The influence of ABO blood groups, Rh antigens and cigarette smoking on the level of NK activity in normal population

In this study we have examined the influence of ABO and Rh blood groups as well as the effect of cigarette smoking on the level of NK activity in healthy men. Blood bank donors and age-matched non-donors have been evaluated independently. As far as ABO blood groups are concerned, higher NK activity in individuals with AB blood group in comparison with those with group A and those with groups A, B, and O taken together have been demonstrated. No effect of Rh antigens on NK activity has been found. Similarly, there was no influence of cigarette smoking on NK activity. Consistently lower values of NK activity in blood bank donors in comparison with non-donors have been shown.     

Prevalence of seroreactivity among blood donors in rural population

The seroreactivity pattern amongst blood donors in rural population was studied at S.R.T. Rural Medical College and Hospital, Ambajogai (M. S.). The study period was from January 1996 to December 2001. A total number of 12,240 blood donors were screened. The voluntary donation was 36.98% and replacement donors were 63.02%. No professional donor is bled in our blood bank. The HIV seroreactivity among voluntary donors was 1.56% and 2.11% in replacement donors. The HBsAg seroreactivity was 2.78% in voluntary donors and 4.84% in replacement donors. VDRL seroreactivity is 1.12% in replacement donors. No malarial parasite and HCV seroreactive donor was found in our study period. We have found the magnitude of hepatitis to be far more than that of HIV. Hence testing for HCV routinely is mandatory, besides HBsAg.     

Transfusion-associated acquired immunodeficiency syndrome. Evidence for persistent infection in blood donors

To investigate whether infection with human T-cell lymphotropic virus/lymphadenopathy-associated virus (HTLV-III/LAV) may be persistent in asymptomatic persons and to correlate infection with seropositivity, we performed virologic and serologic studies in 25 of 30 persons who were identified as being at high risk for the acquired immunodeficiency syndrome (AIDS) and who had donated blood to patients who later contracted transfusion-associated AIDS. High-risk donors were those who belonged to a high-risk population, had AIDS or a closely related condition, or had a low ratio of helper to suppressor T lymphocytes. We performed similar studies in 6 of the 24 patients with AIDS who had received donations from this group. HTLV-III/LAV was isolated from 22 of the 25 donors, between 12 and 52 months (mean, 28) after they had donated blood, and from all 6 recipients, between 14 and 37 months (mean, 26) after they had received blood. Of the 22 virus-positive donors, 2 have contracted AIDS, 5 have generalized lymphadenopathy, and 15 (68 per cent) remain asymptomatic. Antibodies to HTLV-III/LAV were detectable by the enzyme-linked immunosorbent assay in serum samples obtained from each person at the time the virus was isolated. We conclude that infection with HTLV-III/LAV may be persistent and asymptomatic for years. This demonstration that viremic patients may be asymptomatic supports the use of serologic screening of donated blood to supplement current procedures for the prevention of transfusion-associated AIDS.     

Plateletpheresis donation through donor awareness,motivation, and recruitment drives: A unique concept and experience from a tertiary care oncology centre in India

ObjectivesThe majority of blood donor motivational and awareness activities are directed toward whole blood donation and not much emphasis is given to the plateletpheresis. The study was designed to analyze the effectiveness of the unique concept of platelet drives (PD) to increase voluntary plateletpheresis donations.Materials and methodsThe study was a retrospective study conducted at a tertiary care oncology hospital-based blood transfusion services (BTS).ResultsA total of 13 PDs were conducted from January 2016 to December 2020. A total of 559 potential donors came for the donor registration and 125 donors got deferred on medical history. A total of 434 donors gave their samples for the testing of plateletpheresis. The median age of potential male and female donors was 32 and 30 years respectively. A total of 58 males and two females have donated single donor platelets (14.3% vs. 7.4%, P = 0.319). The median age of male and female donors was 36 and 42 years, respectively. In male donors, 48 had donated once, seven donated twice, two donated thrice and one donor donated four times. Out of two female donors, one donor donated twice and the other donor donated four times. The female donors were more committed to repeat donations (P = 0.004). Since the start of PDs, the number of voluntary donations has increased considerably over the years.ConclusionPDs have helped in increasing the number of voluntary plateletpheresis donors. All the BTS must have the standard operating procedures in place for these kinds of awareness and motivational drives.     

