scholarly journals HTLV-1 infection is associated with a history of active tuberculosis among family members of HTLV-1-infected patients in Peru

2007 ◽  
Vol 136 (8) ◽  
pp. 1076-1083 ◽  
Author(s):  
K. VERDONCK ◽  
E. GONZÁLEZ ◽  
W. SCHROOTEN ◽  
G. VANHAM ◽  
E. GOTUZZO
Keyword(s):  
Multivariate Analysis ◽  
Index Case ◽  
Family Members ◽  
Active Tuberculosis ◽  
T Lymphotropic Virus ◽  
Lifetime History ◽  
History Of ◽  
Index Cases

SUMMARYThe purpose of this study was to assess the association between human T-lymphotropic virus 1 (HTLV-1) and a lifetime history of active tuberculosis (TB) among relatives of HTLV-1-infected patients. We reviewed clinical charts of all relatives of HTLV-1-infected index cases who attended our institute in Lima from 1990–2004. The data of 1233 relatives was analysed; 394 (32·0%) were HTLV-1 positive. Eighty-one subjects (6·6%) had a history of active TB, including 45/394 (11·4%) HTLV-1-positive and 36/839 (4·3%) HTLV-1-negative relatives (P<0·001). On multivariate analysis, three factors were associated with TB history: HTLV-1 infection (adjusted OR 2·5, 95% CI 1·6–3·9), age (adjusted OR 1·3, 95% CI 1·1–1·5 per 10-year age increase) and relation to the index case (adjusted OR 2·6, 95% CI 1·3–5·1, for siblingsvs. spouses of index cases). In conclusion, HTLV-1 infection may increase the susceptibility to active TB. In populations where both infections are frequent, such an association could affect the dynamics of TB.

scholarly journals Familial Autoimmune Myasthenia Gravis: Four Patients Involving Three Generations

2000 ◽  
Vol 27 (4) ◽  
pp. 307-310 ◽  
Author(s):  
R.A. Marrie ◽  
D.J. Sahlas ◽  
G.M. Bray
Keyword(s):  
Myasthenia Gravis ◽  
Medical Records ◽  
Index Case ◽  
Family Members ◽  
Monozygotic Twins ◽  
Bulbar Symptoms ◽  
History Of ◽  
Autoimmune Myasthenia ◽  
Successive Generations ◽  
Receptor Antibodies

Background:Familial autoimmune myasthenia gravis (MG) is rare, although a genetic role for the development of autoimmune MG is suggested by concordance in monozygotic twins and the increased frequency of other autoimmune diseases in family members of myasthenics.Methods:A patient with a family history of MG was evaluated in hospital. Relatives were interviewed and medical records examined for details regarding the diagnosis of MG in three other family members.Results:The index case first experienced symptoms of MG at age 75 years. She developed generalized MG and required corticosteroids and immunosuppressive therapy to control her disease. Her father developed predominantly bulbar symptoms of MG at age 75 years. He died of complications experienced following a gastrostomy placed for continued difficulty swallowing. His brother developed similar symptoms of MG in his early 60s and died shortly after thymectomy. A 46-year-old nephew of the index case is also beginning to exhibit signs of generalized MG. Acetylcholine receptor antibodies were strongly positive in the index case and her nephew. (The assay was not available for her father and uncle).Conclusion:Four individuals in three successive generations had diagnoses of autoimmune MG. Study of familial cases such as these may clarify the contribution of genetic factors to the development of this disease.

scholarly journals Impact of Delay in Diagnosis in Outcomes in MEN1: Results From the Dutch MEN1 Study Group

2016 ◽  
Vol 101 (3) ◽  
pp. 1159-1165 ◽  
Author(s):  
Rachel S. van Leeuwaarde ◽  
Bernadette P. M. van Nesselrooij ◽  
Ad R. Hermus ◽  
Olaf M. Dekkers ◽  
Wouter W. de Herder ◽  
...  
Keyword(s):  
Primary Hyperparathyroidism ◽  
Multiple Endocrine Neoplasia Type ◽  
Index Case ◽  
Family Members ◽  
Lag Time ◽  
Delay In Diagnosis ◽  
The Family ◽  
Lag Times ◽  
Index Cases

