was able to colonize and survive in the gastrointestinal tract of germ-free and conventional mice, respectively, and to protect these animals against oral challenge with Salmonella enterica subsp. enterica serovar Typhimurium and Clostridium difficile. In the first part of this work, the effects of S. cerevisiae UFMG 905 on the translocation of Salm. Typhimurium to mesenteric lymph nodes, Peyer's patches, spleen and liver, as well as on the immune system by number of Küpffer cells, immunoglobulin production and clearance of Escherichia coli B41, were evaluated in gnotobiotic and/or conventional mice. The treatment with the yeast reduced significantly the translocation of Salm. Typhimurium to liver in gnotobiotic animals and to all the organs tested in conventional mice. The number of Küpffer cells per 100 hepatocytes in liver was significantly higher (P < 0.05) in yeast mono-associated mice (52.9 ± 15.7) than in germ-free controls (38.1 ± 9.0). Probably, as a consequence, clearance of E. coli B41 from the bloodstream was more efficient in yeast mono-associated animals when compared to germ-free mice. Higher levels (P < 0.05) of sIgA in intestinal content and of IgA and IgM in serum were observed in yeast mono-associated mice when compared to germ-free group. Concluding, the protection against pathogenic bacteria observed in a previous study was probably due to a modulation of both local and systemic immunity of mice treated with S. cerevisiae UFMG 905. In a second part of this work, we have studied the effects of S. boulardii and S. cerevisiae UFMG 905 on the inflammation and signal transduction induced by Salm. Typhimurium ATCC 14028 in T84 cells. We have observed that both probiotics maintained the transmonolayer electrical resistance and significantly diminished IL-8 secretion in Salm. Typhimurium 14028-infected T84 cells (P < 0.05). Saccharomyces cerevisiae UFMG 905 and S. boulardii also decreased significantly the levels of Salm. Typhimurium 14028 invasion (P < 0.05), but had no effect on Salm. Typhimurium 14028 growth or adhesion to T84 cells. Differently from S. boulardii, S. cerevisiae UFMG 905 was not implicated in the diminution of the activation of Rac1 and Cdc42 in Salm. Typhimurium 14028-infected cells, which are Rho-GTPases activated by the bacteria involved in the internalization of invasive bacteria. The binding of Salm. Xxxv Typhimurium 14028 to S. cerevisiae UFMG 905 and S. boulardii surface instead of T84 cells may be responsible for the diminution of invasion and activation of MAPKs (mitogen-activated protein kinases) and consequently by the diminution of IL-8 levels, since this process diminishes the number of bacteria bound to T84 cells. However, the diminution of IL-8 may also be explained by an immunomodulation through secretion of anti-inflammatory cytokines, such as IL-10, but this hypothesis was not tested in this work. The presence of the yeasts in Salm. Typhimurium 14028-infected cells also reduced and/or inhibited the phosphorylation of ERK1/2, p38 and JNK MAPKs, but did not inhibit NF-κB DNA binding activity, suggesting that the diminution of IL-8 levels was not due to inhibition of the IL-8 transcription factor but more probably to the effects of the yeasts on the p38 MAPK inhibition, which is responsible for the stabilization of IL-8 mRNA. The inhibition of JNK by the yeasts may be another explanation, once AP-1, another IL-8 transcription factor, is dependent on the phosphorylation of this protein. Finally, S. cerevisiae UFMG 905 and S. boulardii inhibited the activation of anti-inflammatory mechanism (PI3K/Akt pathway) induced by Salm. Typhimurium 14028 in T84 cells. Concluding, S. cerevisiae UFMG 905 and S. boulardii showed a protective and modulating effect on barrier function and signal transduction pathway in T84 cells when infected by Salm. Typhimurium 14028.


