THE GROWTH RATE PHENOTYPIC PROPERTY OF MYCOBACTERIUM TUBERCULOSIS CLINICAL STRAINS: DEPENDENCE ON TUBERCULOSIS LOCALIZATION, TREATMENT, DRUG SUSCEPTIBILITY

The phenotypic properties of the M. tuberculosis strains obtained from patients with pulmonary or extra-pulmonary tuberculosis are determined by a complex set of factors: the genetic characteristics of the pathogen, its ability to adapt in vivo and in vitro, the influence of the host’s immune syst...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	O. A. Manicheva, M. Z. Dogonadze, N. N. Melnikova, B. I. Vishnevskiy, S. A. Manichev
Formato:	article
Lenguaje:	RU
Publicado:	Sankt-Peterburg : NIIÈM imeni Pastera 2018
Materias:	mycobacterium tuberculosis clinical strains drug resistance pulmonary tuberculosis extrapulmonary tuberculosis. Infectious and parasitic diseases RC109-216
Acceso en línea:	https://doaj.org/article/0e8fcbfc56f84df48e7af465120fe2bc
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:0e8fcbfc56f84df48e7af465120fe2bc
record_format	dspace
institution	DOAJ
collection	DOAJ
language	RU
topic	mycobacterium tuberculosis clinical strains drug resistance pulmonary tuberculosis extrapulmonary tuberculosis. Infectious and parasitic diseases RC109-216
spellingShingle	mycobacterium tuberculosis clinical strains drug resistance pulmonary tuberculosis extrapulmonary tuberculosis. Infectious and parasitic diseases RC109-216 O. A. Manicheva M. Z. Dogonadze N. N. Melnikova B. I. Vishnevskiy S. A. Manichev THE GROWTH RATE PHENOTYPIC PROPERTY OF MYCOBACTERIUM TUBERCULOSIS CLINICAL STRAINS: DEPENDENCE ON TUBERCULOSIS LOCALIZATION, TREATMENT, DRUG SUSCEPTIBILITY
description	The phenotypic properties of the M. tuberculosis strains obtained from patients with pulmonary or extra-pulmonary tuberculosis are determined by a complex set of factors: the genetic characteristics of the pathogen, its ability to adapt in vivo and in vitro, the influence of the host’s immune system and chemotherapy. The growth rate as the phenotypic property is the most accessible for the study of the host-pathogen relationships at the level of host/strain population interactions. The aim of the study is to assess in vitro of the growth rate of M. tuberculosis strains isolated from patients with pulmonary and extra-pulmonary tuberculosis: untreated and treated (with surgical and non-surgical treatment) and also sensitive and resistant isolates in comparison with the reference strain H37Rv. To estimate the growth rate of 116 clinical isolates we have used the modified method originally developed by von Groll and co-authors: to get the bacteria growth curve the fluorescence intensity of growing strains (with indicator resazurin) has been measured daily for 8 days in 96- well plate. The growth rate is determined as the slope of the growth curve. The mean values of the growth rate have been calculated in the following groups of patients: 1 — untreated patients with pulmonary tuberculosis (PT), respiratory material; 2 — non-surgical treated PT patients, respiratory material; 3 — surgical treated PT patients (mainly with chronic and hyperchronic process), respiratory material; 4 — patients like in 3rd group, surgical material; 5 — bone and joint tuberculosis (BJT), surgical material. In addition, groups of sensitive and resistant strains have been examined, but there are no significant differences in growth rates. It has been obtained that the growth rate of strains isolated from the PT patients is higher than in BJT patients: it can be explained less favorable conditions for the pathogen vegetation in the BJT. In the case of a closed tuberculous lesion where the pathogen transmission to another host is impossible, then the selection of strains with the property to survive in the tissues of the osteoarticular system is impossible too, therefor it should be observed only an adaptation of the pathogen strain population to the individual host. The growth rate of isolates from untreated PT patients is higher than that of the treated ones. Comparison of the growth parameters of only MDR strains 1–5 groups to eliminate the influence of the sensitivity/resistance has resulted in the same conclusions. We suggest that the decrease in the growth rate of strains from the treated PT patients is in not only result of the treatment, but also is conditioned by adaptation of the pathogen to its external environment, which is the internal environment of the macroorganism. To confirm this assumption, the bacterial load of 1,083 diagnostic specimens grouped in a similar manner has been estimated, taking into account only MDR/XDR strains. In the group of treated patients the frequency of high bacterial load (CFU ≥ 100) reached 52.5–63.8% that shows the conserved fitness of bacteria in such patients. The mean values of the growth rate of the strain H37Rv non-adapted to the macroorganism (due to numerous passages on artificial media) are higher than in all groups of clinical strains. Thus, heterogeneity of phenotypic properties of M. tuberculosis clinical strains on the basis of growth rate has been obtained. The growth rate of M. tuberculosis clinical strains is depended on the tuberculosis localization (PT, BJT) and on the joint effect of patient treatment and pathogen adaptation to the host.