Abstract Objective: Identifying a germline mutation in the multiple endocrine neoplasia type 1 (MEN1) gene in an index case has consequences for a whole family. Eligible family members should be offered genetic counseling and MEN1 mutation testing. Subsequently, clinical screening of mutation carriers according to the guidelines should be initiated. We assessed whether there is a lag time from MEN1 diagnosis of the index case to MEN1 diagnosis of family members. In addition, we determined whether this lag time was associated with an increased morbidity and mortality risk. Design: A cohort study was performed using the Dutch MEN1 database, including &gt;90% of the Dutch MEN1 population &gt;16 years of age (n = 393). Results: Fifty-eight MEN1 families were identified, of whom 57 were index cases and 247 were non-index cases (n = 304). The median lag time in MEN1 diagnosis of family members was 3.5 (range, 0–30) years. At the time of MEN1 diagnosis, 30 (12.1%) non-index cases had a duodenopancreatic neuroendocrine tumor, of whom 20% had metastases with a mean lag time of 10.9 years, in comparison with 7.1 years without metastases. Twenty-five (10.1%) non-index cases had a pituitary tumor, of whom 80% had a microadenoma and 20% had a macroadenoma, with mean lag times of 7.2 and 10.6 years, respectively. Ninety-five (38.4%) non-index cases had a primary hyperparathyroidism with a mean lag time of 9.5 years in comparison with seven patients without a primary hyperparathyroidism with a mean lag time of 3 years (P = .005). Ten non-index cases died because of a MEN1-related cause that developed during or before the lag time. Conclusion: There is a clinically relevant delay in MEN1 diagnosis in families because of a lag time between the diagnosis of an index case and the rest of the family. More emphasis should be placed on the conduct of proper counseling and genetic testing in all eligible family members.

scholarly journals Secondary attack rates of COVID-19 in Norwegian families: a nation-wide register-based study

2021 ◽  
Author(s):  
Kjetil Telle ◽  
Silje B. Jørgensen ◽  
Rannveig Hart ◽  
Margrethe Greve-Isdahl ◽  
Oliver Kacelnik
Keyword(s):  
Young Children ◽  
Index Case ◽  
Family Members ◽  
Age Group ◽  
Older Children ◽  
Index Child ◽  
Individual Level ◽  
The Family ◽  
Index Cases ◽  
Index Family

AbstractTo characterize the family index case for detected SARS-CoV-2 and describe testing and secondary attack rates in the family, we used individual-level administrative data of all families and all PCR tests for SARS-CoV-2 in Norway in 2020. All families with at least one parent and one child below the age of 20 who lived at the same address (N = 662,582), where at least one member, i.e. the index case, tested positive for SARS-CoV-2 in 2020, were included. Secondary attack rates (SAR7) were defined as the share of non-index family members with a positive PCR test within 7 days after the date when the index case tested positive. SARs were calculated separately for parent- and child-index cases, and for parent- and child-secondary cases. We identified 7548 families with an index case, comprising 26,991 individuals (12,184 parents, 14,808 children). The index was a parent in 66% of the cases. Among index children, 42% were in the age group 17–20 and only 8% in the age group 0–6. When the index was a parent, SAR7 was 24% (95% CI 24–25), whilst SAR7 was 14% (95% CI 13–15) when the index was a child. However, SAR7 was 24% (95% CI 20–28) when the index was a child aged 0–6 years and declined with increasing age of the index child. SAR7 from index parent to other parent was 35% (95% CI 33–36), and from index child to other children 12% (95% CI 11–13). SAR7 from index child aged 0–6 to parents was 27% (95% CI 22–33). The percent of non-index family members tested within 7 days after the index case, increased from about 20% in April to 80% in December, however, SAR7 stabilized at about 20% from May. We conclude that parents and older children are most often index cases for SARS-CoV-2 in families in Norway, while parents and young children more often transmit the virus within the family. This study suggests that whilst the absolute infection numbers are low for young children because of their low introduction rate, when infected, young children and parents transmit the virus to the same extent within the family.