Subject(s)
Saccharomyces cerevisiae , Saccharomyces boulardii , Salmonella Infections/therapy , Academic Dissertation , Salmonella enterica , Probiotics/therapeutic use
5.
In. Veronesi, Ricardo; Focaccia, Roberto. Tratado de infectologia: v.1. Säo Paulo, Atheneu, 2 ed; 2002. p.878-885, ilus, tab. (BR).
Monography in Portuguese | LILACS | ID: lil-317724
6.
Rev. Inst. Med. Trop. Säo Paulo ; 40(4): 233-5, July-Aug. 1998.
Article in English | LILACS | ID: lil-225881

ABSTRACT

Apresentam-se os casos de dois jovens com bacteriemia por Salmonella associada a esquistossomose mansoni ativa em pacientes com a sindrome da imunodeficiencia adquirida. A apresentacao clinica incluiu sintomas e sinais inespecificos como fadiga, perda de peso, diarreia, febre prolongada e hepatoesplenomegalia. A biopsia hepatica em um paciente revelou granulomas mal formados em torno de ovos de S. mansoni e hepatite de intensidade moderada. O tratamento da esquistossomose com a oxamniquine induziu melhora clinica progressiva culminando com a cura da salmonelose e da esquistossomose. O reconhecimento da associacao Salmonella-S. mansoni em pacientes com AIDS mostra-se importante nesses casos pois o tratamento da esquistossomose melhora o prognostico da bacteriemia por Salmonella que pode tornar-se recorrente e fatal nos pacientes com AIDS


Subject(s)
Humans , Male , Adult , Diarrhea/etiology , AIDS-Related Opportunistic Infections/parasitology , Salmonella/isolation & purification , Acquired Immunodeficiency Syndrome/parasitology , Biopsy , Enzyme-Linked Immunosorbent Assay , Hepatitis , Salmonella Infections/diagnosis , Salmonella Infections/therapy , Oxamniquine/therapeutic use , Risk Factors , Schistosomiasis/diagnosis , Schistosomiasis/therapy , Signs and Symptoms
8.
In. Farhat, Calil Kairalla; Carvalho, Eduardo da Silva; Carvalho, Luiza Helena Falleiros Rodrigues; Succi, Regina Célia de Menezes. Infectologia pediátrica. Säo Paulo, Atheneu, 2 ed; 1998. p.317-22.
Monography in Portuguese | LILACS | ID: lil-260898
9.
An. méd. Asoc. Méd. Hosp. ABC ; 42(2): 84-9, abr.-jun. 1997. tab, ilus
Article in Spanish | LILACS | ID: lil-227083

ABSTRACT

Se trata de una mujer de 18 años con padecimiento actual de dos meses de evolución cracterizado por claudicación de ambos miembros superiores con mayor intensidad del derecho. Con base en la sintomatología, se realizó arteriografía, la cual evidenció estenosis a nivel de la subclavia derecha y fundamantó el diagnóstico de arteritis de Takayasu. En los estudios de laboratorios se encontró reacción de Widal posotiva (tífico O 1:640). La paciente tenía como antecedente el haber padecido fiebre tifoidea hacía tres meses; así lo indicaba la prueba serológica (tífico O 1:320) y la respuesta al tratamiento con ciproxima a dosis convencionales. La paciente también presentó lesiones en miembros inferiores compatibles clínicamente con eritema nodoso. Se ha sugerido una asociación entre varios procesos infecciosos y arteritis de Takayasu. Nosotros presentamos el primer caso de probable asociación entre arteritis de Takayasu e infección por Salmonella tiphy


Subject(s)
Humans , Female , Adult , Erythema , Intermittent Claudication , Salmonella Infections/complications , Salmonella Infections/therapy , Takayasu Arteritis/complications , Takayasu Arteritis/diagnosis , Takayasu Arteritis/therapy
11.
Rev. Inst. Med. Trop. Säo Paulo ; 37(4): 297-302, jul.-ago. 1995. ilus, tab
Article in English | LILACS | ID: lil-159101

ABSTRACT

Os lisotipos e os perfis de resistencia a antimicrobianos e plasmidial foram caracterizados em 111 amostras de Salmonella Typhimurium isoladas de fezes e sangue de criancas atendidas nas cidades do Rio de Janeiro e Salvador. A lisotipia evidenciou seis tipos fagicos distintos (19, 41, 97, 105, 120 e 193) com uma predominancia do lisotipo 193 (59,7 por cento) na primeira cidade e do fagotipo 105 (38,4 por cento) na segunda...