format	article
author	O. A. Manicheva M. Z. Dogonadze N. N. Melnikova B. I. Vishnevskiy S. A. Manichev
author_facet	O. A. Manicheva M. Z. Dogonadze N. N. Melnikova B. I. Vishnevskiy S. A. Manichev
author_sort	O. A. Manicheva
title	THE GROWTH RATE PHENOTYPIC PROPERTY OF MYCOBACTERIUM TUBERCULOSIS CLINICAL STRAINS: DEPENDENCE ON TUBERCULOSIS LOCALIZATION, TREATMENT, DRUG SUSCEPTIBILITY
title_short	THE GROWTH RATE PHENOTYPIC PROPERTY OF MYCOBACTERIUM TUBERCULOSIS CLINICAL STRAINS: DEPENDENCE ON TUBERCULOSIS LOCALIZATION, TREATMENT, DRUG SUSCEPTIBILITY
title_full	THE GROWTH RATE PHENOTYPIC PROPERTY OF MYCOBACTERIUM TUBERCULOSIS CLINICAL STRAINS: DEPENDENCE ON TUBERCULOSIS LOCALIZATION, TREATMENT, DRUG SUSCEPTIBILITY
title_fullStr	THE GROWTH RATE PHENOTYPIC PROPERTY OF MYCOBACTERIUM TUBERCULOSIS CLINICAL STRAINS: DEPENDENCE ON TUBERCULOSIS LOCALIZATION, TREATMENT, DRUG SUSCEPTIBILITY
title_full_unstemmed	THE GROWTH RATE PHENOTYPIC PROPERTY OF MYCOBACTERIUM TUBERCULOSIS CLINICAL STRAINS: DEPENDENCE ON TUBERCULOSIS LOCALIZATION, TREATMENT, DRUG SUSCEPTIBILITY
title_sort	growth rate phenotypic property of mycobacterium tuberculosis clinical strains: dependence on tuberculosis localization, treatment, drug susceptibility
publisher	Sankt-Peterburg : NIIÈM imeni Pastera
publishDate	2018
url	https://doaj.org/article/0e8fcbfc56f84df48e7af465120fe2bc
work_keys_str_mv	AT oamanicheva thegrowthratephenotypicpropertyofmycobacteriumtuberculosisclinicalstrainsdependenceontuberculosislocalizationtreatmentdrugsusceptibility AT mzdogonadze thegrowthratephenotypicpropertyofmycobacteriumtuberculosisclinicalstrainsdependenceontuberculosislocalizationtreatmentdrugsusceptibility AT nnmelnikova thegrowthratephenotypicpropertyofmycobacteriumtuberculosisclinicalstrainsdependenceontuberculosislocalizationtreatmentdrugsusceptibility AT bivishnevskiy thegrowthratephenotypicpropertyofmycobacteriumtuberculosisclinicalstrainsdependenceontuberculosislocalizationtreatmentdrugsusceptibility AT samanichev thegrowthratephenotypicpropertyofmycobacteriumtuberculosisclinicalstrainsdependenceontuberculosislocalizationtreatmentdrugsusceptibility AT oamanicheva growthratephenotypicpropertyofmycobacteriumtuberculosisclinicalstrainsdependenceontuberculosislocalizationtreatmentdrugsusceptibility AT mzdogonadze growthratephenotypicpropertyofmycobacteriumtuberculosisclinicalstrainsdependenceontuberculosislocalizationtreatmentdrugsusceptibility AT nnmelnikova growthratephenotypicpropertyofmycobacteriumtuberculosisclinicalstrainsdependenceontuberculosislocalizationtreatmentdrugsusceptibility AT bivishnevskiy growthratephenotypicpropertyofmycobacteriumtuberculosisclinicalstrainsdependenceontuberculosislocalizationtreatmentdrugsusceptibility AT samanichev growthratephenotypicpropertyofmycobacteriumtuberculosisclinicalstrainsdependenceontuberculosislocalizationtreatmentdrugsusceptibility
_version_	1718417958889324544
spelling	oai:doaj.org-article:0e8fcbfc56f84df48e7af465120fe2bc2021-11-22T07:09:49ZTHE GROWTH RATE PHENOTYPIC PROPERTY OF MYCOBACTERIUM TUBERCULOSIS CLINICAL STRAINS: DEPENDENCE ON TUBERCULOSIS LOCALIZATION, TREATMENT, DRUG SUSCEPTIBILITY2220-76192313-739810.15789/2220-7619-2018-2-175-186https://doaj.org/article/0e8fcbfc56f84df48e7af465120fe2bc2018-09-01T00:00:00Zhttps://www.iimmun.ru/iimm/article/view/736https://doaj.org/toc/2220-7619https://doaj.org/toc/2313-7398The phenotypic properties of the M. tuberculosis strains obtained from patients with pulmonary or extra-pulmonary tuberculosis are determined by a complex set of factors: the genetic characteristics of the pathogen, its ability to adapt in vivo and in vitro, the influence of the host’s immune system and chemotherapy. The growth rate as the phenotypic property is the most