Anaemia and iron status among blood donors in a blood transfusion unit in Malaysia

Iron deficiency is a major complication of regular blood donation as a result of regular iron loss from each donated blood unit. Ninety-two regular blood donors and 95 first time blood donors attending a hospital-based blood transfusion centre were assessed as to their haematological and iron status by blood counts and serum ferritin levels as an indicator of iron stores. All donors had passed the haemoglobin-screening test using a copper sulphate method prior to blood donation. Ferritin levels were found to be significantly lower among regular blood donors (47.8 mmol/L) as compared to first time blood donors (94.2 mmol/L). Iron deficiency as observed by low ferritin levels was seen in 7.4% of all first time donors as compared to 17.4% in regular donors. Male first time donors showed a low prevalence of iron deficiency but the prevalence significantly increased with regular blood donation. Female first time and regular blood donors however did not show any significant differences in prevalence of iron deficiency, with both groups exhibiting prevalence rates similar to male regular donors. The association between haemoglobin levels and iron deficiency was poor and the copper sulphate-screening test was found insensitive to anaemia with many donors passing the test and donating blood despite being anaemic. It is concluded that a high prevalence of iron deficiency is present among regular male blood donors and all female donors. Besides, the use of the copper sulphate screening test as a sole criterion for anaemia screening should be reviewed. Ferritin measurements should be included in the routine assessment of blood donors especially among regular blood donors.     

Pretransfusion screening tests for HIV and HTLV-I in donated blood

Screening tests for HIV and HTLV-I in donated blood were introduced into Japan in Nov. 1986. I) The incidence of HIV-antibody (Ab) among donated blood in Japan is hitherto as low as 1-2/500,000. However, those Ab tests used at present may overlook HIV-infected donors before of their seroconversion. A newly developed HIV-antigen (Ag) test has yielded positive results in 4 out of 29 (13.8%) of our HIV-Ab+ hemophiliacs (all in the AC stage), although none of the 27 HIV-Ab negatives were HIV-Ag+. The rate of Ag+ was higher in the group showing disappearance of p 24-band on the Western blot (WB). The isolation of HIV was successful in 6 out of 13 (46.2%) AC hemophiliacs, even in three with negative HIV-Ag. The usefulness of these new tests for screening should be estimated from the standpoint of the cost/benefit balance. In future, the screening for HIV-2 may also be needed. II) Gelatin particle agglutination test (PA) could detect not only IgG- but also IgM-HTLV-I Ab, while the latter is overlooked by ELISA. On the other hand, a few of false negatives by PA could be observed. Anti-HTLV-I Ab was found in 2% of our donors, the frequency being higher among those who had previously received blood transfusions. If possible, all of the donated blood should be chemically and/or physically treated to inactivate any contaminating viruses.(ABSTRACT TRUNCATED AT 250 WORDS)     

Infectious markers in blood donors of East Delhi: prevalence and trends

All blood donors Voluntary and Replacement who have donated blood in the centre or in the voluntary blood donation camps, were analyzed for the prevalence of infectious markers over a period of 3 years from 1997 to 1999. A total of 52500 blood units were collected and screened for hepatitis B surface antigen (HBsAg), antibodies to HIV I and II and VDRL reactivity. Seropositivity was 471 (0.8%) for HIV I and II, 963 (1.8%) for HbsAg, 1449 (2.76%) for VDRL and 64 (0.5%) for anti HCV. Voluntary donors were comparatively safe. The seropositivity for HIV showed increasing trend between 1997 to 1999.     