scholarly journals Episodic Hematuria in a Young Boy - Do Not Miss Familial Idiopathic Hypercalciuria

2019 ◽  
Vol I (1) ◽  
pp. 1-2
Author(s):  
Vinay Rathore
Keyword(s):  
Family History ◽  
Renal Tubular Acidosis ◽  
Renal Pelvis ◽  
Index Case ◽  
Family Members ◽  
Renal Stones ◽  
Idiopathic Hypercalciuria ◽  
Adequate Hydration ◽  
History Of ◽  
Renal Tubular

Familial hypercalcemia is an important cause of episodic hematuria in children and can lead to nephrolithiasis if untreated. Elucidation of proper family history and screening of family members can help in clinching the diagnosis. An 8-year-old boy presented with episodic painless hematuria for 3 years, with a history of small renal stones in parents, which was managed conservatively. Ultrasound showed concretions in the renal pelvis, and urinalysis revealed hypercalciuria in the absence of renal tubular acidosis in index case as well as parents. He was started on thiazides, oral citrate supplementation, and adequate hydration, following which he became asymptomatic.

scholarly journals Secondary Attack Rates of COVID-19 in Norwegian Families: A Nation-Wide Register-Based Study

2021 ◽  
Author(s):  
Kjetil Telle ◽  
Silje B. Jørgensen ◽  
Rannveig Hart ◽  
Margrethe Greve-Isdahl ◽  
Oliver Kacelnik
Keyword(s):  
Young Children ◽  
Index Case ◽  
Family Members ◽  
Age Group ◽  
Older Children ◽  
Index Child ◽  
Individual Level ◽  
The Family ◽  
Index Cases ◽  
Index Family

Abstract To characterize the family index case for detected SARS-CoV-2 and describe testing and secondary attack rates in the family, we used individual-level administrative data of all families and all PCR tests for SARS-CoV-2 in Norway in 2020. All families with at least one parent and one child below the age of 20 who lived at the same address (N=662 582), where at least one member, i.e. the index case, tested positive for SARS-CoV-2 in 2020, were included. Secondary attack rates (SAR7) were defined as the share of non-index family members with a positive PCR test within seven days after the date when the index case tested positive. SARs were calculated separately for parent- and child-index cases, and for parent- and child-secondary cases. We identified 7548 families with an index case, comprising 26 991 individuals (12184 parents, 14808 children). The index was a parent in 66% of the cases. Among index children, 42% were in the age group 17-20 and only 8% in the age group 0-6. When the index was a parent, SAR7 was 24% (95%CI 24 to 25), whilst SAR7 was 14% (95%CI 13 to 15) when the index was a child. However, SAR7 was 24% (95%CI 20 to 28) when the index was a child aged 0-6 years and declined with increasing age of the index child. SAR7 from index parent to other parent was 35% (95%CI 33 to 36), and from index child to other children 12% (95%CI 11 to 13). SAR7 from index child aged 0-6 to parents was 27% (95%CI 22 to 33). The percent of non-index family members tested within 7 days after the index case, increased from about 20% in April to 80% in December, however, SAR7 stabilized at about 20% from May. We conclude that parents and older children are most often index cases for SARS-CoV-2 in families in Norway, while parents and young children more often transmit the virus within the family. This study suggests that whilst the absolute infection numbers are low for young children because of their low introduction rate, when infected, young children and parents transmit the virus to the same extent within the family.

scholarly journals A clinicoepidemiological study of familial leprosy

2021 ◽  
Vol 7 (3) ◽  
pp. 260-264
Author(s):  
Dilip Kumar N R ◽  
Shashikiran A R ◽  
Laxmi B Horatti
Keyword(s):  
Index Case ◽  
Family Members ◽  
World Health ◽  
The Family ◽  
Study Population ◽  
Health Organization ◽  
Multibacillary Leprosy ◽  
Very High ◽  
Index Cases ◽  
Close Contacts