accessible for the study of the host-pathogen relationships at the level of host/strain population interactions. The aim of the study is to assess in vitro of the growth rate of M. tuberculosis strains isolated from patients with pulmonary and extra-pulmonary tuberculosis: untreated and treated (with surgical and non-surgical treatment) and also sensitive and resistant isolates in comparison with the reference strain H37Rv. To estimate the growth rate of 116 clinical isolates we have used the modified method originally developed by von Groll and co-authors: to get the bacteria growth curve the fluorescence intensity of growing strains (with indicator resazurin) has been measured daily for 8 days in 96- well plate. The growth rate is determined as the slope of the growth curve. The mean values of the growth rate have been calculated in the following groups of patients: 1 — untreated patients with pulmonary tuberculosis (PT), respiratory material; 2 — non-surgical treated PT patients, respiratory material; 3 — surgical treated PT patients (mainly with chronic and hyperchronic process), respiratory material; 4 — patients like in 3rd group, surgical material; 5 — bone and joint tuberculosis (BJT), surgical material. In addition, groups of sensitive and resistant strains have been examined, but there are no significant differences in growth rates. It has been obtained that the growth rate of strains isolated from the PT patients is higher than in BJT patients: it can be explained less favorable conditions for the pathogen vegetation in the BJT. In the case of a closed tuberculous lesion where the pathogen transmission to another host is impossible, then the selection of strains with the property to survive in the tissues of the osteoarticular system is impossible too, therefor it should be observed only an adaptation of the pathogen strain population to the individual host. The growth rate of isolates from untreated PT patients is higher than that of the treated ones. Comparison of the growth parameters of only MDR strains 1–5 groups to eliminate the influence of the sensitivity/resistance has resulted in the same conclusions. We suggest that the decrease in the growth rate of strains from the treated PT patients is in not only result of the treatment, but also is conditioned by adaptation of the pathogen to its external environment, which is the internal environment of the macroorganism. To confirm this assumption, the bacterial load of 1,083 diagnostic specimens grouped in a similar manner has been estimated, taking into account only MDR/XDR strains. In the group of treated patients the frequency of high bacterial load (CFU ≥ 100) reached 52.5–63.8% that shows the conserved fitness of bacteria in such patients. The mean values of the growth rate of the strain H37Rv non-adapted to the macroorganism (due to numerous passages on artificial media) are higher than in all groups of clinical strains. Thus, heterogeneity of phenotypic properties of M. tuberculosis clinical strains on the basis of growth rate has been obtained. The growth rate of M. tuberculosis clinical strains is depended on the tuberculosis localization (PT, BJT) and on the joint effect of patient treatment and pathogen adaptation to the host.O. A. ManichevaM. Z. DogonadzeN. N. MelnikovaB. I. VishnevskiyS. A. ManichevSankt-Peterburg : NIIÈM imeni Pasteraarticlemycobacterium tuberculosisclinical strainsdrug resistancepulmonary tuberculosisextrapulmonary tuberculosis.Infectious and parasitic diseasesRC109-216RUInfekciâ i Immunitet, Vol 8, Iss 2, Pp 175-186 (2018)

THE GROWTH RATE PHENOTYPIC PROPERTY OF MYCOBACTERIUM TUBERCULOSIS CLINICAL STRAINS: DEPENDENCE ON TUBERCULOSIS LOCALIZATION, TREATMENT, DRUG SUSCEPTIBILITY

Ejemplares similares