Thalassaemia in Iran: Thalassaemia prevention and blood adequacy for thalassaemia treatment

Thalassaemia major is a hereditary disease mostly prevalent in the region called ‘thalassaemia belt’. Iran is one of the countries situated in thalassaemia belt. Four per cent of Iranian population is the carriers of beta‐thalassaemia gene. So far 18 783 major thalassaemics have been registered in Iran, and this number is the highest registered figure for thalassaemia among the world countries. The thalassaemia prevention program has started since 1995 in Iran that has led to a significant decrease in newborn cases so that the downward rate of new thalassaemia births was estimated to be 82·3% in 2009; this is a considerable success among developing Islamic countries. Iran enjoys a national blood network that ensures blood adequacy for thalassaemics. All blood donations are donated by voluntary blood donors, and the rate of blood donations by regular voluntary blood donors reached 54·07% in 2016. In recent years, through the care provided and measures taken the prevalence rate of HCV and HIV has declined the lowest level and it makes blood safety in Iran abreast of that in developed countries. Given the success of thalassaemia prevention program in Iran and blood adequacy for thalassaemics, Iran can act as the role model for the countries located on thalassaemia belt particularly in the Middle East and the North Africa.     

Distraction reduces self-reported physiological reactions to blood donation in novice donors with a blunting coping style

OBJECTIVE: Vasovagal reactions experienced by some blood donors (eg, faintness, lightheadedness, and dizziness) have been shown to be related to a decreased likelihood of future blood donations. This study evaluated the efficacy of audiovisual distraction as a means of reducing self-reported physiological reactions in first-time blood donors. Because interventions that are consistent with an individual's preferred coping style have been shown to be more effective at reducing physiological and psychological responses to stressful medical procedures, coping style (monitoring vs. blunting) was assessed as a possible moderating variable. METHODS: First-time blood donors were randomly assigned to one of two conditions: audiovisual distraction or no-treatment control. Participants in the distraction group donated blood at an American Red Cross blood drive while watching a three-dimensional video presentation on a personal visor and headset. The control group donated blood according to standard American Red Cross procedures. Score on a self-reported measure of physiological reactions completed immediately after donation served as the dependent variable. RESULTS: Individuals who typically use blunting coping strategies to cope with stress reported an attenuation of vasovagal reactions to blood donation in the distraction vs. the control condition (t(49) = 2.29, p < .05), whereas donors who prefer a monitoring coping style did not benefit from distraction. CONCLUSIONS: Among first-time blood donors, audiovisual distraction may be an effective means of reducing vasovagal reactions in donors who prefer to cope with stress using such strategies as distraction, denial, and reinterpretation.     

A confirmatory diagnosis of antibodies anti-Trypanosoma cruzi in donors referred by blood banks in Venezuela

To establish the confirmatory diagnosis of Trypanosoma cruzi infection, at least two immunoserological tests (ELISA, Indirect hamaglutination, IH, Complement Fixation Test, CFT) were carried out in 254 donors, from public and private blood banks of Venezuela, during 48 months between 1997-1998 and 2003-2004, referred to the Immunology Section of the Tropical Medicine Institute in Caracas. Antibodies anti-T. cruzi were detected in 129/254 (50,79%) by ELISA-IgG or IH and CFT. The "artificial xenodiagnosis" was positive in 10/118 persons with positive confirmed serology. Of 129 donors found positive by the serological tests, 68 were living in the capital region and 61 in the interior of the country. Likewise 113 were born in the interior of the country, 8 in Caracas and 8 in Colombia. Of them, 12 individuals serologically confirmed declared to have donated blood in a minimum of 4 occasions before diagnosis. The present study emphasizes the importance of detection of antibodies against T. cruzi in the integral evaluation of blood donors, since many of them with antibodies anti-T. cruzi, have donated blood several times previous to diagnosis.     