Subject(s)
Humans , Blood/microbiology , Feces/microbiology , Salmonella typhimurium/isolation & purification , Electrophoresis , Salmonella Infections/epidemiology , Salmonella Infections/therapy , R Factors/immunology , Drug Resistance/immunology , Serotyping
12.
Rev. chil. obstet. ginecol ; 57(4): 297-9, 1992.
Article in Spanish | LILACS | ID: lil-119246

ABSTRACT

Se presenta el caso de una paciente nuligesta de 29 años de edad, portadora de un absceso ovárico puro, de origen tífico, tratado por punción y drenaje por vía laparoscópica. Se discute lo infrecuente de la etiología y se revisa la literatura respecto al manejo endoscópico de colecciones supuradas pelvianas


Subject(s)
Humans , Female , Adult , Abscess/therapy , Laparoscopy , Ovarian Diseases/therapy , Salmonella Infections/therapy , Salmonella paratyphi A/pathogenicity
13.
Specialist Quarterly. 1992; 8 (3): 45-8
in English | IMEMR | ID: emr-26448

ABSTRACT

Chloramphenicol, Co-Trimoxazole and Amoxycillin are first line drugs used for treating Salmonellosis. There are instances where response to treatment is far from satisfactory and potentially toxic drugs are unnecessarily used for prolonged periods. One hundred consecutive positive blood cultures for Salmonella were analysed, highlighting resistance to first line drugs, [Chloramphenicol [30%], Co-trimoxazole [25%] and Amoxycillin [21%]]. Good sensitivity pattern emerged for Aztreonam [94%], Cefotaxime [94%] and Phosphomycine [89%]. The study also brings forward the need of doing blood culture and sensitivity for managing salmonellosis with confidence


Subject(s)
Humans , Anti-Bacterial Agents , Salmonella Infections/therapy , Drug Resistance, Microbial
15.
Rev. Hosp. Säo Paulo Esc. Paul. Med ; 1(4): 200-2, Dec. 1989.
Article in English | LILACS | ID: lil-140649

ABSTRACT

Adult male after swimming in flood water in an urban area presented icterohaemorrhagic leptospirosis and septicemic salmonellosis. Severe clinical signs were characterized by fever, septicemia, jaundice, vomiting, haemorrhagic diarrhea and acute kidney failure. Peritoneal dialysis and treatment with penicillin and chloramphenicol were applied. Diagnosis was made on clinical, epidemiological and laboratorial basis. There was anticorpic seroconversion specific for L icterochaemorrhagiae. Hemocultures were positive for Salmonella with antigenica structure 4,5,12:i:-, a possible monophasic variant of S. typhimurium, 05 + (4,5,12:i:1,2). The patient survived. Attention is called to the cumulative risks for diseases acquired on exposure on exposure to floods, such as this double occurrence of diseases, both of animal origin. In view of clinical signs of comparable pathogenic and epidemic expression, investigation should be directed towards laboratorial tests for concurrent diseases


Subject(s)
Adult , Humans , Male , Wastewater/adverse effects , Weil Disease/etiology , Floods , Salmonella Infections/etiology , Weil Disease/diagnosis , Weil Disease/therapy , Salmonella Infections/diagnosis , Salmonella Infections/therapy
16.
Arch. Hosp. Vargas ; 30(3/4): 145-8, jul.-dic. 1988. tab
Article in Spanish | LILACS | ID: lil-88961

ABSTRACT

Se presenta el caso de un paciente con absceso hepático único del lóbulo izquierdo por Salmonella dublin al cual se le practicó drenaje quirúrgico. El diagnóstico etiológico microbiano se realizó por cultivo del contenido del absceso y hemocultivo. El paciente recibió tratamiento antimicrobiano con Cefoperazona, Metronidazol y Gentamicina, egresando a los 29 días del post operatorio


Subject(s)
Adult , Humans , Male , Liver Abscess/diagnosis , Salmonella Infections/diagnosis , Liver Abscess/therapy , Salmonella Infections/therapy
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