: Hansen’s disease (also known as leprosy) is an infection caused by Mycobacterium leprae which can affect the skin, mucous membranes and nerves. It is known to spread among and infect family members. There are very few published studies pertaining to family leprosy conducted in India and worldwide. : To find the prevalence of familial leprosy and to know the clinicoepidemiological patterns of these cases.: Observational study.: This was a descriptive study conducted for a period of five years from 2013-2018. The study population included all new documented cases of leprosy visiting our out-patient department during the study period. All the patients were diagnosed as leprosy on histopathological confirmation or by the presence of cardinal signs of leprosy according to the world health organization (WHO) definition. The data collected was analysed by simple descriptive statistics. Permission to conduct the study was taken from institutional ethical committee. Consent was taken from index case and family members.: A total of 302 new leprosy cases with 18 index cases (n=18) whose family members were affected, accounting for the prevalence of 5.96 %. Total number of family members with documented leprosy (old or newly detected) was 26. So, the total number of leprosy cases were 44 (index cases + family members). Out of the 18 families, 4 families had more than one person who was affected. 8 cases (18.18%) of Childhood leprosy were noted. Among the index cases 4 cases (22%) of paucibacillary leprosy were seen and 14 cases (78%) of multibacillary leprosy was seen. Among the family members, 18 cases of paucibacillary leprosy were seen and 8 cases of multibacillary leprosy were seen. Conjugal leprosy was seen in 10 families accounting for the prevalence of 3.31%. : Our study intends to emphasize the importance of examining the close contacts of a case of leprosy, especially the family members in whom the incidence of leprosy could be very high. By way of identifying leprosy cases early in its course we may be able to prevent deformities to a great extent.

scholarly journals The index case of COVID-19 in Northeastern Iran

2020 ◽  
Vol 90 (4) ◽  
Author(s):  
Khadijeh Kalan Farmanfarma ◽  
Alireza Moslem ◽  
Fereshteh Ghorat ◽  
Mohammad Nematshahi ◽  
Azam Moslem ◽  
...  
Keyword(s):  
Laboratory Test ◽  
Clinical Symptoms ◽  
Index Case ◽  
Family Members ◽  
Complete Recovery ◽  
Laboratory Diagnosis ◽  
Neurological Illness ◽  
History Of

The index case of COVID-19 in Sabzevar, Khorasan Razavi Province in northeastern Iran, was an 80-year-old man with a history of psycho-neurological illness and acute respiratory clinical symptoms, and a history of travel to areas with confirmed COVID-19 cases in Gorgan City. He was identified on February 16, 2020, and his laboratory diagnosis was made on February 26, 2020. The patient was hospitalized and discharged after complete recovery. The contacts of the patient were traced, revealing the infection of his 30-year-old son with milder symptoms of COVID-19, which was confirmed through a laboratory test on April 4, 2020 and was recommended for home quarantine. Other family members had no signs of COVID-19.

scholarly journals Secondary attack rates of COVID-19 in Norwegian families: A nation-wide register-based study

2021 ◽  
Author(s):  
Kjetil Telle ◽  
Silje B. Jørgensen ◽  
Rannveig Hart ◽  
Margrethe Greve-Isdahl ◽  
Oliver Kacelnik
Keyword(s):  
Young Children ◽  
Index Case ◽  
Family Members ◽  
Control Measures ◽  
Older Children ◽  
Index Child ◽  
Individual Level ◽  
The Family ◽  
Index Cases ◽  
Index Family