Seroprevalence of hepatitis C antibodies in healthy blood donors--a prospective study

In the last decade, hepatitis C has emerged from obscurity as a disease (Non A Non B Hepatitis)familiar to only a few experts, to being recognized as a major public health problem. The present study was done to find out the seroprevalence of hepatitis C virus in 5000 blood donors in Patiala and to compare its seroprevalence in voluntary and replacement blood donors. The testing for HCV antibodies was done by ELISA technique using third generation HCV microlisa kit. Seroprevalence of anti-HCV amongst 5000 healthy blood donors was 0.88%. It was 0.58% in voluntary blood donors and 0.95% in replacement blood donors. Anti-HCV positivity was significantly higher amongst males (0.97%) than females (0.59%). Maximum anti-HCV positivity was seen in 41-50 year age group in voluntary donors and 31-40 year age group in replacement group. This study made us to conclude that above results were due to multiple reasons like transfusion of blood and blood products from unscreened donors, medical injections, tattooing, intravenous drug abuse, traditional medicinal practices, sexual promiscuity and lack ofawareness in rural population about the disease and mode of spread.     

The histopathological features of asymptomatic hepatitis C virus-antibody positive blood donors

Since the introduction of screening for hepatitis C virus (HCV) in donated blood, the risk of contracting post-transfusion hepatitis has been greatly reduced and the test has led to the recognition of asymptomatic blood donors positive for anti-HCV antibodies. Following confirmation of the HCV status with second generation RIBA testing followed by counselling, 55 patients had full investigations, including liver biopsy. These were classified by the traditional chronic hepatitis system and were graded according to the Knodell and Scheuer histological activity indices. Seven of the biopsies were normal (12%), apart from minor degrees of steatosis in two. Eleven cases (20%) were in the chronic lobular hepatitis category without portal inflammation, while 37 cases showed portal inflammation, including 20 (36%) cases where chronic persistent hepatitis was the predominant feature and 17 cases (31%) where there was chronic active hepatitis with piecemeal necrosis. Features which have previously been described in chronic HCV-associated hepatitis were noted: portal lymphoid aggregates (58%), lymphoid follicles with germinal centres (15%), bile duct damage (11%), lobular inflammation (80%), sinusoidal mononuclear cell infiltration (26%), acidophil body formation (11%), and steatosis (47%). Fibrosis was present in 46% of cases but was generally of mild degree; 9% of biopsies demonstrated bridging fibrosis but no cases of cirrhosis were present. Even though serum transaminase levels correlated well with the presence of chronic hepatitis and with the Scheuer and Knodell activity indices, a proportion of patients with significant liver damage had normal transaminase levels, and this study suggests the need for liver biopsy in the evaluation of asymptomatic HCV-positive blood donors.     

What motivates regular blood donations?

Background In 2002, the medical benefits scheme given to blood donors who gave two donations a year was successfully removed. However, those who were already on the scheme continued to enjoy that benefit as long as they keep up with the two donations a year. About 30 000 donors were on the scheme in 2001, but less than 7000 were left on the scheme today. A study was conducted in 2010 to investigate what really motivates this group of blood donors. Study Design and Methods A questionnaire, in the four official language of Singapore, was sent to all the blood donors on the scheme. A response rate of 41·6% yielded a sample of 2898. Results Of the 89·9% who agreed blood donation is an act of pure goodwill, 19·2% said they will not donate blood for nothing. Interestingly, 18·5% of those who do not consider blood donation as an act of pure goodwill was willing to donate blood for nothing. Of those who said that they will continue to donate blood in the absence of all rewards or incentives, 70·6% gave more than one donation a year, with 72·7% giving three to four donations and 75·9% giving more than four donations. Conclusion These findings suggested that regular blood donors are self-motivated. The more they give, the more they value their contributions. This motivation is not related to their income or education levels, but reflected the sense of ‘upmanship’. This revelation can be used to strengthen retention strategies in better acknowledging the contributions of regular blood donors and in enhancing the quality of donor services and donor care, as delighted blood donors will make many happy returns.     

Preoperative autologous blood donation in 612 hospitals. A College of American Pathologists' Q-Probes study of quality issues in transfusion practice.

