Mite and cockroach sensitisation in patients with allergic rhinitis in the Free State

Seedat, Riaz Y.; Claassen, J.O.; Claassen, André; Joubert, Gina

doi:10.7196/samj.3669

Cited by 14 publications

(11 citation statements)

References 18 publications

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“…Grass pollens have previously been shown to be the most common allergen in patients with allergic rhinitis in the Free State. 8,9 Many participants had symptoms present throughout the year, but they were at their worst between August and October. This is in keeping with other studies which also found that patients report their symptoms to be at their worst in spring.…”

Section: Discussionmentioning

confidence: 99%

Allergic rhinitis in medical students at the University of the Free State

Seedat

Sujee

Ismail

et al. 2018

South African Family Practice

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Background: Allergic rhinitis, the most common form of chronic rhinitis, can adversely affect quality of life. The prevalence of allergic rhinitis in adolescents in South Africa has been estimated to be 38.5%, but there is a paucity of data from African countries on allergic rhinitis. Aim: The aim of this study was to determine the prevalence of allergic rhinitis in medical students in the Faculty of Health Science at the University of the Free State (UFS). Information was acquired on the effects that the condition had on participants with regard to symptoms, quality of life, disease management and treatment. Methods: A cross-sectional study design was used. A self-administered anonymous questionnaire was distributed to all medical students registered with the Faculty of Health Sciences at UFS in 2016. The estimated population was 706 students. Results: The response rate was 62.6%. The prevalence of allergic rhinitis was 39.1%. The most common symptoms were rhinorrhoea (64.8%), repeated sneezing (64.3%) and nasal obstruction (58.5%). Symptoms were at their worst during August to October. Antihistamines had been used by 82.4% of participants to treat their symptoms in the previous 12 months, while 28.8% had used an intranasal steroid spray. Conclusion: The prevalence of allergic rhinitis in medical students at UFS was 39.1%. Rhinorrhoea, sneezing and nasal obstruction were the most frequent and bothersome symptoms.

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Section: Discussionmentioning

confidence: 99%

Allergic rhinitis in medical students at the University of the Free State

Seedat

Sujee

Ismail

et al. 2018

South African Family Practice

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“…The finding of high levels of sensitisation to the spider mite Tetranychus, readily explained by the widespread prevalence of the mite in Free State farms referred to by Seedat et al, 3 has also been reported from the Hex River Valley in the studies of Jeebhay.…”

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confidence: 83%

“…It is interesting to note that Seedat et al 3 found that allergic subjects in the Free State who had previously lived at the coast were significantly more likely to be sensitised to mites than those who had not, emphasising the importance of history taking when selecting allergy test panels for the investigation of allergic patients.…”

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confidence: 99%

“…2 This issue of the SAMJ features a new study by Seedat et al 3 on indoor and outdoor allergen sensitisation in the Free State. Not only does the study identify sensitisation to a previously unrecognised outdoor allergen (the spider mite, Tetranychus urticae) in the region, but it reports that the sensitisation rate to house-dust mites in patients with allergic rhinitis is a significant 46% for Dermatophygoides pteronyssinus and 44% to D. farinae using the ImmunoCap RAST.…”

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Indoor and outdoor allergens in Bloemfontein

Potter¹

2010

S Afr Med J

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The Free State province of South Africa is traditionally considered to be a haven for outdoor allergens such as grass pollens, which cause severe hayfever symptoms in the grass pollen season, and maize pollens, particularly in the rural areas.In 1991 Mercer and Van Niekerk reported a house-dust mite skin-prick test positivity rate of 25.7% in an asthma clinic in Bloemfontein, 1 compared with a prevalence of 80% reported in children attending an allergy clinic in coastal Cape Town. on indoor and outdoor allergen sensitisation in the Free State. Not only does the study identify sensitisation to a previously unrecognised outdoor allergen (the spider mite, Tetranychus urticae) in the region, but it reports that the sensitisation rate to house-dust mites in patients with allergic rhinitis is a significant 46% for Dermatophygoides pteronyssinus and 44% to D. farinae using the ImmunoCap RAST.A second small acaralogical study by Sinclair et al. 4 of housedust mite species in Bloemfontein, also published in this issue of SAMJ, found house-dust mite in 50% of the homes investigated at some time of the year, and in 30% mites were present consistently.The finding of high levels of sensitisation to the spider mite Tetranychus, readily explained by the widespread prevalence of the mite in Free State farms referred to by Seedat et al., 3 has also been reported from the Hex River Valley in the studies of Jeebhay.5 Since many subjects sensitised to spider mite are simultaneously polysensitised to other outdoor and indoor allergens, the clinical significance of such sensitisation has yet to be studied by exposure and challenge studies. There are no vaccines available to desensitise patients to spider mites.In contrast, immunotherapy for house-dust mite allergens is available by the sublingual and subcutaneous routes for patients sensitised to D. farinae and/or D. pteronyssinus who do not simultaneously have other significant allergen sensitisations, on a named-patient basis. For patients in the Free State who have persistent rhinitis symptoms outside the pollen season related to the indoor environment, testing for specific mite indoor allergen sensitisation is very important, both for institution of allergen avoidance measures and selection of the appropriate mite-specific avoidance measures, and for selection of the appropriate mite-specific immunotherapy vaccine to offer the patient a chance of cure. It is interesting to note that Seedat et al.3 found that allergic subjects in the Free State who had previously lived at the coast were significantly more likely to be sensitised to mites than those who had not, emphasising the importance of history taking when selecting allergy test panels for the investigation of allergic patients.The acaralogical studies of Sinclair et al. 4 provide some insight into the variability of the presence of and therefore exposure to mites in Bloemfontein homes, and also illustrates that in some homes very high levels of mites are attained as a result of indoor microclimate factors that raise indoor...

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“…71 In South Africa 38% of patients with allergic rhinitis were sensitized to B germanica based on ImmunoCAP results. 72 …”

Section: Clinical Evaluationmentioning

confidence: 99%

Environmental assessment and exposure reduction of cockroaches: A practice parameter

Portnoy¹,

Chew²,

Phipatanakul³

et al. 2013

Journal of Allergy and Clinical Immunology

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This parameter was developed by the Joint Task Force on Practice Parameters, representing the American Academy of Allergy, Asthma & Immunology (AAAAI); the American College of Allergy, Asthma & Immunology (ACAAI); and the joint Council of Allergy, Asthma & Immunology. The AAAAI and the ACAAI have jointly accepted responsibility for establishing “Environmental assessment and remediation: a practice parameter.” This is a complete and comprehensive document at the current time. The medical environment is a changing environment, and not all recommendations will be appropriate for all patients. Because this document incorporated the efforts of many participants, no single person, including those who served on the Joint Task Force, is authorized to provide an official AAAAI or ACAAI interpretation of these practice parameters. Any request for information about or an interpretation of these practice parameters by the AAAAI or ACAAI should be directed to the Executive Offices of the AAAAI, the ACAAI, and the Joint Council of Allergy, Asthma & Immunology. These parameters are not designed for use by pharmaceutical companies in drug promotion. The findings and conclusions in this manuscript are those of the authors and do not necessarily represent the official position of the Centers for Disease Control and Prevention (CDC).

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Mite and cockroach sensitisation in patients with allergic rhinitis in the Free State

Cited by 14 publications

References 18 publications

Allergic rhinitis in medical students at the University of the Free State

Allergic rhinitis in medical students at the University of the Free State

Indoor and outdoor allergens in Bloemfontein

Environmental assessment and exposure reduction of cockroaches: A practice parameter

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