Hamster IgG Isotype Control Antibody (Low Endotoxin, Azide-Free) (DAG-IC34) Functional Grade

Hamster IgG Isotype Control Antibody (Low Endotoxin, Azide-Free) for FC, ELISA, FLISA


Host Species
Antibody Isotype
Species Reactivity
Functional Grade


Application Notes
*Suggested working dilutions are given as a guide only. It is recommended that the user titrates the product for use in their own experiment using appropriate negative and positive controls.


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Seroprevalence of IgG Antibodies for Dengue among Blood Donors


Authors: Bandi, Kavyasree; Thokala, Ravindra Prasad; Anandan, Ashwin; Radhakrishnan, Krishnamoorthy; Panicker, Vinod Kumar

BACKGROUND Dengue fever is endemic India and the prevalence of dengue is on the rise owing to various social and economic factors. Prevalence of asymptomatic dengue infection varies widely from less than 1 % to 80 % in India. Transfusion transmissible dengue has been reported in different parts of the word. Prevalence of subclinical dengue among blood donor poses a threat to the blood supply leading to transfusion transmissible dengue. We wanted to estimate the prevalence of IgG antibodies for Dengue in the blood donor population. METHODS Six hundred and eight whole blood donors were included in the study during the period January 2017 to October 2018. Donor registration and education was done as per the national guidelines. Donors who gave a history of previous dengue or symptoms consistent with dengue were excluded from the study. Serum samples from whole blood donors were tested for IgG antibodies using ELISA technology. RESULTS Of the total of 608 donors, 602 were male donors and 55 % of the donors were in the age group 21 - 30 years. Majority (69 %) of the donors were from urban locations. Anti IgG antibodies for dengue were present in 4.14 % of donors of which 38 % of donors were in the age group 31 - 40 years. Three hundred and eighty-four donors revealed history of fever, myalgia and headache in the past one year. No statistical significance was found between fever, myalgia and the presence of IgG anti-dengue antibodies. CONCLUSIONS The subclinical or asymptomatic prevalence of dengue infection is low when compared to other studies in other parts of the country. Enquiring into donor history for history of dengue or symptoms of dengue and deferring such donors for a recommended period will prevent transfusion transmissible dengue.

Anticoagulation with temporary Impella device in patients with heparin-induced thrombocytopenia: A case series


Authors: Hohlfelder, Benjamin; Militello, Michael A.; Tong, Michael Z.; Soltesz, Edward G.; Wanek, Matthew R.

The Impella device is a percutaneous ventricular assist devices that requires administration of heparin via a continuous purge solution. Patients on Impella device support may experience hemolysis with accompanying thrombocytopenia generating suspicion for heparin-induced thrombocytopenia (HIT). However, data and recommendations for use of non-heparin anticoagulants with Impella device are lacking. Therefore, we performed a retrospective cohort analysis of patients requiring bivalirudin during Impella device support to describe the safety and efficacy of bivalirudin as an alternative anticoagulant during Impella device support. Nine patients were included in the evaluation which analyzed Impella device purge flow and purge pressure along with bivalirudin dosing requirements, incidence of thrombosis, and incidence of pump failure. All patients had a positive platelet factor-4 IgG ELISA test, and the serotonin release assay was positive in four patients. After initiation of bivalirudin, the median (15th, 85th percentile) nadir purge flow decreased by 76% (5%, 88%) and the median (15th, 85th percentile) peak purge pressure increased by 86% (21%, 143%). At the time of bivalirudin discontinuation, the median final purge flow and pressure were 2.4 mL/h (74% decrease) and 969 mmHg (89% increase), respectively. Zero patients experienced catastrophic pump failure. Adding low concentration bivalirudin to the purge solution along with systemic bivalirudin may be a reasonable approach.

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