We compared predeposit autologous blood utilization practices in 612 hospitals (where 107,559 autologous and 2,504,522 homologous units were transfused in all of 1989). Participating blood bankers prospectively followed up donors who presented for initial donation during an 11-week period in early 1990. They recorded the number of autologous donors whose blood was drawn (n = 22,276); units that were donated (n = 40,163), transfused (n = 23,988), crossed over (n = 937), and discarded (n = 15,443); and donors transfused with autologous blood only (n = 11,923) or donors who received homologous blood (n = 2002). Most donors (89.7%) avoided homologous blood, including donors (39.5%) who did not require transfusion. Units that were donated for low-risk surgery represented 23.1% of all units that were collected, and the rate of donation for these procedures was directly proportional to the percentage of donors who did not require transfusion and to the discard rate. We concluded that a major focus of quality improvement in autologous transfusion practice should be the reduction of donations for surgical procedures for which blood replacement is rarely needed.     

How safe are our safe donors?

One of the greatest challenges of transfusion medicine is the prevention of transmission of infectious diseases through blood transfusion. The aim of this study is to present the current status of transfusion transmitted diseases among healthy unpaid blood donors so as to heighten the awareness of the complications of blood transfusion and make usmore vigilant with regard to the specifics of blood collection and testing as well as judicious use of blood. 8617 donors donated at St. Johns Medical College Hospital Blood bank from 1st. September 1997 to 31st August 1998. The tests done on all units included testing for HIV 1&2, HBsAg, HCV, VDRL and malarial parasites. The seropositivity among donors for HIV was 0.44%, for HBsAg 1.86%, for HCV 1.02% and for VDRL 1.6% No MP Positives were picked up in the study period. The focus has been on HIV so far. We have found the magnitude of hepatitis to be far more than that of HIV. Hence testing for HCV routinely is recommended.     

Comparative blood donation knowledge attitudes and practice surveys from two multi‐ethnic communities

A recently published blood donation knowledge, attitudes and practice community survey from a developing country with family replacement donation were repeated in a developed country with exclusively voluntary non‐remunerated blood donors (VNRD). Higher altruism, information, access and percentage donors were observed in the VNRD‐based system. A family member or friend in need of blood was a powerful incentive for VNRDs. The importance of information, convenience and a regulatory pathway for VNRD was confirmed. Family replacement donation could be used to attract first‐time donors before conversion to regular VNRDs.     

The Experience of Human Milk Banking for 8 Years: Korean Perspective

Human milk banks are a solution for mothers who cannot supply their own breast milk to their sick or hospitalized infants; premature infants, in particular, are unable to receive a full volume of breast milk for numerous reasons. As of December 2015, there was only one milk bank in a university hospital in Korea. We reviewed the basic characteristics of donors and recipients, and the amounts and contamination of breast milk donated at the Human Milk Bank in Kyung Hee University Hospital at Gangdong in Korea from 2008 to 2015. The donor pool consisted of 463 first-time donors and 452 repeat donors who made 1,724 donations. A total of 10,820 L of breast milk was collected, and 9,541.6 L were processed. Detectable bacteria grew in 12.6% after pasteurization and 52.5% had cytomegalovirus DNA before pasteurization in donated milk. There were 836 infant and 25 adult recipients; among new infant recipients, 48.5% were preterm; the groups received 8,009 and 165.7 L of donor milk, respectively. There was an increase in the percentage of preterm infants among new infant recipients in 2015 (93.1%) compared to 2008 (8.5%). Based on the number of premature infants in Korea, the number of potential recipients is not likely to diminish anytime soon, despite efforts to improve the breastfeeding rate. Sustainability and quality improvement of the milk bank need long-term financial support by health authorities and a nationwide network similar to blood banking will further contribute to the progress of milk banking.     

Re-transfusion of autologous blood from wound drains: the means for reducing tranfusion requirements in total knee arthroplasty

The requirements for homologous blood transfusion in patients undergoing total knee replacements under tourniquet, before and after the introduction of autologous transfusion of blood collected from wound drains, are compared. In a control population of 93 patients undergoing total knee replacement, 67 required homologous transfusions of two units or more. In 160 patients who were re-transfused with blood from wound drains, only 30 required additional homologous transfusions. Re-transfusion of filtered drained blood reduces the need for homologous bank blood. This avoids the risks associated with donated blood and affords significant cost savings.