Background Reported transmission rates of SARS-CoV-2 within families vary widely, and there are few reports on transmission from children to other family members. More knowledge is needed to guide infection control measures. Objective To characterize the family index case for detected SARS-CoV-2 and describe testing and secondary attack rates in the family. Design Register-based cohort study. Setting Individual-level administrative data of all families and all PCR tests for SARS-CoV-2 in Norway in 2020. Participants All families with at least one parent and one child below the age of 20, who lived at the same address (N=662 582), where at least one member tested positive for SARS-CoV-2 in 2020. Main outcome measures Secondary attack rates (SAR7) were defined as the share of non-index family members with a positive PCR test within seven days of the index case. SARs were calculated separately for parent- and child-index cases, and for parent- and child-secondary cases. Results We identified 7548 index cases, comprising 26 991 individuals, of which 12184 were parents and 14808 children. The index was a parent in 66% of the cases. Among the children, 42% of the index cases were in the age group 17-20 and only 8% 0-6 years. When the index was a parent, SAR7 was 24% (95%CI 24 to 25), whilst SAR7 was 14% (95%CI 13 to 15) when the index was a child. However, SAR7 was 24% (95%CI 20 to 28) when the index was a child aged 0-6 years and declined steeply with increasing age of the index child. SAR7 from index parent to other parents was 35% (95%CI 33 to 36), and from index child to other children 12% (95%CI 11 to 13). SAR7 from index child aged 0-6 to parents was 27% (95%CI 22 to 33). The percent of non-index family members tested within 7 days after the index case, increased from about 20% in April to 80% in December, however, SAR7 stabilized at about 20% from May. Conclusion Parents and older children are most often index cases for SARS-CoV-2 in families in Norway, while parents and young children more often transmit the virus within the families. This study suggests that whilst the absolute infection numbers are low for young children because of their low introduction rate, when infected, young children and parents transmit the virus to the same extent within the family.

scholarly journals 401. Natural History of Shedding and Household Transmission of Severe Acute Respiratory Syndrome Coronavirus 2 Using Intensive High-Resolution Sampling

2021 ◽  
Vol 8 (Supplement_1) ◽  
pp. S302-S302
Author(s):  
Jonathan Altamirano ◽  
Prasanthi Govindarajan ◽  
Andra Blomkalns ◽  
Sean Leary ◽  
India Robinson ◽  
...  
Keyword(s):  
Risk Factors ◽  
Index Case ◽  
Socioeconomic Indicators ◽  
Rt Pcr ◽  
Viral Spread ◽  
Household Contacts ◽  
Household Transmission ◽  
Secondary Infections ◽  
History Of ◽  
Index Cases

Abstract Background In order to mitigate the spread of SARS-CoV-2 and the COVID-19 pandemic, public health officials have recommended self-isolation, self-quarantine of exposed household contacts (HHC), and mask use to limit viral spread within households and communities. While household transmission of SARS-CoV-2 is common, risk factors for HHC transmission are poorly understood. Methods In this prospective cohort study, we enrolled 37 households with at least one reverse transcription polymerase chain reaction-confirmed (RT-PCR) COVID-19 index case from March 2020 - March 2021, in order to calculate secondary attack rates (SAR) and define risk factors for secondary infections. Participants were tested daily for SARS-CoV-2 via RT-PCR, using self-collected lower nasal samples. Households were followed until all members tested negative for seven consecutive days. We collected demographics, medical conditions, relationship to index case, and socioeconomic indicators. Subgroup data analysis was conducted and stratified by positivity status. Results Of 99 enrolled participants, 37 were index cases and 62 were household contacts (HHC), of whom 25 HHC were infected (40.3%). Secondary attack rate (SAR) was highest among adults caring for a parent (n=4/4, 100%) and parents of index cases (5/10, 50%). Households whose income came from service work had greater risk of transmission compared to households whose primary income was technology (n=5/7; 71.4% vs 3/8; 37.5% respectively). Pediatric contacts were at lower risk of infection when compared to adult contacts (n=5/18, 27.8% vs n=20/44, 45.5% respectively). Conclusion This study suggests that household transmission represents a key source of community-based infection of SARS-CoV-2. Allocating resources for education/training regarding prevention among infected individuals and their close contacts will be critical for control of future outbreaks of SARS-CoV-2. Disclosures All Authors: No reported disclosures

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